XML header

With CSV grid files, you need values for CellSize and for CellReference, the position of the reference point.

Your data provider should give you the values.

Field Description
CellSize The spatial resolutions of the grid in decimal degrees.
CellReference Defines the part of the cell (pixel) that the lat/long coordinates represent. Valid values are Center, LowerLeft, LowerRight, UpperLeft, and UpperRight.