1 files changed, 26 insertions, 0 deletions
diff --git a/noao/onedspec/ecidentify/ecnearest.x b/noao/onedspec/ecidentify/ecnearest.x
new file mode 100644
index 00000000..7b061472
--- /dev/null
+++ b/noao/onedspec/ecidentify/ecnearest.x
@@ -0,0 +1,26 @@
+include	<mach.h>
+include	"ecidentify.h"
+
+# EC_NEAREST -- Find the nearest feature to a given coordinate.
+
+procedure ec_nearest (ec, fitnear)
+
+pointer	ec			# ID pointer
+double	fitnear			# Coordinate to find nearest feature
+
+int	i, ec_next()
+double	delta, delta1
+
+begin
+	EC_CURRENT(ec) = 0
+
+	i = 0
+	delta = MAX_REAL
+	while (ec_next (ec, i) != EOF) {
+	    delta1 = abs (FIT(ec,i) - fitnear)
+	    if (delta1 < delta) {
+		EC_CURRENT(ec) = i
+		delta = delta1
+	    }
+	}
+end