From b27efedef0b3deb488d322d42b3d5b652ab55662 Mon Sep 17 00:00:00 2001
From: Even Rouault <even.rouault@spatialys.com>
Date: Thu, 26 Nov 2020 18:49:25 +0100
Subject: PRIMEM WKT handling: fixes on import for 'sexagesimal DMS' or from
 WKT1:GDAL/ESRI when GEOGCS UNIT != Degree; morph to ESRI the PRIMEM name on
 export

---
 src/iso19111/datum.cpp | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

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

diff --git a/src/iso19111/datum.cpp b/src/iso19111/datum.cpp
index 60244779..8e1b8257 100644
--- a/src/iso19111/datum.cpp
+++ b/src/iso19111/datum.cpp
@@ -351,6 +351,23 @@ void PrimeMeridian::_exportToWKT(
     if (!(isWKT2 && formatter->primeMeridianOmittedIfGreenwich() &&
           l_name == "Greenwich")) {
         formatter->startNode(io::WKTConstants::PRIMEM, !identifiers().empty());
+
+        if (formatter->useESRIDialect()) {
+            bool aliasFound = false;
+            const auto &dbContext = formatter->databaseContext();
+            if (dbContext) {
+                auto l_alias = dbContext->getAliasFromOfficialName(
+                    l_name, "prime_meridian", "ESRI");
+                if (!l_alias.empty()) {
+                    l_name = l_alias;
+                    aliasFound = true;
+                }
+            }
+            if (!aliasFound) {
+                l_name = io::WKTFormatter::morphNameToESRI(l_name);
+            }
+        }
+
         formatter->addQuotedString(l_name);
         const auto &l_long = longitude();
         if (formatter->primeMeridianInDegree()) {
-- 
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