Ahad, 19 Disember 2010

Reference Geographic Coordinate System and Projection from MapInfo to Shapefile's

Now I want to convert the Projection and Geographic Coordinate System from MapInfo to create PRJ file for my shape files. I read in MapInfo.prj but I don't know the rule.

Example, In MapInfo Coorsys is:
"UTM Zone 28 (ED 50)\p23028", 8, 28, 7, -15, 0, 0.9996, 500000, 0

What are they following ESRI shape file (.prj)

Could you tell me the way to solve the problem?

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Luckily, the MapInfo Coordsys line includes the POSC code. In this case it's "23028".

So, create a ProjCoordSys object using MO, and set its Type property to 23028 (which is the same as the moProjCS_ED_1950_UTM_28N constant). Then use the ProjCoordSys's Export method, which will generate the PRJ file.

Following those instructions, here is what that PRJ file will look like:

 
PROJCS["ED_1950_UTM_Zone_28N",
GEOGCS["GCS_European_1950",
DATUM["D_European_1950",
SPHEROID["International_1924",6378388.0,297.0]],
PRIMEM["Greenwich",0.0],
UNIT["Degree",0.0174532925199433]],
PROJECTION["Transverse_Mercator"],
PARAMETER["False_Easting",500000.0],
PARAMETER["False_Northing",0.0],
PARAMETER["Central_Meridian",-15.0],
PARAMETER["Scale_Factor",0.9996],
PARAMETER["Latitude_Of_Origin",0.0],
UNIT["Meter",1.0]]

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