first commit

src/pg/test/sql/19_contour_test.sql

@@ -0,0 +1,14 @@
+SET client_min_messages TO WARNING;
+\set ECHO none
+\pset format unaligned
+
+WITH a AS (
+    SELECT
+    ARRAY[800, 700, 600, 500, 400, 300, 200, 100]::numeric[] AS vals,
+    ARRAY[ST_GeomFromText('POINT(2.1744 41.403)'),ST_GeomFromText('POINT(2.1228 41.380)'),ST_GeomFromText('POINT(2.1511 41.374)'),ST_GeomFromText('POINT(2.1528 41.413)'),ST_GeomFromText('POINT(2.165 41.391)'),ST_GeomFromText('POINT(2.1498 41.371)'),ST_GeomFromText('POINT(2.1533 41.368)'),ST_GeomFromText('POINT(2.131386 41.41399)')] AS g
+)
+SELECT
+    foo.*
+FROM
+    a,
+    CDB_contour(a.g, a.vals, 500, 0.0, 1,3,5) foo;