diff options
Diffstat (limited to 'examples/pj_obs_api_mini_demo.c')
| -rw-r--r-- | examples/pj_obs_api_mini_demo.c | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/examples/pj_obs_api_mini_demo.c b/examples/pj_obs_api_mini_demo.c index 34021488..83a13db1 100644 --- a/examples/pj_obs_api_mini_demo.c +++ b/examples/pj_obs_api_mini_demo.c @@ -21,18 +21,18 @@ The proj thread contexts have not seen widespread use, so one of the intentions with this new API is to make them less visible on the API surface. - + A series of experiments have, however, shown that they, for (mostly) historical reasons, are very hard to eliminate totally. But we have reduced their API surface presence to a constructor and a destructor, plus an extra argument to the PJ constructor, pj_create(). - + For single threaded programs, the calls to the context constructor and destructor may be left out, and the default context selected by passing a null-pointer to pj_create. Note: This file is in-lined in the documentation. Any changes must be - reflected in docs/source/development/quickstart.rst + reflected in docs/source/development/quickstart.rst Thomas Knudsen, 2016-10-30/2017-07-06 *******************************************************************************/ @@ -43,8 +43,9 @@ int main (void) { PJ_CONTEXT *C; PJ *P; PJ_COORD a, b; - - /* or you may set C=0 if you are sure you will use PJ objects from only one thread */ + + /* or you may set C=PJ_DEFAULT_CTX if you are sure you will */ + /* use PJ objects from only one thread */ C = proj_context_create(); P = proj_create (C, "+proj=utm +zone=32 +ellps=GRS80"); @@ -56,9 +57,9 @@ int main (void) { a = proj_coord (proj_torad(12), proj_torad(55), 0, 0); /* transform to UTM zone 32, then back to geographical */ - b = proj_trans_coord (P, PJ_FWD, a); - printf ("easting: %g, northing: %g\n", b.en.e, b.en.n); - b = proj_trans_coord (P, PJ_INV, b); + b = proj_trans (P, PJ_FWD, a); + printf ("easting: %g, northing: %g\n", b.enu.e, b.en.n); + b = proj_trans (P, PJ_INV, b); printf ("longitude: %g, latitude: %g\n", b.lp.lam, b.lp.phi); /* Clean up */ |