[GRASS-SVN] r54719 - grass/trunk/lib/python/pygrass/vector

[svn_grass at osgeo.org]

Author: zarch
Date: 2013-01-20 09:19:29 -0800 (Sun, 20 Jan 2013)
New Revision: 54719

Modified:
   grass/trunk/lib/python/pygrass/vector/geometry.py
Log:
Add area method to Boundary class

Modified: grass/trunk/lib/python/pygrass/vector/geometry.py
===================================================================
--- grass/trunk/lib/python/pygrass/vector/geometry.py	2013-01-20 17:19:20 UTC (rev 54718)
+++ grass/trunk/lib/python/pygrass/vector/geometry.py	2013-01-20 17:19:29 UTC (rev 54719)
@@ -1004,7 +1004,20 @@
                                     left, right)
         return left.contents.value, right.contents.value
 
+    def area(self):
+        """Return the area of the polygon.
+        ::
+            >>> bound = Boundary([(0, 0), (0, 2), (2, 2), (2, 0), (0, 0)])
+            >>> bound.area()
+            4
 
+        .."""
+        libgis.G_begin_polygon_area_calculations()
+        return libgis.G_area_of_polygon(self.c_points.contents.x,
+                                        self.c_points.contents.y,
+                                        self.c_points.contents.n_points)
+
+
 class Centroid(Point):
     """The Centroid class inherit from the Point class.
     Centroid contains an attribute with the C Map_info struct, and attributes