Suggested edit to documentation

[JimShady]

https://sedona.apache.org/1.5.1/api/sql/Raster-loader/#rs_makeemptyraster

When making a global raster using, for example, WGS84, the pixel size on the y axis should be specified as a negative number. I think this is a 'gotcha' and should be explicitly explained?

For example:

SELECT RS_MakeEmptyRaster(1, -- bands
                          'I', -- datatype
                          360, -- width
                          180, -- height
                          -180, -- upperlefx
                          90, -- upperlefty
                          1, -- scalex (pixel size)
                          **-1, -- scaley (pixel size)**
                          0.0, -- skewx
                          0.0, -- skewy
                          4326) -- srid

[jiayuasu]

@Kontinuation Do you know why the pixel size on Y (scaleY) can be negative?

[Kontinuation]

The pixels with lower Y grid/pixel coordinate is mapped to larger Y value of map coordinate, so a negative scaleY indicates a north-up image, which is the most common case.

scaley is actually an element of the affine transformation matrix, it should not be treated as the pixel size. So yes, the documentation is quite misleading.