Add new option to proj_create_crs_to_crs_from_pj method to force +over on transformation operations (#2914)

Fixes #2512

1 files changed, 13 insertions, 1 deletions

diff --git a/src/4D_api.cpp b/src/4D_api.cpp
index d366aba8..94458398 100644
--- a/src/4D_api.cpp
+++ b/src/4D_api.cpp
@@ -1843,6 +1843,7 @@ PJ  *proj_create_crs_to_crs_from_pj (PJ_CONTEXT *ctx, const PJ *source_crs, cons
     const char* authority = nullptr;
     double accuracy = -1;
     bool allowBallparkTransformations = true;
+    bool forceOver = false;
     for (auto iter = options; iter && iter[0]; ++iter) {
         const char *value;
         if ((value = getOptionValue(*iter, "AUTHORITY="))) {
@@ -1859,7 +1860,13 @@ PJ  *proj_create_crs_to_crs_from_pj (PJ_CONTEXT *ctx, const PJ *source_crs, cons
                             "Invalid value for ALLOW_BALLPARK option.");
                 return nullptr;
             }
-        } else {
+        }
+        else if ((value = getOptionValue(*iter, "FORCE_OVER="))) {
+            if (ci_equal(value, "yes")) {
+                forceOver = true;
+            }
+        }
+        else {
             std::string msg("Unknown option :");
             msg += *iter;
             ctx->logger(ctx->logger_app_data, PJ_LOG_ERROR, msg.c_str());
@@ -1913,6 +1920,8 @@ PJ  *proj_create_crs_to_crs_from_pj (PJ_CONTEXT *ctx, const PJ *source_crs, cons
         return nullptr;
     }
 
+    ctx->forceOver = forceOver;
+
     PJ* P = proj_list_get(ctx, op_list, 0);
     assert(P);
 
@@ -1920,11 +1929,14 @@ PJ  *proj_create_crs_to_crs_from_pj (PJ_CONTEXT *ctx, const PJ *source_crs, cons
         proj_get_type(source_crs) == PJ_TYPE_GEOCENTRIC_CRS ||
         proj_get_type(target_crs) == PJ_TYPE_GEOCENTRIC_CRS ) {
         proj_list_destroy(op_list);
+        ctx->forceOver = false;
         return P;
     }
 
     auto preparedOpList = pj_create_prepared_operations(ctx, source_crs, target_crs,
                                                    op_list);
+
+    ctx->forceOver = false;
     proj_list_destroy(op_list);
 
     if( preparedOpList.empty() )