“Deep End of the Pool” Mapping Challenge

  • Find a dataset from Data.gov. You’ll want to select data that has geospatial info, is in CSV format, and uses points (ie, specific locations) rather than boundaries. Look for data with latitude and longitude coordinates.
  • Download the dataset and upload it into Carto, so that you have a data map that looks something like this
  • You might also want to use Carto’s edit layer option to customize the size, label the data, adjust it by value, etc. Make it look good!
  • In MapWarper, select a georeferenced map of the same location as your data. Use the “Browse Rectified Maps” tab.
  • After selecting a map, you’ll need to add 1-2 additional control points to it, and “Warp” (georectify) the map. To do so, follow the screencast below
  • Return to Carto, and select the “Basemap” button in the column to the left of your map.
  • Under “Source”, select the map icon, then under “Style” click the blue plus sign.
  • Carto will then ask for your XYZ url. Go back to your Mapwarper map, and copy the full URL and paste it into the box on Carto. DO NOT check the “TMS” box beside the URL. Finally, click the blue “Add Basemap” button at the bottom of the screen.
  • Cross your fingers, think happy thoughts, wish upon a star…
  • Do a happy dance

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  • Ahh, but you’re not quite finished, grasshopper. This map you’ve made is cool, but how do we get it out of Carto for the world to see?
  • In Carto, from the main map Dashboard, click “Publish”
  • Copy the Embed code for your map, and also make sure the Privacy settings for your map are set to “Public”
  • On your WordPress blog post, select the new block type “Custom HTML.” You may need to expand your menu or search for it.
  • Paste in the Embed code from Carto. Then click “Update” or “Preview” on your WordPress toolbar. You should end up with your map now embedded into your WordPress blog, with a historic map baselayer, looking like a million bucks.
  • Now it’s time for the real happy dance. You did it!

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  • In addition to your map, write a brief blog post explaining what data you selected, and what historic map you selected. Does the combined map you create suggest any questions, or give any particular insights we might think about? What challenges did you have to overcome to produce this map? Did accomplishing it give you greater confidence in your ability to use historical data in new ways?
  • Blog post should be published by Thursday, April 8.
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