Add 'expected accuracy' member to PJ_PROJ_INFO struct.

2 files changed, 10 insertions, 4 deletions

diff --git a/src/pj_obs_api.c b/src/pj_obs_api.c
index a6cb2623..5c9f398b 100644
--- a/src/pj_obs_api.c
+++ b/src/pj_obs_api.c
@@ -595,6 +595,11 @@ PJ_PROJ_INFO proj_pj_info(PJ *P) {
 
     memset(&info, 0, sizeof(PJ_PROJ_INFO));
 
+    /* Expected accuracy of the transformation. Hardcoded for now, will be improved */
+    /* later. Most likely to be used when a transformation is set up with           */
+    /* proj_create_crs_to_crs in a future version that leverages the EPSG database. */
+    info.accuracy = -1.0;
+
     if (!P) {
         return info;
     }
diff --git a/src/proj.h b/src/proj.h
index d344485d..600d5b30 100644
--- a/src/proj.h
+++ b/src/proj.h
@@ -305,10 +305,11 @@ struct PJ_INFO {
 };
 
 struct PJ_PROJ_INFO {
-    char        id[16];             /* Name of the projection in question           */
-    char        description[128];   /* Description of the projection                */
-    char        definition[512];    /* Projection definition                        */
-    int         has_inverse;        /* 1 if an inverse mapping exists, 0 otherwise  */
+    char        id[16];             /* Name of the projection in question                       */
+    char        description[128];   /* Description of the projection                            */
+    char        definition[512];    /* Projection definition                                    */
+    int         has_inverse;        /* 1 if an inverse mapping exists, 0 otherwise              */
+    double      accuracy;           /* Expected accuracy of the transformation. -1 if unknown.  */
 };
 
 struct PJ_GRID_INFO {