Network analysis in gis , part 6 logical network
- 1. Part 6 Logical network Dr. IBRAHIM BATHIS K https://www.linkedin.com/in/dribrahimbathisk/ https://www.linkedin.com/in/dribrahimbathisk/
- 3. Logical network An abstract representation of a network, implemented as a collection of hidden tables. A logical network contains edge, junction, and turn elements, the connectivity between them, and the weights necessary for traversing the network. It does not contain information about the geometry or location of its elements; this information is one of the components of a network system. The logical network is the connectivity graph used for tracing and flow calculations. It is used to represent and model connectivity relationships between features. Its main purpose is to store the connectivity information of a network, along with certain attributes. https://www.linkedin.com/in/dribrahimbathisk/
- 4. Logical network An edge or junction element in the geometric network corresponds to one or more edges or junctions in the logical network. All connectivity between edges and junctions is maintained in the logical network. The logical network is managed as a collection of tables that are created and maintained by GIS software (ArcGIS). These tables record how the features involved in a geometric network are connected to one another. This allows for fast network tracing and facilitates the generation of on- the-fly connectivity while editing. When edges and junctions are edited or updated in the geometric network the corresponding logical network is automatically updated and maintained as well. https://www.linkedin.com/in/dribrahimbathisk/
- 5. Logical network An example to shows how a water main, represented by a single complex edge in the geometric network, is comprised of multiple elements in the logical network. The water mains corresponding tables in the logical network are created and maintained by ArcGIS. When edits are made to the water main in the geometric network, ArcGIS automatically updates the corresponding elements in the logical network and connectivity between features in the geometric network are maintained. https://www.linkedin.com/in/dribrahimbathisk/
- 7. Logical network Eg;- A pump station is a single polygon in the geometric network but represents a set of pipes, valves, meters, and pumps in the logical network. It is a complex junction feature. https://www.linkedin.com/in/dribrahimbathisk/