--- a/schema/isrs_functions.sql	Tue Jan 08 18:36:53 2019 +0100
+++ b/schema/isrs_functions.sql	Tue Jan 08 19:55:15 2019 +0100
@@ -1,3 +1,17 @@
+-- This is Free Software under GNU Affero General Public License v >= 3.0
+-- without warranty, see README.md and license for details.
+
+-- SPDX-License-Identifier: AGPL-3.0-or-later
+-- License-Filename: LICENSES/AGPL-3.0.txt
+
+-- Copyright (C) 2018 by via donau
+--   – Österreichische Wasserstraßen-Gesellschaft mbH
+-- Software engineering by Intevation GmbH
+
+-- Author(s):
+--  * Tom Gottfried <tom@intevation.de>
+--  * Sascha Wilde <wilde@intevation.de>
+
 -- Clip an area to a stretch given by a pair of ISRS location codes.
 -- Uses the table waterway.distance_marks_virtual to map ISRS location codes
 -- to their geo-location and the table waterway.waterway_axis to retrieve