Translation Shape comparison language[Turn]

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Link:http://www.cnblogs.com/yhlx125/p/3635623.html

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Shape Comparison language

First of all, tell me about one of the problems I encountered:

Irelationaloperator.overlaps the method cannot query for all intersecting objects when it is used. Take a look at the description, where the intersection is contained within each object and no one object is equal.

Geometries? overlap? If the region of their intersection is of?the same dimension as the geometries involved and are not Equiva Lent to either of the geometries.? Overlaps is a Clementini operator.

and there is the use of Itopologicaloperator.intersect method returns the Igeometry is not NULL , but needs to pass its properties IsEmpty to Judge!

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Spatial relationships are defined by the intersection between the query geometry and the boundaries of the requested geometry, internal, and external.

Each character in the string represents a relationship between the query geometry and the geometry being tested, and can H Ave A value of T (true), F (FALSE), or * (not tested).

The following table shows the relationships represented by each character:

? ?		requested Geometry
		interior	boundary	exterior
Query geometry	Interior	1	2	3
	Boundary	4	5	6
	Exterior	7	8	9

Extended nine-intersection model

Yhexie

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