Developer's Guide - MapGuide Open Source - OSGeo

■ MgLineString — a series of connected line segments
■ MgCurveString — a series of connected curve segments
■ MgPolygon — a polygon with sides formed from line segments
■ MgCurvePolygon — a polygon with sides formed from curve segments
The curve segments are circular arcs, defined by a start point, an end point,
and a control point.
Complex types are formed by aggregating simple types. The complex types
are:
■ MgMultiPoint — a group of points
■ MgMultiLineString — a group of line strings
■ MgMultiCurveString — a group of curve strings
■ MgMultiPolygon — a group of polygons
■ MgMultiCurvePolygon — a group of curve polygons
■ MgMultiGeometry — a group of simple geometry objects of any type
Comparing Geometry Objects
The MgGeometry class contains methods for comparing different geometry
objects. These are similar to the spatial filters described in Selecting with the
Web API (page 35). Methods to test spatial relationships include:
■ Contains()
■ Crosses()
■ Disjoint()
■ Equals()
■ Intersects()
■ Overlaps()
■ Touches()
■ Within()
Comparing Geometry Objects | 73