From e6a992b59985e51e2d205fe56c1abecc4a10ffd0 Mon Sep 17 00:00:00 2001
From: Even Rouault <even.rouault@spatialys.com>
Date: Fri, 23 Oct 2020 14:17:13 +0200
Subject: AuthorityFactory::createCoordinateOperation(): correctly compute
 accuracy of concatenated operation when there is a conversion step

---
 src/iso19111/factory.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

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

diff --git a/src/iso19111/factory.cpp b/src/iso19111/factory.cpp
index 211eb586..8d9742d5 100644
--- a/src/iso19111/factory.cpp
+++ b/src/iso19111/factory.cpp
@@ -3556,6 +3556,12 @@ operation::CoordinateOperationNNPtr AuthorityFactory::createCoordinateOperation(
                             } else {
                                 totalAcc += acc;
                             }
+                        } else if (dynamic_cast<const operation::Conversion *>(
+                                       op.get())) {
+                            // A conversion is perfectly accurate.
+                            if (totalAcc < 0) {
+                                totalAcc = 0;
+                            }
                         } else {
                             totalAcc = -1;
                             break;
-- 
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