Device coordinates depends on raster format:
| SIZE OF THE RASTER IMAGE | |
| RLE | defined by %rs |
| EPSON | defined by %rs |
| TEKTRONIX | defined by %rs |
| LASERJET | 1440 * resolution / 180 |
| PAINTJET | resolution * paper sizepaper size = 7.6*10.8 inches |
Resolution is the number of dot per inch the driver can generate. It is given, for each driver, in the workstation type list. By default, GPHIGS generates a 512x512 raster image for drivers which uses %rs.