[Proj] GeoTiff <-> Proj.4
support.mn at elisanet.fi
support.mn at elisanet.fi
Wed Oct 1 10:08:12 EDT 2008
Hello,
There is no general rule how to map GeoTiff GeoKeys to proj.4
parameters (or is there?) Every projection has it's own mapping?
Can I write "lat_ts" instead of "lat_0" ??
Is there "lon_ts"?
Here I have those keys I have found some mapping,
but how about the others. Must be different for each
projection?
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ProjLinearUnitSizeGeoKey 3077 in meters
ProjStdParallelGeoKey 3078 in GeogAngularUnit -> lat_1
ProjStdParallel2GeoKey 3079 in GeogAngularUnit -> lat_2
ProjOriginLongGeoKey 3080 in GeogAngularUnit -> lon_0
ProjOriginLatGeoKey 3081 in GeogAngularUnit -> lat_0
ProjFalseOriginLongGeoKey 3084 in GeogAngularUnit
ProjFalseOriginLatGeoKey 3085 in GeogAngularUnit
ProjCenterLongGeoKey 3088 in GeogAngularUnit
ProjCenterLatGeoKey 3089 in GeogAngularUnit
ProjFalseEastingGeoKey 3082 in ProjLinearUnits -> x_0
ProjFalseNorthingGeoKey 3083 in ProjLinearUnits -> y_0
ProjFalseOriginEastingGeoKey 3086 in ProjLinearUnits
ProjFalseOriginNorthingGeoKey 3087 in ProjLinearUnits
ProjCenterEastingGeoKey 3090 in ProjLinearUnits
ProjCenterNorthingGeoKey 3091 in ProjLinearUnits
ProjScaleAtOriginGeoKey 3092 in ratio -> k_0
ProjScaleAtCenterGeoKey 3093 in ratio
ProjAzimuthAngleGeoKey 3094 in GeogAzimuthUnit -> alpha
ProjStraightVertPoleLongGeoKey 3095 in GeogAngularUnit
ProjRectifiedGridAngleGeoKey 3096 in GeogAngularUnit
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Regards: Janne.
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