Sub Pixel Accuracy for Raster Buffer Processing
summary
Stores geotiff origin plus x/y resolution and build an affine transform to map lat/long to subpixel floating coordinates (example: a 5m×5m pixel gives a float x,y inside that cell). Using nearest neighbor means floor(x),floor(y) to index the 1D raster array, but code must keep the float coords for reprojection and resampling. For DEMs use pixel-is-point to produce a terrain mesh that can be draped with imagery.
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