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Non-orthogonal raster cells and tile edge

By NGP Standards and Specifications January 2023 (approx.)
Illustration of non-orthogonality of tiles and raster pixels due to reprojection.
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Detailed Description

Illustration of non-orthogonality between digital elevation model (DEM) and tile edge due to reprojection. The green rectilinear area are the DEM pixels, the points are lidar returns, and the black line is the tile edge. 

Sources/Usage

Public Domain.