If the link cannot be opened, here is a screenshot of my project.
For this project, I had the opportunity to georectify a historic map of Northfield, Minnesota, from 1968. This process involved overlaying the old map onto a modern coordinate system, aligning it with present-day geographic data.
At first, I assumed georectification would be a straightforward task—just matching old streets to new ones. However, I quickly realized that historical maps often include distortions, outdated landmarks, or missing details that don’t align perfectly with modern maps. Streets may have changed names, buildings may have been demolished or replaced, and entire neighborhoods may have evolved. The process required careful attention to detail, selecting accurate control points (key locations that appear on both the historical and modern maps) to minimize errors.
Going through this hands-on experience deepened my understanding of spatial digital humanities projects. Previously, I had seen georeferenced maps in online exhibits and assumed they were automatically processed. Now, I appreciate the manual effort involved, as well as the decisions researchers make when trying to balance historical accuracy with modern spatial frameworks.
After completing the georectification, I explored the “This Map” page, which offers various formats for accessing the rectified map. These include: GeoTIFF (A geospatially referenced image file useful for GIS software), Web Map Tile Service (WMTS) (Allows for seamless integration into web-based mapping applications), and KML (Google Earth) (Enables users to overlay the map on Google Earth).
Once a historic map is georectified, the possibilities for research and analysis expand significantly. For example, researchers can: compare urban growth and land use changes over time, identify long-term trends in infrastructure development, or overlay demographic or economic data to study historical patterns. The next steps could include adding layers of additional data, such as census records, archival photographs, or contemporary GIS datasets. By integrating more sources, georectified maps can serve as the foundation for interactive storytelling and historical analysis.
While georeferencing is a powerful method, it does come with challenges. The accuracy of the process depends on the quality of the original map and the selection of control points. Distorted or hand-drawn maps may not align well with modern grids. Additionally, historical maps often reflect the biases of their time, omitting marginalized communities or misrepresenting certain areas. While georectified maps are great for spatial analysis, they are not always the best tool for every research question.
2 thoughts on “Blog 6”
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Great job Chloe! I appreciate your point about how human error, distortion, and changes overtime create a need for manual georeferencing. I found similar differences between the 1855 historical map of Northfield I georeferenced on the modern coordinate system and map. The possibilities of georectification for research and analysis you describe sound very interesting. At the same time, I appreciate how you make a distinction between how georeferencing enhances quantitative storytelling (perhaps in economics or demographics) and is less useful for analyzing qualitative sides of history (personal narratives or oral histories).
You’re so right about the outdated landmarks and things like construction and destruction that change the landscape! Since my map was on a country scale, I didn’t come across those issues, so I’m glad you brought that up! Having to work around all those obstacles truly does give a deeper appreciation for all the work that goes in. I had some trouble getting the overlayed map to be distorted in the right way to cover the entire landmass, so I had to go back multiple times to add more points and try again. This was a fun project, but I have to agree that there are many limitations to the research questions you can answer with GIS alone. Great work!!