Opened 17 years ago

Last modified 8 years ago

#1520 closed defect

Difficulty representing three OGR WKT projections in PROJ4 Format — at Version 3

Reported by: cmichaelis@… Owned by: warmerdam
Priority: normal Milestone:
Component: OGR_SRS Version: unspecified
Severity: normal Keywords: Double_Stereographic
Cc:

Description (last modified by warmerdam)

Hi there,

I'm having a hard time representing three projections in PROJ4 format. When I try to do so (e.g., using a simple conversion like the one posted at http://lists.maptools.org/pipermail/proj/2001-October/000258.html) I always get a vast (and erroneous) simplification of the projection down to "+ellps=GRS80 +units=m +no_defs" or something similar.

Is it possible to represent these in PROJ4 format using OGR?

1) ATS 1977 New Brunswick Stereographic
PROJCS["ATS_1977_New_Brunswick_Stereographic",GEOGCS["GCS_ATS_1977",DATUM["D_ATS_1977",SPHEROID["ATS_1977",6378135,298.257]],PRIMEM["Greenwich",0],UNIT["Degree",0.0174532925199432955]],PROJECTION["Double_Stereographic"],PARAMETER["False_Easting",300000],PARAMETER["False_Northing",800000],PARAMETER["Central_Meridian",-66.5],PARAMETER["Scale_Factor",0.999912],PARAMETER["Latitude_Of_Origin",46.5],UNIT["Meter",1]]

2) NAD 1983 CSRS98 New Brunswick Stereographic
PROJCS["NAD_1983_CSRS98_New_Brunswick_Stereographic",GEOGCS["GCS_North_American_1983_CSRS98",DATUM["D_North_American_1983_CSRS98",SPHEROID["GRS_1980",6378137,298.257222101]],PRIMEM["Greenwich",0],UNIT["Degree",0.0174532925199432955]],PROJECTION["Double_Stereographic"],PARAMETER["False_Easting",2500000],PARAMETER["False_Northing",7500000],PARAMETER["Central_Meridian",-66.5],PARAMETER["Scale_Factor",0.999912],PARAMETER["Latitude_Of_Origin",46.5],UNIT["Meter",1]]

3) NAD 1983 CSRS98 Prince Edward Island
PROJCS["NAD_1983_CSRS98_Prince_Edward_Island",GEOGCS["GCS_North_American_1983_CSRS98",DATUM["D_North_American_1983_CSRS98",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Double_Stereographic"],PARAMETER["False_Easting",400000.0],PARAMETER["False_Northing",800000.0],PARAMETER["Central_Meridian",-63.0],PARAMETER["Scale_Factor",0.999912],PARAMETER["Latitude_Of_Origin",47.25],UNIT["Meter",1.0]]

Any help or feedback would be greatly appreciated. I posted this in component OGR_SRS, if it belongs in the PROJ bugzilla I beg forgiveness.

Thanks!
--Chris

Change History (1)

comment:3 by warmerdam, 17 years ago

Description: modified (diff)
Milestone: 1.5.0
Priority: highestnormal
Severity: blockernormal
Status: newassigned
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