11.5.2.4 MultiLineString Property Analysis Functions

GLength(mls)

Returns as a double-precision number the length of the MultiLineString value mls. The length of mls is equal to the sum of the lengths of its elements.

mysql> SELECT GLength(GeomFromText('MultiLineString((1 1,2 2,3 3),(4 4,5 5))'));
+-------------------------------------------------------------------+
| GLength(GeomFromText('MultiLineString((1 1,2 2,3 3),(4 4,5 5))')) |
+-------------------------------------------------------------------+
|                                                   4.2426406871193 |
+-------------------------------------------------------------------+

IsClosed(mls)

Returns 1 if the MultiLineString value mls is closed (that is, the StartPoint() and EndPoint() values are the same for each LineString in mls). Returns 0 if mls is not closed, and -1 if it is NULL.

mysql> SELECT IsClosed(GeomFromText('MultiLineString((1 1,2 2,3 3),(4 4,5 5))'));
+--------------------------------------------------------------------+
| IsClosed(GeomFromText('MultiLineString((1 1,2 2,3 3),(4 4,5 5))')) |
+--------------------------------------------------------------------+
|                                                                  0 |
+--------------------------------------------------------------------+

User Comments

Add your own comment.