For our purposes, it will allow us to build historical map layers, which we can use to examine changes in space and place over time.<\/p>\n
1. Open Map Warper<\/a> and create a new account. (Yes, another one!)<\/p>\n 2. Upload a high-resolution map. To test this tool, try one of the selected historical maps of Washington, D.C. from the David Rumsey Map Collection or use a map from your collection.<\/p>\n 3. Click \u201cExport\u201d and download the highest resolution image.<\/p>\n 4. In the Map Warper window, click to \u201cUpload Map.\u201d Enter metadata and click to \u201cCreate.\u201d 5. Click the \u201cRectify\u201d tab. In the side-by-side interface, you can navigate between each map using the mapping tools on the left. In both map windows, navigate to Washington, D.C.<\/p>\n 6. Locate shared points on each map. Use the controls at the top right to add and modify Control Points on each map. (Note: You should add at least three points to rectify. Focus on locating points across the map- not in one single area)<\/p>\n <\/p>\n 7. After you have added points, click \u201cWarp Image.\u201d Click the \u201cPreview Map\u201d tab. A \u201cTransparency\u201d slider will allow you to compare the two maps in your window. (Note: you can return to the \u201cRectify\u201d tab to add\/edit points to improve your results.)\n
![\"\"](\"http:\/\/locallinkages.org\/wp-content\/uploads\/2019\/01\/Mapwarper1.png\")
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![\"\"](\"http:\/\/locallinkages.org\/wp-content\/uploads\/2019\/01\/Mapwarper2.png\")
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![\"\"](\"http:\/\/locallinkages.org\/wp-content\/uploads\/2019\/01\/Mapwarper3.png\")
<\/a><\/p>\n![\"\"](\"http:\/\/locallinkages.org\/wp-content\/uploads\/2019\/01\/Mapwarper4.png\")
<\/a><\/p>\nUsing the map<\/strong><\/h4>\n
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