Spatial Thinking in Planning Practice: An Introduction to GIS

24 WAYS THAT FEATURES SHARE GEOMETRY IN A TOPOLOGY Features can share geometry within a topology. Here are some examples among adjacent features. Source: ESRI Help http://webhelp.esri.com/arcgisserver/9.3/java/index.htm#geodatabases/topology_basics.htm % Area features can share boundaries (polygon topology). % Line features can share endpoints (edge–node topology). In addition, shared geometry can be managed between feature classes using a geodatabase topology. For example: % Line features can share segments with other line features. For example, parcels can nest within blocks: % Area features can be coincident with other area features. % Line features can share endpoint vertices with other point features (node topology). % Point features can be coincident with line features (point events). Source: ESRI Help: http://webhelp.esri.com/arcgisserver/9.3/java/index.htm#geodatabases/topology_basics. htm Chapter 3: Topology and Creating Data