Convert cartographic coordinates to geographic ones.


This application computes the geographic coordinates from cartographic ones. User has to give the X and Y coordinate and the cartographic projection (see mapproj parameter for details).


Input cartographic coordinates

X cartographic coordinates -carto.x float Mandatory
X cartographic coordinates in the projection defined by mapproj parameter

Y cartographic coordinates -carto.y float Mandatory
Y cartographic coordinates in the projection defined by mapproj parameter

Map Projection -mapproj [utm|lambert2|lambert93|wgs|epsg] Default value: utm
Defines the map projection to be used.

  • Universal Trans-Mercator (UTM)
    A system of transverse mercator projections dividing the surface of Earth between 80S and 84N latitude.

  • Lambert II Etendu
    This is a Lambert Conformal Conic projection mainly used in France.

  • Lambert93
    This is a Lambert 93 projection mainly used in France.

  • WGS 84
    This is a Geographical projection

  • EPSG Code
    This code is a generic way of identifying map projections, and allows specifying a large amount of them. See to find which EPSG code is associated to your projection;

Universal Trans-Mercator (UTM) options

Zone number int Default value: 31
The zone number ranges from 1 to 60 and allows defining the transverse mercator projection (along with the hemisphere)

Northern Hemisphere -mapproj.utm.northhem bool Default value: false
The transverse mercator projections are defined by their zone number as well as the hemisphere. Activate this parameter if your image is in the northern hemisphere.

EPSG Code options

EPSG Code -mapproj.epsg.code int Default value: 4326
See to find which EPSG code is associated to your projection

Output long -long float Mandatory
Point longitude coordinates in decimal degrees.

Output lat -lat float Mandatory
Point latitude coordinates in decimal degrees.


From the command-line:

otbcli_ConvertCartoToGeoPoint -carto.x 367074.625 -carto.y 4835740 -mapproj utm -mapproj.utm.northhem true 31

From Python:

import otbApplication

app = otbApplication.Registry.CreateApplication("ConvertCartoToGeoPoint")

app.SetParameterFloat("carto.x", 367074.625)
app.SetParameterFloat("carto.y", 4835740)
app.SetParameterInt("", 31)