# spottopgm > Convert a SPOT satellite image to PGM format. > More information: . - Convert the specified SPOT image to PGM format: `spottopgm {{path/to/file.spot}} > {{path/to/output.pgm}}` - Extract the specified color channel: `spottopgm -{{1|2|3}} {{path/to/file.spot}} > {{path/to/output.pgm}}` - Extract the specified rectangle from the input image: `spottopgm {{first_col first_row last_col last_row}} {{path/to/file.spot}} > {{path/to/output.pgm}}`