Index: /trunk/Ohana/src/opihi/dvo/skyregion.c
===================================================================
--- /trunk/Ohana/src/opihi/dvo/skyregion.c	(revision 14402)
+++ /trunk/Ohana/src/opihi/dvo/skyregion.c	(revision 14402)
@@ -0,0 +1,45 @@
+# include "dvoshell.h"
+
+static double RAs = 0.0;
+static double RAe = 0.0;
+static double DECs = 0.0;
+static double DECe = 0.0;
+
+// define the sky region for which extractions are limited
+int skyregion (int argc, char **argv) {
+  
+  if (argc == 1) {
+    gprint (GP_ERR, "current skyregion: %f - %f : %f - %f\n", RAs, RAe, DECs, DECe);
+    gprint (GP_ERR, "USAGE:  skyregion (min RA) (max RA) (min DEC) (max DEC)\n");
+    return (FALSE);
+  }
+
+  if (argc != 5) {
+    gprint (GP_ERR, "USAGE: skyregion (min RA) (max RA) (min DEC) (max DEC)\n");
+    return (FALSE);
+  }
+
+  set_skyregion (atof(argv[1]), atof(argv[2]), atof(argv[3]), atof(argv[4]));
+
+  return (TRUE);
+}
+
+int get_skyregion (double *Rs, double *Re, double *Ds, double *De) {
+
+  *Rs = RAs;
+  *Re = RAe;
+  *Ds = DECs;
+  *De = DECe;
+
+  return TRUE;
+}
+
+int set_skyregion (double Rs, double Re, double Ds, double De) {
+
+  RAs  = Rs;
+  RAe  = Re;
+  DECs = Ds;
+  DECe = De;
+
+  return TRUE;
+}