| -J (upper case for width, lower case for scale) Map projection |
| -JAlon0/lat0[/horizon]/width |
Lambert azimuthal equal area |
| -JBlon0/lat0/lat1/lat2width |
Albers conic equal area |
| -JClon0/lat0width |
Cassini cylindrical |
| -JCyl_stere/[lon0[/lat0/]]width |
Cylindrical stereographic |
| -JDlon0/lat0/lat1/lat2width |
Equidistant conic |
| -JElon0/lat0[/horizon]/width |
Azimuthal equidistant |
| -JFlon0/lat0[/horizon]/width |
Azimuthal gnomonic |
| -JGlon0/lat0[/horizon]/width |
Azimuthal orthographic |
| -JGlon0/lat0alt/azim/tilt/twist/W/H/width |
General perspective |
| -JHlon0width |
Hammer equal area |
| -JIlon0width |
Sinusoidal equal area |
| -JJlon0width |
Miller cylindrical |
| -JKflon0width |
Eckert IV equal area |
| -JKslon0width |
Eckert VI equal area |
| -JLlon0/lat0/lat1/lat2width |
Lambert conic conformal |
| -JM[lon0[/lat0/]]width |
Mercator cylindrical |
| -JN[lon0/]width |
Robinson |
| -JOalon0/lat0azim/width |
Oblique Mercator, 1: origin and azimuth |
| -JOblon0/lat0/lon1/lat1width |
Oblique Mercator, 2: two points |
| -JOclon0/lat0/lonp/latpwidth |
Oblique Mercator, 3: origin and pole |
| -JP[a]width[/origin] |
Polar [azimuthal] (\theta, r) (or cylindrical) |
| -JPoly[lon0[/lat0/]]width |
(American) polyconic |
| -JQ[lon0[/lat0/]]width |
Equidistant cylindrical |
| -JR[lon0/]width |
Winkel Tripel |
| -JSlon0/lat0[/horizon]/width |
General stereographic |
| -JT[lon0[/lat0/]]width |
Transverse Mercator |
| -JUzone/width |
Universal Transverse Mercator (UTM) |
| -JV[lon0/]width |
Van der Grinten |
| -JW[lon0/]width |
Mollweide |
| -JXwidth[l|pexp|T|t][/height[l|pexp|T|t]][d] |
Linear, log_{10}, x^a-y^b, and time |
| -JYlon0/lat0width |
Cylindrical equal area |