Viewshed – Seeking Map Provider for Viewshed Analysis

Question

I'm looking for a map provider that can provide viewshed analysis where I can drop a marker with a specific height and the map would show me the visible and non-visible areas within a specific radius. Something like this: Viewshed Documentation – Code Sample.

Is there any open source map provider like OpenStreetMap that can provide a similar feature?

The link above is from ArcGIS but that's not free.

Answer 1

You can do that with your own DEM and offline by using gdal_viewshed https://gdal.org/programs/gdal_viewshed.html.