From 06162ef3cca9a4c716922a7a379ba502f7ef295a Mon Sep 17 00:00:00 2001
From: Even Rouault <even.rouault@spatialys.com>
Date: Fri, 23 Oct 2020 17:44:29 +0200
Subject: PROJStringFormatter::getUsedGridNames(): recognize +file= parameter
 of operation +proj=tinshift

---
 src/iso19111/io.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/iso19111/io.cpp b/src/iso19111/io.cpp
index b8e835d7..f4ec7740 100644
--- a/src/iso19111/io.cpp
+++ b/src/iso19111/io.cpp
@@ -7912,7 +7912,7 @@ std::set<std::string> PROJStringFormatter::getUsedGridNames() const {
     std::set<std::string> res;
     for (const auto &step : d->steps_) {
         for (const auto &param : step.paramValues) {
-            if (param.keyEquals("grids")) {
+            if (param.keyEquals("grids") || param.keyEquals("file")) {
                 const auto gridNames = split(param.value, ",");
                 for (const auto &gridName : gridNames) {
                     res.insert(gridName);
-- 
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