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For our project, we are exploring Terrain and Satellite maps using Leaflet.js

While exploring the Internet got this OpenTopoMap. However, not sure whether this is a Terrain Map.

For Satellite got this Esri.WorldImagery. However, as the map source is https://server.arcgisonline.com don't know whether these are open source maps or paid maps.

Also, is there any open source basemap like OSM for Terrain and Satellite maps?

Taras
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shoab
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    Related question: https://gis.stackexchange.com/questions/7860/are-there-open-access-terrain-tiles-with-a-permissive-license-like-osm – cmrRose Apr 29 '19 at 21:40
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    Do you need the entire world? Or just a particular area? The reason I ask is that some basemaps are only available for the United States. – cmrRose Apr 29 '19 at 21:41

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According to this article Esri World Imagery can be used free of cost when all of the following conditions are met:

  1. You have signed up for a free ArcGIS Developer account
  2. You are not generating revenue from your app (in the form of advertisements or subscriptions)
  3. Your users request < 1 million tiles/month
  4. You properly attribute both Esri and all of our data providers
NettaB
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