From 7285d082e93dd1e6d72f5fb8da2fbf599211e4e2 Mon Sep 17 00:00:00 2001
From: Namascae <30822977+Namascae@users.noreply.github.com>
Date: Thu, 14 Sep 2023 16:53:30 +0200
Subject: [PATCH] fix(fao): conversion between gml to geojson

---
 .../main/java/org/fao/geonet/util/XslUtil.java  | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/core/src/main/java/org/fao/geonet/util/XslUtil.java b/core/src/main/java/org/fao/geonet/util/XslUtil.java
index b68d3749649..0c926034131 100644
--- a/core/src/main/java/org/fao/geonet/util/XslUtil.java
+++ b/core/src/main/java/org/fao/geonet/util/XslUtil.java
@@ -84,6 +84,7 @@
 import org.geotools.geometry.jts.ReferencedEnvelope;
 import org.geotools.referencing.CRS;
 import org.geotools.referencing.crs.DefaultGeographicCRS;
+import org.geotools.referencing.crs.DefaultProjectedCRS;
 import org.geotools.xsd.Parser;
 import org.jdom.Document;
 import org.jdom.Element;
@@ -188,6 +189,22 @@ public static String gmlToGeoJson(String gml,
                     return "Warning: GML geometry is null.";
                 }
 
+                Object userData = geom.getUserData();
+                if (userData instanceof DefaultProjectedCRS) {
+                    geom = JTS.transform(
+                        geom,
+                        CRS.findMathTransform((DefaultProjectedCRS) userData,
+                            DefaultGeographicCRS.WGS84, true)
+                    );
+                }
+                else if (userData instanceof DefaultGeographicCRS) {
+                    geom = JTS.transform(
+                        geom,
+                        CRS.findMathTransform((DefaultGeographicCRS) userData,
+                            DefaultGeographicCRS.WGS84, true)
+                    );
+                }
+
                 if (!geom.isValid()) {
                     IsValidOp isValidOp = new IsValidOp(geom);
                     return String.format(