crop a rectangle out of a mapImage
Crops the image, the map that travels with it, and moves the origin so the geometry still says where the remaining pixels are. Nothing is resampled.
Syntax
mg = subGrid(mg,rows,cols)
mg = subGrid(mg,mask)Input
| mg | mapImage |
| rows, cols | index vectors, contiguous and ascending |
| mask | logical over the grid; its bounding box is taken |
Output
| mg | mapImage |