--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gnv-artifacts/src/main/java/de/intevation/gnv/math/XYDepth.java	Fri Sep 28 12:13:56 2012 +0200
@@ -0,0 +1,20 @@
+package de.intevation.gnv.math;
+
+import com.vividsolutions.jts.geom.Coordinate;
+
+/**
+ * Interface to encapsulate the query of the depth at a given point.
+ * @author <a href="mailto:sascha.teichmann@intevation.de">Sascha L. Teichmann</a>
+ */
+public interface XYDepth
+{
+    /**
+     * Returns the depth at a given coordinate. Negative
+     * values are below the water surface.
+     * @param coordinate The coordinate where to take the depth.
+     * @return The depth at the queried coordinate. NaN is no
+     * depth is available at the given point.
+     */
+    double depth(Coordinate coordinate);
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :