Tutorial overview

What will we cover in the tutorial?

  • Importing GeoTiff file
  • Creating labels, attributes, and global attributes
  • Annotate areas of the city that may be affected by flood
  • Apply attributes to give more information about the annotated area (resident area, park, etc.)
  • Apply global attributes (probability of the area being affected by flood from 1 to 5)
  • Export data to JSON file


  • Installed Diffgram or account on diffgram.com
  • GeoTiff file for annotation (if you want to follow along - we will be using this file)
  • (Optional) MapTiler account