[PR] feat: make rasterization orientation-agnostic by supporting positive scaleY [sedona]

["prantogg (via GitHub)" <gi...@apache.org>]

prantogg opened a new pull request, #2961:
URL: https://github.com/apache/sedona/pull/2961

   ## Summary
   
   Makes `RS_AsRaster` and related rasterization functions work correctly with bottom-up rasters (positive scaleY), which are common in formats like BMP and certain GeoTIFF configurations.
   
   ### Changes
   
   - **Rasterization.java**: Detect bottom-up orientation via `RasterizationParams.bottomUp` flag; flip rasterized pixels vertically after rasterization so output matches the requested grid orientation. Updated scanline Y calculations to use helper methods.
   - **RasterUtils.java**: Added `getRasterUpperLeftY`, `getRasterScaleY`, `flipVerticallyPixelSpace`, and `flipVerticallyGridSpace` utility methods.
   - **RS_AsRaster.md**: Removed the `ScaleY must be negative` restriction from documentation.
   - **Tests**: Added bottom-up rasterization tests across `RasterizationTests`, `RasterBandAccessorsTest`, `RasterBandEditorsTest`, `RasterConstructorsTest`, and `RasterUtilsTest`.
   
   ### Approach
   
   When a raster has positive scaleY (bottom-up), the rasterization pipeline normalizes it to top-down internally (negating scaleY, adjusting upperLeftY), performs rasterization as usual, then flips the result back to match the original bottom-up orientation. This keeps the core rasterization logic unchanged while transparently supporting both orientations.


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Re: [PR] [SEDONA-754] feat: make rasterization orientation-agnostic by supporting positive scaleY [sedona]

["jiayuasu (via GitHub)" <gi...@apache.org>]

jiayuasu merged PR #2961:
URL: https://github.com/apache/sedona/pull/2961


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