Atlas of the Historical Geography of the United States
▻http://dsl.richmond.edu/historicalatlas
via FlowingData as usual...
In 1932, Charles O. Paullin and John K. Wright published Atlas of the Historical Geography of the United States, a reference of almost 700 maps about a varied set of topics, such as weather, travel, and population. The Digital Scholarship Lab at the University of Richmond brought the atlas to digital life.
https://dl.dropbox.com/s/yhki3gzs2zdgk5p/digitatlas%20etatsunis.png
In this digital edition we’ve tried to bring—hopefully unobtrusively and respectfully—Paullin and Wright’s maps a bit closer to that ideal. First, with the exception of the historical maps from the cartography section and a handful of others (those that used polar projections, for example), we’ve georeferenced and georectified all of the maps from the atlas so that they can be overlaid consistently within a digital mapping environment. (Georeferencing is a process of linking points on a map to geographic coordinates, and georectification is a process of warping a map using those coordinates to properly align it within a particular projection, here web mercator.) High-quality scans of all of the maps as they appeared on the plates are available too.
Not only are the maps overlaid on a slippy map, but the lab also added simple interactions with tool tips and animation so you can look more specifically at the data.
#atlas #cartographie #visualisation #cartographie_historique #sémiologie #perception #imaginaire #états-unis