From cca27b1fae234a90df42ff5341121759846dc39b Mon Sep 17 00:00:00 2001
From: Even Rouault <even.rouault@spatialys.com>
Date: Tue, 30 Apr 2019 14:31:16 +0200
Subject: Propagate ballpark transformation flag to inverse coordinate
 operations

---
 src/iso19111/coordinateoperation.cpp |  5 +++++
 test/unit/test_operation.cpp         | 15 +++++++++++++++
 2 files changed, 20 insertions(+)

diff --git a/src/iso19111/coordinateoperation.cpp b/src/iso19111/coordinateoperation.cpp
index 6a05c285..2cab05bd 100644
--- a/src/iso19111/coordinateoperation.cpp
+++ b/src/iso19111/coordinateoperation.cpp
@@ -7484,6 +7484,8 @@ Transformation::Private::registerInv(util::BaseObjectNNPtr thisIn,
                                      TransformationNNPtr invTransform) {
     invTransform->d->forwardOperation_ =
         util::nn_dynamic_pointer_cast<Transformation>(thisIn);
+    invTransform->setHasBallparkTransformation(
+        invTransform->d->forwardOperation_->hasBallparkTransformation());
     return invTransform;
 }
 //! @endcond
@@ -9490,6 +9492,7 @@ CoordinateOperationNNPtr ConcatenatedOperation::inverse() const {
     auto op =
         create(properties, inversedOperations, coordinateOperationAccuracies());
     op->d->computedName_ = d->computedName_;
+    op->setHasBallparkTransformation(hasBallparkTransformation());
     return op;
 }
 
@@ -12704,6 +12707,8 @@ void InverseCoordinateOperation::setPropertiesFromForward() {
     if (forwardOperation_->sourceCRS() && forwardOperation_->targetCRS()) {
         setCRSs(forwardOperation_.get(), true);
     }
+    setHasBallparkTransformation(
+        forwardOperation_->hasBallparkTransformation());
 }
 
 // ---------------------------------------------------------------------------
diff --git a/test/unit/test_operation.cpp b/test/unit/test_operation.cpp
index b7b87d76..e1ced807 100644
--- a/test/unit/test_operation.cpp
+++ b/test/unit/test_operation.cpp
@@ -5396,6 +5396,21 @@ TEST(operation, projCRS_to_projCRS_context_incompatible_areas) {
 
 // ---------------------------------------------------------------------------
 
+TEST(operation, projCRS_to_projCRS_context_incompatible_areas_ballpark) {
+    auto authFactory =
+        AuthorityFactory::create(DatabaseContext::create(), "EPSG");
+    auto ctxt = CoordinateOperationContext::create(authFactory, nullptr, 0.0);
+    auto list = CoordinateOperationFactory::create()->createOperations(
+        authFactory->createCoordinateReferenceSystem("26711"), // UTM 11 NAD27
+        authFactory->createCoordinateReferenceSystem(
+            "3034"), // ETRS89 / LCC Europe
+        ctxt);
+    ASSERT_GE(list.size(), 1U);
+    EXPECT_TRUE(list[0]->hasBallparkTransformation());
+}
+
+// ---------------------------------------------------------------------------
+
 TEST(operation, projCRS_to_projCRS_north_pole_inverted_axis) {
 
     auto authFactory =
-- 
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