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Adjacent DEM files have narrow triangular gaps when joined

Newbie here. I've downloaded several DEM files from GeoCommunity which correspond to adjacent regions. When I join them together to form a larger relief map there are triangular 'gaps' on all four ...
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19 views

How to access the USGS Small Scale Shaded Relief from a client application?

I am writing a Java client application that needs to make use of USGS Small Scale Shaded Relief images served as tiles. The supported interfaces are REST SOAP WMS as described at the bottom of that ...