furqaankhan commented on code in PR #1011:
URL: https://github.com/apache/sedona/pull/1011#discussion_r1319283735
##########
common/src/main/java/org/apache/sedona/common/raster/RasterConstructors.java:
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@@ -45,6 +55,94 @@ public static GridCoverage2D fromGeoTiff(byte[] bytes)
throws IOException {
return geoTiffReader.read(null);
}
+ /**
+ * Returns a raster that is converted from the geometry provided.
+ * @param geom The geometry to convert
+ * @param raster The reference raster
+ * @param pixelType The data type of pixel/cell of resultant raster
+ * @param value The value of the pixel of the resultant raster
+ * @param noDataValue The noDataValue of the resultant raster
+ *
+ * @return Rasterized Geometry
+ * @throws FactoryException
+ */
+ public static GridCoverage2D asRaster(Geometry geom, GridCoverage2D
raster, String pixelType, double value, Double noDataValue) throws
FactoryException {
+
+ DefaultFeatureCollection featureCollection =
getFeatureCollection(geom, raster.getCoordinateReferenceSystem());
+
+
+ double[] metadata = RasterAccessors.metadata(raster);
+ // The current implementation doesn't support rasters with properties
below
+ // It is not a problem as most rasters don't have these properties
+ // ScaleX < 0
+ if (metadata[4] < 0) {
+ throw new IllegalArgumentException(String.format("ScaleX %f of the
raster is negative, it should be positive", metadata[4]));
+ }
+ // ScaleY > 0
+ if (metadata[5] > 0) {
Review Comment:
If the ScaleX < 0 and ScaleY > 0 then we would have to flip the raster. To
keep the function simple, we decided to not do it for now. I consulted Kristin
on this.
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