• pgRouting on PostgreSQL
• Introduction
• Installation
• Template Creation and Use
• Topological Structure
• Core Features
• Public Transit Implementation
(Application Specific)

• PostGIS ships with a Shape file loader an dumper
• Various file types (Shape, MapInfo, DGN, GML, ...) can be read, converted and inserted to a PostGIS database using the OGC libraries
• A PostGIS Feature Table can be used as data source for a growing variety of map and feature server software like UMN MapServer,
GeoServer, uDGI, deegree , JUMP, etc...
• The data can be accessed using standard ODBC or JDBC connectors
• Several projects have evolved around PostGIS transforming and inserting geometries from highly specialized formats like SICAD
C60, EDBS, DXF, WLDGE and many more

• pgRouting adds routing functionality to PostgreSQL.
• pgRouting is an extendible open-source library that provides a variety of tools for shortest path search as extension of
PostgreSQL.
• Navigation for road networks requires complex routing algorithms that support turn restrictions and even time dependent attributes.
• Routing basically requires Network topology, which contains edges and nodes.

pgRouting provides functions for:
Shortest Path Dijkstra: routing algorithm without heuristics
Shortest Path A-Star: routing for large datasets (with heuristics)
Shortest Path Shooting-Star: routing with turn restrictions (with heuristics)
(Extras)
Traveling Salesperson Problem (TSP)
Driving Distance calculation (Isolines)

• On Ubuntu : • On Windows:
# Add pgRouting launchpad repository sudo add-apt-repository ppa:georepublic/pgrouting sudo apt-get update
# Install pgRouting packages sudo apt-get install gaul-devel \ postgresql-8.4-pgrouting \ postgresql-8.4-pgrouting-dd \ postgresql-8.4-pgrouting-tsp
Download pgRouting binary package from : http://www.pgrouting.org/down load.html
Copy Share folder from binary package to :
C:/Program Files/ …
/<version>/lib/

• Nodes : points with a geographic position.
• edges : represents connectivity of nodes, representing a polyline or multipolyline.
• Relations : between groups of nodes, edges and other relations which can be assigned certain properties.
• Tags can be applied to nodes, edges or relations and consist of name=value pairs.

To enable pgRouting functionality in a database, we need to run : pgRouting functions
routing_core.sql
routing_core_wrappers.sql
routing_topology.sql
TSP functions
routing_tsp.sql
routing_tsp_wrappers.sql
Driving Distance functions
routing_dd_wrappers.sql

• First we have to add source and target column, then we run the assign_vertex_id function ...:
-- Add "source" and "target" column
ALTER TABLE ways ADD COLUMN "source" integer;
ALTER TABLE ways ADD COLUMN "target" integer;
-- Run topology function (eg.)
assign_vertex_id(’<table>’, float tolerance, ’<geometry column’, ’<gid>’)
SELECT assign_vertex_id(’ways’, 0.00001, ’the_geom’, ’gid’);

• Data in-Use:
▫ POI tables
 Bus Stops
 Malls and Cinema Halls
 Hospitals .. etc
▫ Road Network
▫ Bus Routes

• Setting up pgRouting http://www.gpsfiledepot.com/tutorials/installing-and-setting-uppostgresql-with-postgis/ 1/2
• pgRouting Workshop http://workshop.pgrouting.org/index.html
• pgRouting Documents http://www.pgrouting.org/docs/
• PostGIS in Action