diff --git a/grammar/fbp.peg b/grammar/fbp.peg
index 5df3084..43abee6 100644
--- a/grammar/fbp.peg
+++ b/grammar/fbp.peg
@@ -29,7 +29,12 @@
         if (item.length === 1) {
           item = ['routes', item[0]];
         }
-        metadata[item[0]] = item[1];
+        var key = item[0];
+        var value = item[1];
+        if (key==='x' || key==='y') {
+          value = parseFloat(value);
+        }
+        metadata[key] = value;
       }
       nodes[nodeName].metadata=metadata;
     }