Cartographic to geographic coordinates conversion

Convert cartographic coordinates to geographic one.

Detailed description

This application computes the geographic coordinates from a cartographic one. User has to give the X and Y coordinate and the cartographic projection (UTM/LAMBERT/LAMBERT2/LAMBERT93/SINUS/ECKERT4/TRANSMERCATOR/MOLLWEID/SVY21).


This section describes in details the parameters available for this application. Table [1] presents a summary of these parameters and the parameters keys to be used in command-line and programming languages. Application key is ConvertCartoToGeoPoint .

[1]Table: Parameters table for Cartographic to geographic coordinates conversion.
Parameter Key Parameter Type Parameter Description
carto Group Group
carto.x Float Float
carto.y Float Float
mapproj Choices Choices
mapproj utm Choice Universal Trans-Mercator (UTM)
mapproj lambert2 Choice Lambert II Etendu
mapproj lambert93 Choice Lambert93
mapproj wgs Choice WGS 84
mapproj epsg Choice EPSG Code Int Int
mapproj.utm.northhem Boolean Boolean
mapproj.epsg.code Int Int
long Float Float
lat Float Float
inxml XML input parameters file XML input parameters file
outxml XML output parameters file XML output parameters file

[Input cartographic coordinates]

  • X cartographic coordinates: X cartographic coordinates in the specified projection.
  • Y cartographic coordinates: Y cartographic coordinates in the specified projection.

Output Cartographic Map Projection: Parameters of the output map projection to be used. Available choices are:

  • Universal Trans-Mercator (UTM): A system of transverse mercator projections dividing the surface of Earth between 80S and 84N latitude.
  • Zone number: The zone number ranges from 1 to 60 and allows defining the transverse mercator projection (along with the hemisphere).
  • Northern Hemisphere: 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.
  • 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;.
  • EPSG Code: See to find which EPSG code is associated to your projection.

Output long: Point longitude coordinates.

Output lat: Point latitude coordinates.

Load otb application from xml file: Load otb application from xml file.

Save otb application to xml file: Save otb application to xml file.


To run this example in command-line, use the following:

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

To run this example from Python, use the following code snippet:


# Import the otb applications package
import otbApplication

# The following line creates an instance of the ConvertCartoToGeoPoint application
ConvertCartoToGeoPoint = otbApplication.Registry.CreateApplication("ConvertCartoToGeoPoint")

# The following lines set all the application parameters:
ConvertCartoToGeoPoint.SetParameterFloat("carto.x", 367074.625)

ConvertCartoToGeoPoint.SetParameterFloat("carto.y", 4835740)



ConvertCartoToGeoPoint.SetParameterInt("", 31)

# The following line execute the application




This application has been written by OTB-Team.