From 6ec0c75d6de011cc5d808631ed3c6dd00348d197 Mon Sep 17 00:00:00 2001
From: signedav <david@opengis.ch>
Date: Fri, 24 Feb 2023 14:00:36 +0100
Subject: [PATCH] Append distance area when using defaultMapUnitsPerMm to
 consider the correct CRS and care about meter based crs. This fixes #50366

---
 src/server/services/wms/qgswmsrenderer.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/server/services/wms/qgswmsrenderer.cpp b/src/server/services/wms/qgswmsrenderer.cpp
index efe5b128ce4..4df2b93484a 100644
--- a/src/server/services/wms/qgswmsrenderer.cpp
+++ b/src/server/services/wms/qgswmsrenderer.cpp
@@ -142,6 +142,10 @@ namespace QgsWms
       context.setScaleFactor( mContext.dotsPerMm() );
       const double mmPerMapUnit = 1 / QgsServerProjectUtils::wmsDefaultMapUnitsPerMm( *mProject );
       context.setMapToPixel( QgsMapToPixel( 1 / ( mmPerMapUnit * context.scaleFactor() ) ) );
+      QgsDistanceArea distanceArea;
+      distanceArea.setSourceCrs( QgsCoordinateReferenceSystem( mWmsParameters.crs() ), mProject->transformContext() );
+      distanceArea.setEllipsoid( geoNone() );
+      context.setDistanceArea( distanceArea );
     }
 
     // create image according to context