+if (defined(param('mlon'))) {
+ $mlon = param('mlon');
+ unless ($mlon =~ m/^-{0,1}\d+\.\d+$/) { $mlon = -999.0; }
+ if (($mlon < -180.0) || ($mlon > 180.0)) { $mlon = -999.0; }
+}
+if (defined(param('mlat'))) {
+ $mlat = param('mlat');
+ unless ($mlat =~ m/^-{0,1}\d+\.\d+$/) { $mlat = -999.0; }
+ if (($mlat < -90.0) || ($mlat > 90.0)) { $mlat = -999.0; }
+}