Du texte à la carte : le cadastre de Saint-Chamas

Du texte à la carte : le cadastre de Saint-Chamas

🎙 Clément Marquez, Sylvie Perrin-Toinin 👥 46K 📅 June 20, 2026 ⏱ 15 min 👁 39 📄 original study 🧭 2026-08-15
Available in: English (current) Français

Keywords

cadastrehistorical GISSaint-ChamasNapoleonic cadastreland register

Summary

This presentation by Clément Marquez and Sylvie Perrin-Toinin from Université Bretagne Sud demonstrates a methodology for converting historical textual land records into a cartographic representation using GIS. They focus on the parish land register (parcellaire) of Saint-Chamas from 1700 and the Napoleonic cadastre from 1819. The parcellaire is a fiscal document listing property owners, land use, and measurements in Provençal units (canne and pan). The Napoleonic cadastre, established by law in 1807, provides more detailed and georeferenced maps. The speakers explain how they digitized the textual data into Excel, then georeferenced the Napoleonic cadastre using stable landmarks like the church and port, and finally traced parcels manually in QGIS. They discuss the challenges of reconciling the two sources and the potential for analyzing historical property, wealth, and social structures. They also cite previous works by Nicolas Poirier and others as precedents. The presentation highlights the value of integrating geographical data from historical sources to enable spatial and statistical analysis.

159 words

Critical Evaluation

Value of the Information & Strength of the Argument

The value of the information is high for historians and researchers interested in historical GIS and micro-history. The presentation provides a concrete example of how to transform textual records into spatial data, enabling new analyses of property, wealth distribution, and social structures. The argumentation is solid, as they explain each step of their methodology, from data extraction to georeferencing and parcel tracing. They also acknowledge limitations, such as the margin of error in their tracings, which adds credibility. However, the presentation is more of a case study than a comprehensive methodological guide, and some technical details are glossed over.

Scientific Rigor, Source Quality, Title Accuracy

The scientific rigor is evident in their use of primary sources (the 1700 parcellaire and the 1819 Napoleonic cadastre) and their transparent methodology. They cite previous works by Nicolas Poirier and others, though not with formal citations. The title accurately reflects the content, which focuses on the transformation of textual records into a map. The presentation is well-structured and the speakers demonstrate expertise in both historical research and GIS. However, the lack of formal references and the informal presentation style slightly reduce the perceived rigor.

199 words

Title / Content Match

The title accurately reflects the content, which focuses on transforming textual historical records into a cartographic representation.

Quality & Reliability

7/10

The presentation is based on primary historical documents (parish land register and Napoleonic cadastre) and demonstrates a rigorous methodology for georeferencing and integrating them into a GIS. The speakers are transparent about their methods and margins of error. However, the lack of formal citations and the informal presentation style limit the score.

Key Moments

Cited Sources

  • Parcellaire de Saint-Chamas (1700) — Primary source: parish land register of Saint-Chamas from 1700.
  • Cadastre napoléonien de Saint-Chamas (1819) — Primary source: Napoleonic cadastre of Saint-Chamas from 1819.
  • Travaux de Nicolas Poirier — Previous work on land use changes using the Napoleonic cadastre.

Concurring Sources

  • Nicolas Poirier's work on land use changes — Cited as a precedent for using the Napoleonic cadastre to study agricultural changes.

Contribution & Novelties

The presentation offers a practical example of integrating historical textual records into a GIS, demonstrating a replicable methodology for other historical studies. It highlights the potential of such approaches to uncover spatial patterns in property ownership and social structures. The authors also contribute to the growing field of historical GIS by providing a case study that bridges the gap between archival research and spatial analysis.

Pour aller plus loin :

  • Historical GIS — Overview of the field and its applications.
  • QGIS — Open-source GIS software used in the presentation.
  • Napoleonic Cadastre — Background on the French cadastre system.

98 words

Radar Profile

The radar profile shows high scores in information quality and reliability, reflecting the use of primary sources and transparent methodology. The technical level is moderate, indicating that the content is accessible to a general audience but still provides technical details. The quantity of information is good, but the presentation could be more comprehensive.

Reliability 7/10