From b7e7a3bd4a85ce07cc9dee457f3c44be43950084 Mon Sep 17 00:00:00 2001
From: Even Rouault <even.rouault@spatialys.com>
Date: Wed, 11 Sep 2019 13:55:17 +0000
Subject: Ingestion of +proj=somerc +type=crs: avoid adding twice alpha, gamma,
 lon_0 (related to #1597)

---
 src/iso19111/io.cpp | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

(limited to 'src/iso19111/io.cpp')

diff --git a/src/iso19111/io.cpp b/src/iso19111/io.cpp
index 25d122af..e5cabd3d 100644
--- a/src/iso19111/io.cpp
+++ b/src/iso19111/io.cpp
@@ -8313,10 +8313,13 @@ CRSNNPtr PROJStringParser::Private::buildProjectedCRS(
     } else if (step.name == "somerc") {
         mapping =
             getMapping(EPSG_CODE_METHOD_HOTINE_OBLIQUE_MERCATOR_VARIANT_B);
-        step.paramValues.emplace_back(Step::KeyValue("alpha", "90"));
-        step.paramValues.emplace_back(Step::KeyValue("gamma", "90"));
-        step.paramValues.emplace_back(
-            Step::KeyValue("lonc", getParamValue(step, "lon_0")));
+        if (!hasParamValue(step, "alpha") && !hasParamValue(step, "gamma") &&
+            !hasParamValue(step, "lonc")) {
+            step.paramValues.emplace_back(Step::KeyValue("alpha", "90"));
+            step.paramValues.emplace_back(Step::KeyValue("gamma", "90"));
+            step.paramValues.emplace_back(
+                Step::KeyValue("lonc", getParamValue(step, "lon_0")));
+        }
     } else if (step.name == "krovak" &&
                ((getParamValue(step, "axis") == "swu" && iAxisSwap < 0) ||
                 (iAxisSwap > 0 &&
-- 
cgit v1.2.3


From 9e5807499c5a37d31f983cd58eb21c918daf1fef Mon Sep 17 00:00:00 2001
From: Even Rouault <even.rouault@spatialys.com>
Date: Wed, 11 Sep 2019 14:22:32 +0000
Subject: createFromPROJString(): ignore +no_defs when instanciating a
 '+init=epsg:xxxx +no_defs' string (related to #1597)

---
 src/iso19111/io.cpp | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

(limited to 'src/iso19111/io.cpp')

diff --git a/src/iso19111/io.cpp b/src/iso19111/io.cpp
index e5cabd3d..ebccf78b 100644
--- a/src/iso19111/io.cpp
+++ b/src/iso19111/io.cpp
@@ -8759,10 +8759,17 @@ PROJStringParser::createFromPROJString(const std::string &projString) {
             if (!file_found) {
                 auto obj = createFromUserInput(stepName, d->dbContext_, true);
                 auto crs = dynamic_cast<CRS *>(obj.get());
-                if (crs &&
-                    (d->steps_[0].paramValues.empty() ||
-                     (d->steps_[0].paramValues.size() == 1 &&
-                      d->getParamValue(d->steps_[0], "type") == "crs"))) {
+
+                bool hasSignificantParamValues = false;
+                for (const auto &kv : d->steps_[0].paramValues) {
+                    if (!((kv.key == "type" && kv.value == "crs") ||
+                          kv.key == "no_defs")) {
+                        hasSignificantParamValues = true;
+                        break;
+                    }
+                }
+
+                if (crs && !hasSignificantParamValues) {
                     PropertyMap properties;
                     properties.set(IdentifiedObject::NAME_KEY,
                                    d->title_.empty() ? crs->nameStr()
-- 
cgit v1.2.3