https://www.oldmapsonline.org/compare#739414168834
There are many reasons why one would use a georectified map and in multiple different sectors. The main reason is to gain insight to the spatial context over time. So, in this georectified map I am comparing Northfield in 1905 to now. By overlaying historical maps with modern geographic data, I can discern changes in land use, urban expansion, and infrastructure development. One thing I noticed is how much Carleton has changed over time. In 1905, there was only the Scoville Memorial Library, Willis Hall, Museum, Gridley Hall, Laird Science Hall, and Observatory. Now, Carleton has expanded its infrastructure to much more of that area. A lot of the squares in Northfield were also empty, meaning that there were less houses and more empty areas. Now, Northfield is a filled residential community. Once you make a georectified, the next steps are to analyze the differences stated before. One problem is the accuracy of the historical maps. Map makers had a lot less technology and information available than we have now, so there may be discrepancies and inaccuracies between maps. Understanding the context, purpose, and potential distortions are essential. First, you need to comprehend the time period of when the made was made so you have more information on the conditions from that time period. Understanding the purpose will give insight into the data it contains and how you can interpret it. For example, in the Northfield map, the purpose was to show land ownership. Once we understand that, we can comprehend the data that comes with it. This exercise changed how I view spatial DH projects from before. I have a greater appreciation for the little details when it comes to mapping projects. You have to be very precise because if you are a little bit off, it will dislocate the map.
4 thoughts on “Blog 6 Jacob Ventura”
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Your commentary on investigating spacial context over time is very interesting and not something I had thought of. There is a lot of information that can be gleaned by overlaying an old map onto a modern one. Information on land of course, but also the people who lived there then and who live there now. What people needed then is different than what people need now. I also agree that understanding potential distortions is extremely important.
Indeed, the comparison between georectified historical maps and contemporary geographic data provides valuable insights into changes over time. Yet, as you smartly mention, working with historical map data could definitely present challenges. As in, these maps may contain inaccuracies due to the limited technology and data available at the time of their creation.
Indeed, the comparison between georectified historical maps and modern geographic data provides valuable insights into how any certain area changes over time. Yet, as you smartly mention, working with historical map data could definitely present challenges. As in, these maps may contain inaccuracies because of the obsolete technology and data available at the time of their creation.
I love how you used a similar georectification method to compare historical maps with modern data as mine, revealing changes in Northfield’s urban landscape over time, particularly highlighting Carleton College’s expansion. I resonate with their emphasis on precision in mapping, as even slight inaccuracies can significantly affect the map’s spatial accuracy and the insights it can provide.