The publication dates of the maps can be limited by adjusting the slider scale underneath the text box to set the upper and lower limits of the years to search within. Searching for historical maps can be done either by typing in a place name or adjusting the zoom and pan levels on the map itself. The map component of the search interfaced is stylized to evoke the feeling of looking at an old map with grainy features. OldMapsOnline is a collaborative project between The Great Britain Historical GIS Project based at The University of Portsmouth, UK and Klokan Technologies GmbH, Switzerland. Collections from around the world will continue to be added throughout 2012. All collections added are from sites that offer high resolution historical scanned maps that have been already georeferenced and are viewable online without requiring logins or payments from the viewer. Current collections include the David Ramsey Collection, the British Library, the Moravian Library, and the National Library of Scotland. Old Maps Online is a portal that allows the user to search geographically for historical maps housed via some of the largest online map collections. Now, the site Old Maps Online, has made finding those maps a whole lot easier. With free applications like Harvard’s WorldMap Warp, uploading and georeferencing maps is easier than ever.įinding scanned historical maps can be a bit cumbersome. Historical GIS is also used to compare changes in a geographic area over time by comparing data extracted from maps covering a range of years. Pastmapper is a project that digitizes historical maps in order to recreate the state of cities over the course of one year intervals. David Ramsey popularized the method of georectifying historical maps and draping those maps over a DEM to create a 3D view. The use of extracting data from old paper maps is growing in popularity as a method to understanding historical geography.
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