This will legitimately produce no output unless your raster tiles are around 0 N,0 E Self Explanatory for most of it but the filter polygon does need to be in the same projection that the raster inputs are. In general, this happens on any geometry that isn't a Polygon. This should warn you and not apply a filter. Rewrite all my Geometric Functions to handle 3D geometries and measures. Strip all Z/M geometries and turn them into regular geometries Reject any Z/M geometries (what it does now) There's 3 options and I went with the easiest: There's a number of other issues with the geometry like being twice as large in computer memory, twice as large on your computer (which is a problem with a limited size format like SHP), twice as long to read, and substantially longer to use any GIS functions on. Since Z and M are unused by my application and M is pretty much unused by every GIS application in the universe, I don't bother to process these. Some applications have decided to start exporting PolygonZ shapefiles rather than Polygon shapefiles by default. The potential problems (ignoring standard raster issues because he gets it working with other methods): Trevor, I don't think that's his problem.įor the Raster Filter, the attribution is irrelevant. Any raster tile touching or contained within the polygon will be included in the end result. It must both have valid imagery and be in the shapefile extents if a shapefile is provided. The best way to think of this is the shapefile is a filter.any area that wouldn't have raster generated won't have raster generated just because it intersects with the polygon. This shapefile can contain any number of polygon features. I then used an internal process to break down the imagery just to show what is actually created. I set a shapefile with the extents I wanted to capture. In my sample process, I processed 256m to 8192m resolution all in one run. It could even be an image with nothing but a base color. This could be Blue Marble, some variation on LandSat7, or whatever your satellite imagery preference is. In order to fully remove black borders, you'll generally want to use a base raster layer in addition to your raster data. This method is the recommended mode for addressing this. This option is used to target raster tiles and avoid black borders as well as keep data sizes in check. From seeing a lot of non ideal practice being recommended as an ideal work around, this is a quick tutorial on one of the raster advanced options.
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