diff --git a/rog/views.py b/rog/views.py
index bef02ec..fcfcfb8 100644
--- a/rog/views.py
+++ b/rog/views.py
@@ -78,11 +78,19 @@ def LocationInBound(request):
     lon2 = float(request.GET.get('ln2'))
     lat3 = float(request.GET.get('la3'))
     lon3 = float(request.GET.get('ln3'))
+    cat = request.GET.get('cat')
 
-    pl = geos.Polygon(((lon1, lat1), (lon2, lat2), (lon3, lat3), (lon1, lat1)), srid=4326)
-    res = Location.objects.filter(geom__within=pl)
-    serializer = LocationSerializer(res, many=True)
-    return JsonResponse(serializer.data, safe=False)
+    if(lat1 != None and lon1 != None and lat2 != None and lon2 != None and lat3 != None and lon3 != None):
+        pl = geos.Polygon(((lon1, lat1), (lon2, lat2), (lon3, lat3), (lon1, lat1)), srid=4326)
+        if(cat):
+            locs = Location.objects.filter(geom__within=pl, category=cat)
+        else:
+            locs = Location.objects.filter(geom__within=pl)
+        res = Location.objects.filter(geom__within=pl)
+        serializer = LocationSerializer(res, many=True)
+        return JsonResponse(serializer.data, safe=False)
+    else:
+        return JsonResponse({}, safe=False)