[mapguide-users] LatLong to UTM

[Don MacGregor]

Hi Dave,
You are right the point was in Zone 19.
But even when I enter a zone 12 point e.g. Long -110.85980508, Lat
55.50472355 then I got N:6151000.496561 E:508855.1818729 as a result and the
point should be N:6150967.822 E:508855.135.
Many thanks for you time.



Dave Wilson-3 wrote:
> 
> I could be completely off here, but -71,42 is in North Eastern United
> States which is definitely not Zone 12.
> 
> Dave
> 
> From: mapguide-users-bounces at lists.osgeo.org
> [mailto:mapguide-users-bounces at lists.osgeo.org] On Behalf Of Don C.
> MacGregor
> Sent: Friday, August 29, 2008 8:32 AM
> To: mapguide-users at lists.osgeo.org
> Subject: [mapguide-users] LatLong to UTM
> 
> Hi folks,
> I am trying to write a script that can convert LatLong point to UTM.
> Although the script its working but I am not getting the right results.
> Below please find my script.
> 
>     $wktProj =
> 'PROJCS["NAD_1983_UTM_Zone_12N",GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",500000.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",-111.0],PARAMETER["Scale_Factor",0.99965242],PARAMETER["Latitude_Of_Origin",0.0],UNIT["Meter",1.0]]';
>         $coordSysFactory = new MgCoordinateSystemFactory();
>         $coordSysProj = $coordSysFactory->Create($wktProj);
>         $geometryFactory = new MgGeometryFactory();
>         $xProj = -71.061342;
>         $yProj= 42.353966647205;
>         $coordinate = $geometryFactory->CreateCoordinateXY($xProj,
> $yProj);
>         $convertedCoordinate =
> $coordSysProj->ConvertFromLonLat($coordinate);
> 
>         $xConv = $convertedCoordinate->GetX();
>         $yConv = $convertedCoordinate->GetY();
> 
> I am getting (434696.747152, 6017918.57788) and the correct porjected
> point is (434700.172, 6017603.009).
> Any help in this regard would be highly appreciated.
> Thanks
> 
> 
> 
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