From 8869f7036efb879620a7e42f9c159a5bb07511cb Mon Sep 17 00:00:00 2001
From: Even Rouault <even.rouault@spatialys.com>
Date: Tue, 4 Dec 2018 16:51:55 +0100
Subject: export to WKT1 of geocentric CRS: do not emit a TOWGS84 node if the
 datum is WGS84

---
 src/crs.cpp | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'src/crs.cpp')

diff --git a/src/crs.cpp b/src/crs.cpp
index d4d98fa4..9f1f53c7 100644
--- a/src/crs.cpp
+++ b/src/crs.cpp
@@ -372,6 +372,11 @@ CRSNNPtr CRS::createBoundCRSToWGS84IfPossible(
     auto geogCRS = extractGeographicCRS();
     auto hubCRS = util::nn_static_pointer_cast<CRS>(GeographicCRS::EPSG_4326);
     if (geodCRS && !geogCRS) {
+        if (geodCRS->_isEquivalentTo(
+                GeographicCRS::EPSG_4978.get(),
+                util::IComparable::Criterion::EQUIVALENT)) {
+            return thisAsCRS;
+        }
         hubCRS = util::nn_static_pointer_cast<CRS>(GeodeticCRS::EPSG_4978);
     } else if (!geogCRS ||
                geogCRS->_isEquivalentTo(
-- 
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