4

I have a custom coordinate system that I was confused how to translate it to the MyCoordSysDefs.fme for use in Safe Desktop. Here's how it is represented in the prj file.

PROJCS["Lumos_Projection_Foot", GEOGCS["GCS_North_American_1983", DATUM["D_North_American_1983", SPHEROID["Geodetic_Reference_System_of_1980",6378137,298.2572221008916]], PRIMEM["Greenwich",0], UNIT["Degree",0.017453292519943295]], PROJECTION["Transverse_Mercator"], PARAMETER["latitude_of_origin",0], PARAMETER["central_meridian",-80], PARAMETER["scale_factor",0.9996], PARAMETER["false_easting",4921259.843], PARAMETER["false_northing",0], UNIT["Foot_US",0.30480060960121924]]

I read over the help for FME DEsktop, but the I did not know how to translate it because it had two units and so many Parameters. I appricate any help. Thanks

5

The entry for the above projection in MyCoordSysDefs.fme should look like this:

COORDINATE_SYSTEM_DEF  NAD83-LUMOS        \
   DESC_NM "NAD83 Lumos Projection USFT"  \
   DT_NAME NAD83                          \
   PROJ TM                                \
   UNIT FOOT                              \
   PARM1 -80.0                            \
   SCL_RED 0.9996                         \
   ORG_LAT 0.0                            \
   X_OFF 4921259.843                      \
   Y_OFF 0.0                        

You can change the COORDINATE_SYSTEM_DEF and DESC_NM to whatever you'd like.

1

For reference, Safe Software now publish a website that converts ESRI WKT from a PRJ into an FME recognized file. See Define Custom Coordinate System

The results when inputting your PRJ are as follows:

COORDINATE_SYSTEM_DEF NAD83-LUMOS \
DESC_NM "NAD83 Lumos Projection USFT" \
DT_NAME NAD83 \
ORG_LAT 0 \
PARM1 -80 \
PROJ TM \
QUAD 1 \
SCL_RED 0.9996000000 \
UNIT FOOT \
X_OFF 4921259.843 \
Y_OFF 0

Which confirms the results by Mintx.

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