by Jack Dougherty, Stacy Lam, and David Tatem, last updated March 30, 2017
Interactive web maps are made up of different layers, such as background basemaps, colored or shaded polygons, and/or colored point markers. This chapter describes how to transform your data into layers that you can upload into online map tools and templates. Specifically, you will learn how to:
- Geocode locations into coordinates with US Census or Google
- Pivot address-level point data into polygon data
- Normalize data to create more meaningful polygon maps
- Convert map data with GeoJSON.io or Mapshaper.org
- Join spreadsheets and polygon boundaries with MapShaper.org
- Upload GeoJSON Data to a Leaflet Map template on GitHub
- Pull open repository data into a Leaflet map with APIs
Enroll in our free online course, which introduces these topics in the brief video below, and offers more exercises and opportunities to interact with instructors and other learners.
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