Changes between Version 4 and Version 5 of DevWikiEmptyGeometry

Timestamp:

Oct 6, 2009, 10:24:22 AM (15 years ago)

Author:

chodgson

Comment:

—

DevWikiEmptyGeometry

@@ -31 +31 @@
  * ST_Distance( empty, empty) == 0
  * ST_DWithin( empty, empty, tolerance) == true
+
+Hmmm.. perhaps this isn't even possible generally, as:
+ * intersects( A, B ) => intersection( A, B ) != empty
+but I think that we certainly want:
+ * intersection( empty, empty) == empty