Index: trunk/scripts/BuildProjectionDefinitions.java
===================================================================
--- trunk/scripts/BuildProjectionDefinitions.java	(revision 13395)
+++ trunk/scripts/BuildProjectionDefinitions.java	(revision 13441)
@@ -46,4 +46,5 @@
     private static int noEsri = 0;
     private static int noOmercNoBounds = 0;
+    private static int noEquatorStereo = 0;
 
     /**
@@ -111,4 +112,7 @@
                 System.out.println(String.format(" * projection is Oblique Mercator (requires bounds), but no bounds specified: %d entries", noOmercNoBounds));
             }
+            if (noEquatorStereo > 0) {
+                System.out.println(String.format(" * projection is Equatorial Stereographic (see #15970): %d entries", noEquatorStereo));
+            }
             System.out.println();
             System.out.println(String.format("written %d entries from %s", noJosm, JOSM_EPSG_FILE));
@@ -194,4 +198,9 @@
             noOmercNoBounds++;
         }
+        // TODO: implement equatorial stereographic, see https://josm.openstreetmap.de/ticket/15970
+        if (result && "stere".equals(proj) && "0".equals(parameters.get(CustomProjection.Param.lat_0.key))) {
+            result = false;
+            noEquatorStereo++;
+        }
 
         return result;