[gdal-dev] Warp Reprojection A UTM NASD Projection into Missouri State Plane Western or Central leaves Gap Artifacts in the Tile Edges due to Distortion

[Mike Stanton]

Reprojecting shows a calculation error in the warping of a UTM Projection to a Missouri State Plane West or Central projection.  The manifestation is a series of crosshatch marks where the the tile Corners are and/or a black grid around all  the tiles in the data set, which is dependent on the zoom level being viewed.  Calculating the extents of the images shows the original image has a 256 meter size per tile but the reprojected tile has a 257.5~ meter extent even though the number of pixels is less in the southwest corners of the pictures probably due to the reprojected dimensions of the pixels.  The GSD of the pixels is for the reprojection is Pixel Size =  0.07935516222505510642 Original 0.07933064766036569682  as shown in the QGIS properties display.  When shown with nodata being white it renders as white flecks in Black it shows as a black grid.  I have a sample of four images from two columns and the set of calculations for one image from the UTM and the MSP_Central reproject.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/gdal-dev/attachments/20220709/b5ee4527/attachment.htm>