[OSRS-PROJ] lib call results differ from exec results
Sharon Mingus
dsmingus at yahoo.com
Mon Jul 14 09:52:37 PDT 2003
I'm using the latest cvs libproj for transformations
of coords and am having a problem. I wrote this test
program:
#include <proj_api.h>
#include <stdio.h>
int main( int argc, char** argv )
{
char *parms[] = {
"proj=aea",
"ellps=clrk66"
};
projPJ pj = pj_init( 2, parms );
if( !pj )
{
printf( "COULD NOT INIT\n" );
return -1;
}
projXY xy;
xy.u = atof( argv[1] ) * DEG_TO_RAD;
xy.v = atof( argv[2] ) * DEG_TO_RAD;
printf( "FWD " );
xy = pj_fwd( xy, pj );
printf( "%10.4f, %10.4f\n\n", xy.u, xy.v );
return 1;
}
Then I do this:
$ ./proj_test -110.969 39.7621
FWD -7422073.9419, 9122801.8182
$ echo "-110.969,39.7621" | proj +proj=aea
+ellps=clrk66
-11303100.31 7467691.88,39.7621
very different resulting coordinates. Why is this?
then I do this:
$ echo "-11303100.31 7467691.88" | ./invproj
+proj=aea +ellps=clrk66
110d58'8.4"W 0dN
Shouldn't it result with original lon/lat input?
Also, this mailing list has a search link that doesn't
work. Is there a way to search this archive?
Thanks
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