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Topology Use Cases from the SIS experience

Status of the document

Just a firts skeleton

Aim of the document

Describe the different kind of topology relationships which are needed for dealing with a street database, yet trying to keep the discussion as general as possible.

Topological models

Model

Description

Geometry types involved

network

lines connecting at node endpoints

LineString on Point

segmentation

Locating a point or a segment on a line using start and end offset

LineString / no geom

route

Defines a route over a network

LineString / no geom

subnetwork

Defines a network where the linear element is a route system over a second network and the nodes come from this second network

LineString / no geom

polygon_boundary

Lines defining the boundaries between polygons

LineString on Polygon

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