#2096: oldmaps, photos, water
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The old Madrid map comparator allows you to view and compare side by side in two or more windows 10 maps between 1622 and 1940 and make measurements and annotations
https://visualizadores.ign.es/planos_antiguos/ -
A web application to prepare photographs without leaving home allows you to choose the location of the camera (and the type and optics) and the subject and predict shadows and golden and blue hours according to the date
http://pictureprep.appspot.com -
The NHDPlus HR is a geospatial dataset representing the flow of water across US landscapes and through the hydrographic network created by the USGS
https://www.esri.com/arcgis-blog/products/arcgis-living-atlas/water/the-most-detailed-map-of-us-waters-that-youve-ever-seen/
Raf