3.4. Is the CGM data “Pixel node registered” or “Gridline node registered”?

Like most InSAR imagery, the CGM product is pixel node registered. The values for x-axis and y-axis arrays (if reading in Python and Matlab) are considered to be the center of each pixel. Each .grd file extracted from the HDF5 should be pixel node registered to avoid the loss of half a pixel on each edge. For term definitions, see https://docs.generic-mapping-tools.org/latest/reference/options.html#grid-registration-the-r-option.