# Laborde Oblique Mercator

Name | Laborde Oblique Mercator
EPSG Code | 9813
GeoTIFF Code | CT_ObliqueMercator_Laborde (4)
OGC WKT Name | Laborde_Oblique_Mercator
Supported By | EPSG, GeoTIFF, OGC WKT

### Projection Parameters

Name | EPSG # | GeoTIFF ID | OGC WKT | Units | Notes
--- | --- | --- | --- | --- | ---
Latitude of projection center | 1 | CenterLat | latitude_of_center | Angular |
Longitude of projection center | 2 | CenterLong | longitude_of_center | Angular |
Azimuth of initial line | 3 | AzimuthAngle | azimuth | Angular |
|  |  | rectified_grid_angle | Angular | Presumable this should be available for other sources in a manner similar to Oblique Mercator. Defaults to 90.
Scale factor on initial line | 5 | ScaleAtCenter | scale_factor | Unitless |
False Easting | 6 | FalseEasting | false_easting | Linear |
False Northing | 7 | FalseNorthing | false_northing | Linear |

### Notes

When using the Hotine Oblique Mercator equations to evaluate this, I imagine the angle from rectified to skewed grid would be 90.

I don't have information on what the OGC parameters should be.

### EPSG Notes

Can be accomodated by Oblique Mercator method (code 9815).