Oblique Mercator

proj-string: +proj=omerc +lat_1=45 +lat_2=55

Parameters

Central point and azimuth method

+alpha=<value>

Azimuth of centerline clockwise from north at the center point of the line. If +gamma is not given then +alpha determines the value of +gamma.

+gamma=<value>

Azimuth of centerline clockwise from north of the rectified bearing of centre line. If +alpha is not given, then +gamma is used to determine +alpha.

+lonc=<value>

Longitude of the central point.

+lat_0=<value>

Latitude of the central point.

Two point method

+lon_1=<value>

Longitude of first point.

+lat_1=<value>

Latitude of first point.

+lon_2=<value>

Longitude of second point.

+lat_2=<value>

Latitude of second point.

Optional

+no_rot

Do not rotate axis.

+no_off

Do not offset origin to center of projection.

+k_0=<value>

Scale factor. Determines scale factor used in the projection.

Defaults to 1.0.

+lon_0=<value>

Longitude of projection center.

Defaults to 0.0.

+x_0=<value>

False easting.

Defaults to 0.0.

+y_0=<value>

False northing.

Defaults to 0.0.