Archive for the ‘Digital Maps’ Category

Historic Map Compiling Project – Le Plan Scénographique de Lyon

January 7, 2014 4 comments

– High-resolution 3D (bird’s-flight) video tour of the full map
– Gigapixel compilation of the map browseable in Zoomify viewer (beta)
– Side-by-side comparison of the 1548 map with four historical derivatives (beta)

In January 2014 I digitized photographs of the 25 separate sheets that together make up “Le Plan Scénographique de Lyon vers 1550,” a huge, highly-detailed, 16th-Century axonometric (bird’s-flight view) map of the French city of Lyon (cc. 1544-53 CE). Since then I’ve been working to understand and contextualize this curious historical artifact, and this essay is one product of that effort.

The Archives municipales de Lyon holds the only known copy of the 1540s Plan Scéno (as I’ll call it here). In 1989 preservationist and paper expert Michel Guet restored the map. This involved detaching the 25 sheets from their paper backing and each other as well as removing the remnants of earlier flawed restoration efforts. In 1990 the Lyon Archives published photographs of the 25 restored map sheets along with an accompanying volume of scholarly essays (later augmented with a second set of essays). All of the essays from the project are now freely accessible on the Lyon Archives’ website.

The map segments are to be arranged for viewing in a 5 by 5 grid starting from the top left, each segment being overlapped by the segments to the right and below it. Because each segment of the published map is larger than the flatbed scanner I used, I originally scanned each segment in two parts at 600 ppi, combined them, and then reconstituted the full map using Adobe Photoshop (info tooltip | link).

Viewing the map’s 25 segments individually, it is very difficult to effectively view or even fully conceptualize the map in its totality, as a single composition. To redress this I determined to compile the 25 map segments into one contiguous digital image. I should note that significant image adjustment (aka warping) was required in some areas to insure that the segments line up logically and so the final product would appear seamless. You’ll notice that the bottom-right cartouche is lower than the one on the lower left – this is probably not a characteristic inherent in the original, but likely occurred because I compiled each row of sheets starting from the top-left, following the original numbering of the 25 sheets.

For modern viewers, the faux-aerial perspective used for pre-modern axonometric city maps is strikingly similar to the satellite-derived views provided by modern online map services (though the top of the the 1540s Plan Scénographique is mostly directed west-southwest, not north). For comparison, below is a high-contrast screenshot of Bing maps’ “Bird’s Eye view” of modern-day Lyon (facing west) compiled from multiple aerial photographs taken at an oblique 45-degree angle (click image to to explore in Bing Maps).

Note that the modern shape of Lyon is significantly different from that shown in the 1540s Plan Scénographique. This is primarily because of the largely-industrial Perrache neighborhood, extending South (left) of the highway in the modern center of the Presqu’île (peninsula), which did not exist in the 16th century. Perrache was developed from 1779-1840, incorporating southern marshland and small islands into the peninsula and moving the confluence of the Saône and Rhône rivers further downstream (source). In the sixteenth century, these low-lying islands were repeatedly flooded, destroyed, and rebuilt by the rivers. Only the edge of the area now covered by Perache is shown on the 1540s Plan Scéno, an island labelled “[BRO]TEAUX D’ENEY” in reference to the nearby Abbaye d’Ainay. I haven’t attempted to recreate how Broteau D’Ainay might have looked in 1548, but it can be seen on Philippe Le Beau’s 1607 Lyon map (optimized detail view with label indicated). Source: archives municipales de Lyon.
See Gauthiez, 2010 for more on Perrache and the confluence.

The animated map above is an augmented “mashup” incorporating three sources –

  • A blueprint of Lyon in 1544 (identified as a/the main year during which the Plan Scénographique’s survey drawings were made) adapted from a Flash presentation accompanying the Lyon Archives’ 2009 exhibit Lyon 1562: Capitale Protestante (B. Gauthiez) superimposed on
  • Geoportail‘s amazing elevation map (“Carte du Relief” layer), facing west and extended North and South, and
  • a satellite image exported from Google Earth Pro.

An observation about the above GIF – I originally labeled the top-right neighborhood (quartier) around Le Couvent l’Observance “Vaise.” Vaise is actually the name of the faubourg (suburb) located outside Lyon’s city gates on a plain north of l’Observance and west of the Saône river which was mostly farmland in the mid-1500s. The area around l’Observance could more accurately be called “Le clos des Deux-Amants” after a Roman-era funeral monument, shown on the Plan and already ancient in the 16th Century. (source: Les Cordeliers de l’Observance á Lyon, par L.A.A. Pavy et [C.] Tissseur, 1836, pp.6-11).

Click here to see the area on the digital Plan Scéno (top half of sheet 10), and from there you can switch to the 1698 and 1876 derivative maps (select from lower-left pulldown menu) to see the now-missing part of the 1540s Plan Sceno showing part of Vaise. This annotated detail from LeBeau’s 1607 map of Lyon shows more of the faubourg (a half-century later):veyz_lebeau1607

“Why not georectify the Plan Scéno, since we know where most of the represented landmarks were located, maybe even all of them?” Because the map is far from spatially accurate. The area of the W-SW-facing map overall appears to be significantly stretched N-S (the X-Axis) compared to the real-world dimensions. This uneven stretching is most notable in the bends of the Saône river as it rounds the central hill Fourvière, which are far less sharp than in the real world. This may have been deliberate artistic license rather than a mistake, as the elongation allows the cartographer more left-right room to include location-based labels and imagery, particularly along the densely-populated banks of the Saône. It also would reflect the viewpoint of an artist situated on the hillside of Le Croix-Rousse, looking SW across the Saône towards Pierre-Scize making preparatory sketches. While I do believe that the 1540s Plan Scéno de Lyon achieves verisimilitude as a portrait of the city (maintains the appearance of spatial accuracy), both its scale and compass directionality are wildly inconsistent.

Geographer and urbanist Bernard Gauthiez, the de facto topographical biographer of Lyon for the past twenty years, expressed it to me thus:

“Georectify[ing] the 1544 plan [is] like mapping the Near East from the Bible… Several scales are used, and it has not been drawn from a measured survey. See my paper on it.”

Professor Gauthiez’ work on Lyon (along with the Archives Municipales’ 1990 publication) is the authoritative modern source for most of the ideas I am exploring regarding the topography and urban development of pre-modern Lyon. The written part of this Lyon project documents a new media technologist’s (my) second-hand efforts to understand, consolidate, visualize and popularize ideas that have already been developed and explored by expert scholars utilizing primary source materials. Much of that material is held in archival repositories, has not been made available on the web, and might only be comprehensible to experts regardless.

The making of Le Plan Scénographique de Lyon c.1544-1550

One of the intriguing aspects of the 1540s Plan Scéno is that the 25 segments were printed using negatively-etched (Intaglio) copper plates, and those etchings were themselves compositions based on original survey drawings. Therefore in essence the 25 map sheets are copies created through a process of mechanical reproduction. None of the original survey drawings or the engravings exist today and while it is conceivable that other copies of the map were printed, this is the only known copy.

S’agissant d’un plan gravé, autrement dit le produit d’un procédé de reproduction mécanique qui n’a d’autre raison que la multiplication d’un original, on devrait le regarder comme un exemplaire parmi d’autres. Pas plus, cependant, que l’original dessiné, aucun autre exemplaire de ce qui a été (ou aurait dû être, on ne sait) une série limitée, ne nous est parvenu. Dans pareil cas, l’exemplaire unique ou unicum prend la valeur que devrait avoir son prototype manuscrit disparu.
[Floatover shows English translation]

Jeanne-Marie Dureau, Archiviste de la Ville de Lyon,
Introduction to Le Plan de Lyon Vers 1550 (1990)

The sheets were printed on “laid paper,” made by pouring paper pulp (made from linen or cotton) into a wire frame. The Lyon Archives have identified the paper manufacturer’s shaped-wire watermark on some sheets, representing a bunch of grapes.

Date, Ornamentation and Attribution of the Map

The existent portions of the 1540s Lyon plan are undated and unsigned, but researchers have determined that the map was most likely created within the 8-year period between late 1544 and Spring 1553. It is likely that the principle survey drawings were created in 1544 (Gauthiez, 2010).
Here’s some date evidence provided that I was able to verify:

  • In the top right of the map (leaves 4 and 5) workers are depicted building a new fortification, “c’est le boulevard de la Pye ou citadelle” (Grisard 1891, p.31).  Gauthiez estimates that the map represents the progress of work on the new walls in approximately 1545.
  • On leaf 6 is depicted a “jeu de paume” (early indoor tennis) court decorated with Henri II’s crescent symbol and depicting 4 figures playing with rackets. This suggests that the map was worked on shortly before the Royal entry in September 1548. According to Oxford scholar Richard Cooper, “late in June the order was given by [Governor of Lyon] Jean de Saint-André (for the construction of a new jeu de paume at Ainay on land bought from the abbot, Cardinal Gaddi)” (Cooper, p. 18).

The map’s ornamentation clearly follows the Fontainebleau tradition (essay in Heibrunn Timeline of Art History). The imagery of the map is neoclassical rather than biblical, reflecting the Renaissance infatuation with classical imagery. It may also reflect an anti-clerical sentiment within Lyon’s secular aristocracy (Cooper, p.5). While there is no identified artist(s) signature on the map, perhaps multi-spectral imaging analysis will reveal one some day.
Through this project I have become something of an amateur enthusiast on 16th-Century French engraving – it doesn’t hurt that so much of it is now available online (hyperlink list) to augment Library holdings.

Little is known about the lives of even the most famous engravers of the 16th Century, the main evidence is in the art itself. Based on observation and the assistance of scholarship, here is a list of possible candidates for participation, artists who may have had both the ability and opportunity to create the ornamental art of the 1540s Plan Scéno de Lyon, in approximate order of likelihood.


Cartouches from Alciato’s Emblemata (Lyon 1550), signed “PV” by Eskrich (for “Pierre Vase”)

  • Pierre Eskrich, alias Pierre Vase, alias [Pierre] Cruche could have been the principal engraver of the 1540s Plan Scénographique de Lyon both for the ornamentation and the map itself.
    A Parisian who moved to Lyon around 1548, Eskrich created the woodcuts for a highly influential version of Andrea Alciato’s Emblems (a veritable cartoucherie published in Lyon in multiple editions from 1548-1551).  Of equal interest is that in 1575 Eskrich engraved a map of Paris based on the Truschet-Hoyau 1550 plan (the Truschet-Hoyau map is discussed later in this essay).  Eskritch’s map was published in Francois de Belleforest’s La Cosmographie Universelle de tout le monde (Lyon 1575), Belleforest’s book also contains cartouches stylistically similar to those shown here from Alciato’s emblemata.  Other talented artists  also contributed to La Cosmographie, and the contained Portrait of Lyon may not be by Eskritch.
  • Georges Reverdy. “GE Reverdinus fecit”?
  • Jean Mignon. There are many artistic similarities between Mignon’s work and the 1540s Plan Scéno ornamentation, and like most of the engravings attributed to Mignon, the Plan is unsigned.
  • Jacques I Androuet du Cerceau. Androuet du Cerceau was more than capable of creating both the ornamentation and the map itself (perhaps too capable). The contemporaneous and somewhat-similar Vue de la ville de Lyon en 1548 is traditionally attributed to Androuet du Cerceau – could both the 1540s Plan Scéno and the 1548 view both be his work? This intriguing possibility is undermined by Estelle Leutrat’s convincing argument that the attribution of the 1548 view to Androuet du Cerceau is highly suspect (source: Leutrat 2007 pp.99-101). Could the two works be by the same person regardless of whether it is Androuet du Cerceau?
  • Domenico del Barbieri (Fiorentino)
  • Sebastiano Serlio (recent article attributing to Serlio the design of the temporary Lyon Theatre built for Henri II’s 1548 entry)
  • Bernard Salomon
  • Antonio Fantuzzi

For more expert analysis I recommend the work of Gérard Bruyère (who wrote on the map engravings for the 1990 Archives publication), Estelle Leutrat, and the Glasgow University Emblems Website.

Coloring the Map

While the two bottom cartouches are frustratingly empty on the Lyon Archives’ printing of the map (the only existing copy), many features of the map were colored in by hand, apparently shortly after the sheets were printed. Although the pigments have faded, the roofs of houses retain their color (most are red, ecclesiastical buildings are blue). Fields were colored green and the two rivers and other bodies of water were colored a dark blue (based on various patches of color that remain).

Topographical Features: Two Hills and Two Rivers

The faded blue color of the rivers is barely noticeable after four centuries, and this makes it difficult to distinguish the two rivers from the surrounding landscape. This is very detrimental for considering the topography of a city like Lyon, which is so defined by being at the confluence of two rivers – the Saône (which flows through the center of the city) and the faster-flowing Rhône (which effectively served as the eastern border of Lyon up through the 16th century due to its unruly nature and frequent flooding). On the 1540s Plan Scéno the rivers are labeled as “LA SAONE” (female, rivière) and “LE ROSNE” (male, fleuve). The analogy between the joining of Lyon’s rivers at the confluence and the joining of a man and woman is used in the map’s imagery (see Bruyère, 1990), and is popular in both art and poetry (e.g., Délie, objet de plus haulte vertu, dizain XVII, Maurice Scêve (1544).

Distinguishing the rivers is so important for the map’s viewing that I have restored the blue of the water in Photoshop – this really brings the map back to life and makes the numerous river vessels “pop.” The color layer is non-destructive – in fact I superimposed the river engraving as well as any remnants of original color over my added semi-transparent blue layer. As the top image of this essay demonstrates, the enhanced water color can be toggled on or off based on user preference.

Here’s an example from sheet 13 which also shows how I addressed missing portions of the map for river areas such as the gap above the label for Port de Saint-Vincent [note that the image below shows an earlier too-blue waters version]:

For more historical information on Lyon and its waters:

As the altitude map above illustrates, the other defining features of Lyon’s topography are its two major hills, Fourvière (west of the Saône river) and La Croix Rousse (actually the beginning of a plateau stretching north of the low-lying Presqu’île). From our modern perspective, the scenic plan does a poor job of representing elevation, but in the mid-16th century mapmakers were still figuring that out.


I calculated the compiled Lyon map’s full dimensions to be 170cm tall by 220cm wide (5’6.82″ x 7’3.21″) based on the published sheets that I digitized [Note: the Lyon Archive confirms this: “It consists of 25 sheets each, on average, 34cm high and 44cm wide. The assembly forms a rectangle 1.70m high by 2.20m wide.”]. For comparison, the contemporaneous and similar 15-plate “Copperplate Map” of London is believed to have been 112x226cm, 67.7% the size of the Lyon map (source).

Is the 1540s Plan Scéno the largest Early Modern axonometric map? Probably not – Jacopo de Barberi’s magnificent aerial-view map of Venice (c.1500), printed from a six-piece woodcut that took him three years to make, is 134×280.8cm. I calculate that Barberi’s map is a mere 0.2 square meters larger than the Lyon map (c’est la vie, n’est pas?).

For more on de Barberi’s Venice map (and on axonometric map creation in general) I enthusiastically recommend “Digitizing a complex urban panorama in the Renaissance: The 1500 bird’s-eye view of Venice by Jacopo de’ Barbari” by Juraj Kittler and Deryck W. Holdworth (New Media & Society, August 2, 2013).

Other Similar Renaissance Maps and Digital Projects

Thanks are due to R. Burr Litchfield for aiding the above map size comparison – his Florentine Gazetteer is a great digital project (and astonishing for way-back-when in 2006). Its cartographic target is Stefano Buonsignori’s 1584 map of Florence, which is also being utilized in the University of Toronto’s newer DECIMA GIS project (as a backdrop for georeferenced data from the Florentine tax census of 1561-62, which they are inputting to a Filemaker database).

Another map that should be mentioned is Truschet and Hoyau’s “La ville, cite et universite de Paris,” which is contemporaneous (c. 1550-1552) to the 1540s Plan Scéno (c.1550). The sole known printing of the Truschet-Hoyau Paris map was rediscovered in the 1870s in Bâle, Switzerland (Cousin, 1875). The Truschet-Hoyau map printing is more complete than that of the Lyon map and available online via a fully-colored facsimile engraved and printed in 1980. This printing gives us more information on how the Lyon map might have looked if completed. The two maps share a westerly orientation, are extremely similar in engraving style, ornamentation and typeface, and warrant a closer comparison than I will give here. Perhaps the most interesting detail for this comparison is that unlike the Lyon map, the three cartouches at the bottom of the Truschet-Hoyau map are not empty – one cartouche serves as a title box, and the other two contain a celebratory poem about Paris. The most notable difference is that the Truschet-Hoyau map includes only a few undetailed figures of people and only one full vignette (the ballgame shown in the detail below) as opposed to hundreds on the Lyon map.
The Truschet-Hoyau map of Paris is composed of 8 woodcut-printed sheets and measures 0.96m high by 1.33m wide, just over one-third the size of the 1540s Plan Scéno (Source:PICPUS).


Detail from “La ville, cite et universite de Paris” by Olivier Truschet and Germain Hoyau (c.1550-52) (1980 facsimile)

Other active digital projects exploring historical city maps include

A lot of interesting work out there!

The Digital Plan Scénographique de Lyon (c.2014-15)

The two images below illustrate the high level of detail and impressive scale of the 1540s Plan Scéno. The left image is a full view of the digitally-compiled map. The red rectangle indicates the zoomed area shown in the right image. This shows that the map is not simply large but also intricate and informationally dense. The left image of the full map appears blurry, but that is because it is actually less than 1% the size of the full 2.5 gigapixel image (the right-side image here is still only 4% size!).

If I were a mathematician, I’d try to calculate how far away a person would need to be from a 2.2-meter wide object for it to appear the same size as a 0.12 meters wide photo of the map held by the viewer at arm’s length.
I’m not going to hazard it at this point (let’s just say it’s percolating – I would have to calculate its “angular size”).

My first effort to digitally compile the Plan Scénographique (Winter 2013-14) resulted in an impressive-sounding 4,900-pixels-wide image, but the actual resolution was less than 10% of the 25 full-sized segment scans I created (52.28ppi, down from 500ppi). If I had tried to compile the map using the 25 full-size TIFF images (each 7,000 pixels wide at 500ppi), my work PC computer would have crashed. This matters because my first version lacked much of the rich detail that makes the Plan so exceptional. For example, the creator(s) labels most of the streets and churches on the map but the text is illegible in the small, 52.28 pixels-per-inch version.
In April 2014, I re-compiled the map from the full-sized images utilizing a more powerful PC computer. My current version is a 2.5 gigapixel image with over 400ppi resolution, and all the writing is fully legible. At some point I will probably re-process the map a third time using slightly better scans, but the current image is more than adequate for exploring the map.

Historical Context

The Italian Wars
The period known as the French Renaissance is generally thought to have begun with the first of France’s “Italian Wars,” Charles VIII’s invasion of Italy (1494-8). Six more Italian Wars followed over the next 61 years, with France’s imperial pretensions being repeatedly thwarted by the Habsburgs of the Holy Roman Empire and Spain. I should mention that Lyon was known as the “Clé du Royaume” of France during this period, being in a strategic position between Isle-de-France (Parisian region) and the Italian alps and therefore a logistical center for military campaigns into Italy.

Lyon was the second largest city in France during the 16th Century (approximate population 80,000, compared to Paris’ population of at least 250,000) and the major trading hub of Southern France. Up until the 1550s Lyon was visited frequently by the King’s court and the base of operations for Francois I’s Italian campaigns.

Ironically Francois I (ruler of France from 1515-1547) borrowed heavily from Lyon’s expatriate community of Italian bankers to finance his military campaigns into Northern Italy. Italian merchants were also prominent in Lyon’s fairs and the silk industry, and many of their impressive residences are depicted on the 1540s Plan Scéno. Sixteenth century Lyon was truly a multi-ethnic, cosmopolitan city of strategic importance for both trade and war.

To illustrate this I put together the following quick “mashup” of major river basins in Western Europe centered on Lyon. Despite obvious imperfections, it does show that Lyon was strategically located near 5 major river systems – The Loire, Seine, Rhine, Rhone (includes Saône) and Po. One can visualize Francois I’s forces in 1524-25 embarking from Lyon towards Grenoble, across the alps at Briançon, though the Susa valley to Turin, then down the Po river towards Pavia (and defeat).


Roman Lugdunum
The 1540s Plan Scéno explicitly references Lyon’s own Roman past – almost a millenium earlier – to reflect imperial glory on the French crown and Lyon itself. Lyon was built upon the ruins of Lugdunum (c. 43BCE-192CE), the Roman Capitol of “the three Gauls” – Celtica, Belgica and Aquitania. The Roman city was mostly destroyed in the Battle of Lugdunum (197CE), the victory that solidified Emperor Septimius Severus’ control of the Roman Empire. Severus founded his own imperial dynasty, which is what the 16th Century French Kings aspired to (particularly Francois I) with questionable success.

The following cartouche (link) is from the 1540s Plan Scéno’s eighth sheet, centrally located on the hill of Fourvière, which was the heart of Lugdunum. It roughly translates to:

Here worshiped the Roman Emperor Severus, under whom so many
of the Martyrs of the Fourth and Fifth Church suffered persecution.
See the History of the Church, Book Five.

Henri II
The 1540s Plan Scéno also contains numerous symbolic references to Henri II, who ruled France from March 1547 until his premature death in June 1559. This tells us that at least the artistic, non-cartographic elements of the map were created after Henri II was crowned King of France in July 1547 (succeeding his father Francois I). While some the map elements may date to as early as 1544, the Plan Scéno was most likely completed around the time of the King’s Royal Entry into Lyon in September 1548. The artwork created for the Royal Entry contains classical imagery and symbolism extremely similar to that used in the Plan Scéno (as shown in a festival book for the entry written by the celebrated poet and humanist Maurice Scêve). Henri II’s personal emblem, the crescent moon, is pervasive in both book and map.

Scêve and the artist Bernard Salomon (whose engravings illustrate the festival book) helped orchestrate the 1548 Royal Entry itself and were assigned the task by the powerful and wealthy Archbishop of Lyon, Ippolito d’Este (later Cardinal of Ferrar). This is quite an intriguing line of inquiry as well – did these men also play a part in arranging the creation of the Plan Scéno itself? (more info.)

In July 1559, at a tournament held to celebrate the Peace of Cateau-Cambrésis that ended the last of the Italian Wars, Henri II was killed when a splinter from a broken lance flew into his visor during a joust and the injury became infected. Henri II’s teenage son Francis II inherited the throne, and as a result the politics of France were destabilized.

Death of Henri II_gistroHenriIIArmor_MET

The end of the Italian Wars did not bring peace to France. Three years after Henri II’s death, the Massacre of Vassy instigated the first of the mostly-internal French Wars of Religion between Catholics and Protestant Huguenots, which continued for almost forty years, at least until the Edict of Nantes in 1598.

In 1562, during the first War of Religion, the Protestant (Calvinist) Huguenots took over Lyon, pillaged its many Catholic churches, and demolished two – the Basilica Saint-Just and L’église Saint-Irénée, shown in the first (top-left) sheet of the 1540s Plan Scéno.  The churches were located southwest of the city walls, and the pillaged stones from Saint-Just were used to reenforce the fortifications of the city. Saint-Irénée was rebuilt on the same site in 1582.  A new Eglise Saint-Just was built, but to the north of the original site, just within the main city walls. Today the ruins of the original Saint-Just have been developed into “en jardin archéologique” (Église Saint-Just et nécropole).

The 1540s Plan Scénographique represents the city of Lyon at peace and as part of a (relatively) unified France shortly before the onset of a long period of internal strife.

Portrait of a Living City

While many similar scenic maps from the sixteenth century depict scenes of city life, those in the 1540s Plan Scénographique are more pervasive, varied and evocative than those of other axonometric city portraits that have come down to us.

The engraver peppered the map with a great many delightful little stick-figure vignettes – idealized representations depicting  everyday activities such as hunting, fishing, farming, building fortifications, bartering, dancing, and even tennis.  In addition the map features innumerable trees and numerous wild and domestic animals of various types.  Scholar Jacques Roussiaud estimates that the map shows 440 human figures (90% adult male) and 130 animals with horses and dogs being  most prevalent (Roussiaud, 1990).

The ubiquitous live vignettes are what truly distinguish the 1540s Plan Scénographique de Lyon from other similar scenic maps. These scenes from life add a powerful dynamic element, evoking an idealized era of prosperity, and inspiring curiosity in the viewer about how people lived during the now-romanticized “golden age” of mid 16th-century Lyon.

Heard melodies are sweet, but those unheard
Are sweeter; therefore, ye soft pipes, play on;
Not to the sensual ear, but, more endear’d,
Pipe to the spirit ditties of no tone:
Fair youth, beneath the trees, thou canst not leave
Thy song, nor ever can those trees be bare;
Bold Lover, never, never canst thou kiss,
Though winning near the goal yet, do not grieve;
She cannot fade, though thou hast not thy bliss,
For ever wilt thou love, and she be fair!
– John Keats, Ode to a Grecian Urn (1819)

– Andrew Taylor, 01/07/14


Other Digital Projects about Pre-Modern Lyon
An interesting GIS project would be to create a virtual 1540s Lyon based on various sources and implemented using a software platform such as Esri’s CityEngine. Many projects like this are already being worked on (most notably Lyon en 1700) so I expect a virtual pre-modern Lyon to become available online within the next decade.
[Note: The Lyon GIS project is already well underway – an authoritative, scholarly, data-driven historical project, not merely a cavalier visualization!]

Description of the map in French on the Lyon City Archives website.

A series of 25 engravings based on the 1540s Lyon plan was created and published in serial from 1872-76 as Plan scénographique de la ville de Lyon au XVIe siècle. Research by the Lyon Archives tells us that architect Léon Charvet directed the project and that it was executed by two engravers – Joanny Séon (the topographical engraver) and François Dubouchet (the ornamental engraver). Note that while the facsimile was printed at the same size as the original, it was engraved on zinc plates, whereas the 1540s Plan Scéno was engraved on copper plates.

At one point I had believed that the image shown below was of an additional (extra) 26th sheet engraved for the 1870s project – an overview image of the whole map with the missing edges reconstructed (based on the little information available from other sources).

However, my own work (and a careful viewing of the below map) disproves this – the image below was compiled from reductions of the 25 full-size engraved copies made in 1872-1876 for the “facsimile” edition. The below facsimile composite may have been made for or by Lyon’s Museum Gadagne (which has a full-size printing of the 1870s facsimile on permanent exhibition). Unfortunately the image below is too small for the street and building labels to be legible. An illegible stamp on the lower right and an accession number on top are modern archival details.


I am somewhat skeptical about the lettering on the four reconstructed sides, which don’t perfectly match what remains of the original. Only a few remnants of the edges’ lettering remain, on the first sheet (top-left).

Here is the Latin writing as shown along the edges of the 1876 facsimile:
The vertical letters:
Left side: “Pars Meridionalis” (Southern part).
Right side: “Pars Septentrionalis” (Northern part).

The horizontal letters:
Top: “Pars Occidentalis” (West Part)
Bottom: “Pars Orientalis”(East part)

These side labels may be a later addition, not a part of the original 1540s map, but we can’t know for sure either way. There are partial letters visible at the top of the first (top-left) sheet, but they do not match those of the 1872 facsimile.

An additional primary source for the 1872-76 “Facsimile” is an excellent 1698 map engraved by Nicolas-Henri Tardieu for scholar Claude-François Ménestrier. Although smaller (68x86cm, less than 1/6th the size of the original). and less detailed, the “Tardieu map” is highly derivative of the Lyon 1540s map, and at one point was even incorrectly considered the original, and the Lyon 1540s map the copy.
Unlike the 1870s reconstruction, the bottom right corner of Tardieu’s version doesn’t show the North-Northeast wind’s face, or the scroll containing “Aquilo” (the wind’s classical name) – however the 1870s version is probably more reflective of the original, as the 1540s map still contains remnants of a scroll matching those visible in the other three corners, and perhaps part of the breath emanating from the cherub’s mouth.

For a number of reasons (not the least of which is accessibility), the 1872-1876 “Facsimile” continues to be used as a surrogate for the original map, usually without any acknowledgement that the displayed image is a nineteenth-century recreation with significant differences from the original.

When the Lyon Archives published the 25 sheets in 1990, city archivist Jeanne-Marie Dureau (who oversaw the project) wrote “Historique du plan de 1550” an essay explaining how the 1872-76 facsimile came to replace the original in the public imagination. Dureau expressed the hope that the 1990 publication of the original sheets would redress this, but my own web research has unfortunately shown me that, 25 years later, the 1872-76 facsimile remains pre-eminent. The original map is now available online – through my own project and probably others as well. I’m hopeful that now scholars will often choose to use images derived from the original map rather than those of the (still impressive) 1872-1876 copy.

Dureau’s essay is now part of the Archives Municipales de Lyon’s excellent Lyon 1550 webpage that adapts the 1990 publication, includes further scholarship as well as a very low-resolution version of the full 1540s map.

Photo: Willam McAfee

Andrew Taylor standing behind the 25 sheets as restored in 1989 by Michel Guet, photographed by Jacques Gastineau and published by Archives Municipales de Lyon in 1990.

Learning something new (Interactive Programming with Python) pt.1

May 6, 2013 2 comments

I am starting Week 3 in my  nine-week Coursera class created by Rice computer science professors, An Introduction to Interactive Programming in PythonI’m enjoying it so far and recommend that anyone interested in learning programming take a look at it.

Learning something new is not really an adult thing to do!  It’s uncomfortable – most of the time we’d rather do the things we’ve done a million times before and are therefore great at.  There’s probably nothing in the world I’m better at than the work tasks I’ve been doing for 20 years, and it’s easy to forget that this is exactly why I’m good at them.

It’s hard to be patient when you feel like a blockhead, trying to pound your head through a new type of task.  Why should it take me all Saturday (with fits and starts) to finish the class project “Guess a Number”?  Answer – it takes as long as it takes, and through not taking shortcuts (or cheating in some way)  I will end up understanding the material better.

I have two advantages that help me to keep plugging through projects like this.

One is that I learned to play my first instrument (diatonic harmonica) as an adult.   I thought it would be relatively easy – it wasn’t!  However I did have a facility for the instrument (within limits) and after a few years of effort became a competent player,  an aficionado of  the great players,  and a fan of the  “Blues genre.”    The return was well worth the effort and time I invested.   The best part is that I remember not being able  to do things with a harp (colloquial American term for harmonica) at all that are now very easy.  I can’t imagine not being able to solo at all, or not having a vibrato – but I remember that it took me about four years to be able to do those things effectively, with maybe an average of 45 minutes per day at my most enthusiastic.  That’s a lot of practice time, and to become very good I’d probably have to double that effort at least (obviously I’m investing that effort in other areas now).

The other thing is that  in my field  (Information Science)  I am continually exploring  new tools (software, tech, etc.) and teaching our faculty how to best use them for their work.  Once all the professors are up to speed with a technology, a new version comes along that requires further training.  So I am continually learning to do new things and helping others learn.

I should also mention that since Christmas (inspired by reading Moonwalking with Einstein) I have successfully added 468 country locations to my long-term memory (sic) through completing a “Countries of the World” course on the Memrise website.   Now know lots non-actionable information – the names and locations of all the island chains in the South Pacific, all the countries in Africa, Central America, etcThe point of mentioning this that I successfully completed a learning project, and reminds me that if I invest effort and time I can learn new things and  develop new skills such as programming.

– Andrew Taylor

The Way of Saint James – Principal French Routes

March 27, 2013 Leave a comment

Microsoft PowerPoint - legend_4.30.pptx
[Click to enlarge]

I wanted to show and write about the above map visualization, which derives from one of  my early Google Earth-based  GIS projects (mostly created during Christmas week 2011).  I put off posting about it until now because it was inspired by a class trip to France organized and led by one of our Rice Art History professors, medieval scholar Linda Neagley.  Along with the GIS classes I took for THATCamp Texas 2011, digitizing Gothic architecture images for Professor Neagley was a big inspiration for my GIS experiments.  Medieval pilgrimage also provided a natural target for GIS visualization in Google Earth.  I’d put off mentioning my project as I was uncomfortable about focusing on Professor Neagley’s project, but she’s seen it recently and thought it was an interesting angle of perspective.

A major source of  data and knowledge for this project was  Peter Robins, a European pilgrimage enthusiast/expert and creator of The Walking Pilgrim website, “[his] contribution to the current interest in walking old pilgrim routes in W Europe. It is primarily about routes, both current and historical, which is my main interest. It’s not about spiritual guidance or any of the religious aspects of pilgrimage. It includes my routes database, information on medieval itineraries, plus my suggestions for routes to the ports of S England, and to the shrines of N Wales.”

The KML linestring data (the Ways depicted are “Real” geocoded linestrings, not drawn) my geovisualization uses do not all derive from Robins work per se, as there’s plenty of pilgrimage stuff on the web and it took some time before I realized that most of the best stuff I found was from Robins.  Given the day back again the linestrings  probably would all have come from The Walking Pilgrim,  since a few months after I began Robins generously responded to an email and explained how to download his linestrings from his website. The route distances were also adapted from Robins routes database.

I had already managed to create kml linestrings for many of the routes from based on data from various other web sources, I believe the pre-Robins routes were: le Puy, Arles, Vézeley, Aragonés and Francés.  Many derived from’s grande randonnée “Long distance Footpaths” website, for some reason they didn’t have an ideal Paris-Tours route.  for the visualization shown here I included many of  Robins other Compostela-directed pilgrimage routes as unlabeled dark-red  linestrings, partially to show other routes but also because they evoke veins of Christ’s blood going toward Compostella, and mirror the Milky Way above.

Peter Robins pointed out to me that the modern hiking paths are unlikely to have been the medieval paths – modern highways are more likely to run over the routes taken in the “moyen age.”

Pilgrimage maps from books in the Rice Library collection
While digitizing images of medieval reliquaries (the elaborate containers, as opposed to the relics, i.e. bones, True Cross piece, etc.) from the Treasures of Heaven exhibit catalog in-house for Professor Neagley’s class, I noticed that the acompanying modern map of medieval pligrimage routes from the book wasn’t very detailed and I decided to go hunting for and scanning Camino Santiago (AKA Way of Saint James) pilgrimage maps in a systematic way.

This project is pretty much over now, partially because I don’t remember the organization of all the files. The KML (Google Earth) file became so complicated that it frequently became corrupted and required lots of maintenance.

I think people have to do projects to learn how to do something – working on this one taught me a lot about Google Earth’s strengths and weaknesses as a Geohumanities platform, and about what I might want to do going forward.
– Andrew Taylor | October 24, 2014

Google Earth map of medieval architecture images

September 25, 2012 Leave a comment

Wanted to write about a successful  (it works the way I meant it to) GIS  project I did last January  in which I georeferenced ~100 password-protected photographs of French medieval architecture and made them accessible through Google Earth and Maps.   Here’s links to 2 versions of the map I generated, which  publishes well to both the Google Earth web plugin and Google Maps as it utilizes only the  Placemark and Balloon features.
If the sidebar menu of the Google Earth desktop version were necessary I would have had to replicate myself using web scripting languages such as JavaScript or Python as it isn”t available in the default Google Maps or the GE plugin platforms.

[NOTE:  Rice image management has been switched from a locally-hosted image database to ARTstor and the old database discontinued, so while the maps below still work, the pages linked to from within the maps no longer exist. The project would work the same way targeting ARTstor, however I’m not going to redo this particular project – Andrew Taylor 3/19/2014]

Rice NetID is required to link to full-sized images and metadata.   Unlike the Google Earth desktop version, Google Earth Plugin prompts users to download the images rather than opening the image automatically, I could conceivably change the code if necessary.

Google Earth Plugin version (browser-based)

Google Maps version (browser-based)

Google Earth Desktop version (must be downloaded)

Screenshots (PDF)

Since coming to  Rice University in 2010,  I’ve administered the Art History Department’s online digital image collection (~85k images total), which is currently published on “Owl-Space IMM” an MDID2-driven database located on a Rice IT server.  The images and metadata on this map derive from and hyperlink to the  IMM database records.

For copyright reasons, access to the images and metadata is password-protected.  For this project, I had to generate a KML script and then  batch-processed specific details for each separate asset from an Excel spreadsheet I generated.  The 6 fields referenced in the spreadsheet consist of basic metadata, geocodes,  links to the images and metadata in Rice’s IMM database, as well references to derivative images I created that were not password-protected (~260ppi on the longside for Fair Use, as opposed to the 3,000 ppi full-size IMM-based images).

I’ll probably discuss this further, but it worked out pretty well and could have been effectively applied to a far larger set of images.

Here’s a screenshot of how the  data and images display in  Google Earth Plugin followed by the empty KML script I batch-filled (<<[Excel field name]>>):

 Rice is currently transferring the Owl-Space IMM-based image assets to ARTstor’s Shared Shelf hosting platform at which point the IMM server will be discontinued.  I expect a similar process would work to access ARTstor-based image assets utilizing a map interface.