[GRASS-CVS] hamish: grass/src/raster/r.report/cmd prt_report.c, 1.1.1.1, 1.2

[grass at intevation.de]

Author: hamish

Update of /grassrepository/grass/src/raster/r.report/cmd
In directory doto:/tmp/cvs-serv23370/grass/src/raster/r.report/cmd

Modified Files:
	prt_report.c 
Log Message:
more precise conversions to feet, square miles and acres
  (merge from 6.3 HEAD)


Index: prt_report.c
===================================================================
RCS file: /grassrepository/grass/src/raster/r.report/cmd/prt_report.c,v
retrieving revision 1.1.1.1
retrieving revision 1.2
diff -u -d -r1.1.1.1 -r1.2
--- prt_report.c	29 Dec 1999 15:11:12 -0000	1.1.1.1
+++ prt_report.c	20 Nov 2007 03:06:18 -0000	1.2
@@ -62,7 +62,7 @@
 	case ACRES:
 	    unit[i].label[0] = "";
 	    unit[i].label[1] = "acres";
-	    unit[i].factor   = 2.471e-4;
+	    unit[i].factor   = 2.47105381467165e-4;  /* 640 acres in a sq mile */
 	    break;
 
 	case HECTARES:
@@ -74,7 +74,7 @@
 	case SQ_MILES:
 	    unit[i].label[0] = "square";
 	    unit[i].label[1] = " miles";
-	    unit[i].factor   = 3.861e-7;
+	    unit[i].factor   = 3.86102158542446e-7;  /* 1 / ( (0.0254m/in * 12in/ft * 5280ft/mi)^2 ) */
 	    break;
 
 	default: