[OSRS-PROJ] lib call results differ from exec results
Sharon Mingus
dsmingus at yahoo.com
Tue Jul 15 06:43:55 PDT 2003
Ok, I am catching the drift here. I was unaware of
the different versions, remotesensing.org & "classic
proj4" . Also, I missed a comma in the parms
declaration. Thanks for the help.
char *parms[] = {
"proj=aea",
"ellps=clrk66",
"lat_1=20.0n",
"lat_2=60.0n" // <-- multi-line literal concat
"lon_0=110w",
"lat_0=40n"
};
doh!
--- "Gerald I. Evenden" <gerald.evenden at verizon.net>
wrote:
> Just to beat this dead horse some more:
>
> #include <stdio.h>
> #include <stdlib.h>
> #include "lib_proj.h"
> int
> main(int narg, char **argl) {
> PJ *P;
> XY out;
> LP in;
> char *alist[] = {
> "proj=aea",
> "ellps=clrk66",
> "lat_1=20",
> "lat_2=60",
> "lon_0=-110",
> "lat_0=40"};
>
> if (!(P = pj_init(6, alist))) {
> printf("proj init failed\n");
> exit(1);
> }
> in.lam = atof(argl[1]) * DEG_TO_RAD;
> in.phi = atof(argl[2]) * DEG_TO_RAD;
> out = pj_fwd(in, P);
> printf("%s %s makes %.3f %.3f meters\n",argl[1],
> argl[2], out.x, out.y);
> exit(0);
> }
>
> After compiling and executing:
>
> ./a.out -110.969 39.7621
> -110.969 39.7621 makes -78175.382 -27659.274 meters
>
> Seems to agree pretty well.
>
> On Mon, 2003-07-14 at 20:10, Gerald I. Evenden
> wrote:
> > For local execution of the runline:
> >
> > echo "-110.969 39.7621"|./lproj +proj=aea
> +ellps=clrk66 +lat_1=20
> > +lat_2=60 +lon_0=110w +lat_0=40
> > -78175.38 -27659.27
> >
> > which is a much more reasonable value for a point
> fairly close
> > to the projection origin of -110,40.
> >
> > One problem is there is a "," (comma) in the input
> stream.
> > 'lproj' or 'proj' only understand white-space
> delimiting.
> >
> > As for the scanning of "default" file I must admit
> it was there
> > earlier and was always a curse. Number one
> question after someone
> > installed the system was why it failed---most of
> the time the
> > default file could not be found. Some setup
> failure.
> >
> > I got rid of it but it still haunts me.
> > .
> --
> Gerald I. Evenden <gerald.evenden at verizon.net>
>
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