add clip-2009.awk

contours/clip-2017.awk

@@ -0,0 +1,11 @@
+#!/usr/bin/awk -f
+#
+# this file works with SEZP circa ~2017 where y coordinate (the 7-digit one) is
+# first, and the field separator is ','
+BEGIN {
+    FS = ","
+}
+
+$1 > ymin && $1 < ymax && $2 > xmin && $2 < xmax {
+    print $2 "," $1 "," $3
+}