PixelInCell standard values
The origin of the image coordinate system is at the centre of a grid cell or image pixel.
urn:ogc:def:pixelInCell:OGC:1.0:cellCenter
The origin of the image coordinate system is at the corner of a grid cell, or half-way between the centres of adjacent image pixels.
urn:ogc:def:pixelInCell:OGC:1.0:cellCorner