From 93a0de1018ecfd704345edd62e851ef3b7c3a1fd Mon Sep 17 00:00:00 2001
From: Even Rouault <even.rouault@spatialys.com>
Date: Mon, 15 Nov 2021 18:58:45 +0100
Subject: createOperationsGeogToGeog(): avoid potential harmless floating-point
 division by zero. Fixes
 https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=41045

---
 src/iso19111/operation/coordinateoperationfactory.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/iso19111/operation/coordinateoperationfactory.cpp b/src/iso19111/operation/coordinateoperationfactory.cpp
index 3dc7e290..035fbab9 100644
--- a/src/iso19111/operation/coordinateoperationfactory.cpp
+++ b/src/iso19111/operation/coordinateoperationfactory.cpp
@@ -2427,8 +2427,9 @@ CoordinateOperationFactory::Private::createOperationsGeogToGeog(
                                     util::IComparable::Criterion::EQUIVALENT)) {
         if (offset_pm.value() == 0 && !axisReversal2D && !axisReversal3D) {
             // If only by vertical units, use a Change of Vertical
-            // Unit
-            // transformation
+            // Unit transformation
+            if (vconvDst == 0)
+                throw InvalidOperation("Conversion factor of target unit is 0");
             const double factor = vconvSrc / vconvDst;
             auto conv = Conversion::createChangeVerticalUnit(
                 util::PropertyMap().set(common::IdentifiedObject::NAME_KEY,
-- 
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