Nyall Dawson 12e34f2672 [expressions] Allow make_point to accept z/m values, add new ...

make_point_m for creation of PointM geometries. Also add
m(point) and z(point) functions for retrieving z/m value of
a point or node.

2015-11-06 20:09:13 +11:00

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[expressions] Allow make_point to accept z/m values, add new

2015-11-06 20:09:13 +11:00