| -J (lower case for scale only) Map projection |
| -Jaea/lon0/lat0/lat1/lat2/scale |
Albers conic equal area |
| -Jaeqd/lon0/lat0[/horizon]/scale |
Azimuthal equidistant |
| -Jcass/lon0/lat0/scale |
Cassini cylindrical |
| -Jcea/lon0/lat0/scale |
Cylindrical equal area |
| -Jcyl_stere/[lon0[/lat0/]]scale |
Cylindrical stereographic |
| -Jeqc/[lon0[/lat0/]]scale |
Equidistant cylindrical |
| -Jeqdc/lon0/lat0/lat1/lat2/scale |
Equidistant conic |
| -Jgnom/lon0/lat0[/horizon]/scale |
Azimuthal gnomonic |
| -Jhammer/lon0/scale |
Hammer equal area |
| -Jeck4/lon0/scale |
Eckert IV equal area |
| -Jeck6/lon0/scale |
Eckert VI equal area |
| -Jlaea/lon0/lat0[/horizon]/scale |
Lambert azimuthal equal area |
| -Jlcc/lon0/lat0/lat1/lat2/scale |
Lambert conic conformal |
| -Jmerc/[lon0[/lat0/]]scale |
Mercator cylindrical |
| -Jmill/lon0/scale |
Miller cylindrical |
| -Jmoll/[lon0/]scale |
Mollweide |
| -Jnsper/lon0/lat0alt/azim/tilt/twist/W/H/scale |
General perspective |
| -Jomerc/lon0/lat0azim/scale |
Oblique Mercator, 1: origin and azimuth |
| -Jomerc/lon0/lat0/lon1/lat1/scale |
Oblique Mercator, 2: two points |
| -Jomercp/:lon0/lat0/lonp/latp/scale |
Oblique Mercator, 3: origin and pole |
| -Jortho/lon0/lat0[/horizon]/scale |
Azimuthal orthographic |
| -Jpolar/[a]scale[/origin] |
Polar [azimuthal] (\(\theta, r\)) (or cylindrical) |
| -Jpoly/[lon0[/lat0/]]scale |
(American) polyconic |
| -Jrobin/[lon0/]scale |
Robinson |
| -Jsinu/lat0/scale |
Sinusoidal equal area |
| -Jstere/lon0/lat0[/horizon]/scale |
General stereographic |
| -Jtmerc/[lon0[/lat0/]]scale |
Transverse Mercator |
| -Jutm/zone/scale |
Universal Transverse Mercator (UTM) |
| -Jvandg/[lon0/]scale |
Van der Grinten |
| -Jwintri/[lon0/]scale |
Winkel Tripel |
| -Jxyxscale[l|pexp|T|t][/yscale[l|pexp|T|t]][d] |
Linear, log\(_{10}\), \(x^a-y^b\), and time |