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Unformatted text preview: Connectivity: Directed network Trees Hierarchic order Strahler stream order Bifurcation ratio: ratio of links at one order to links at the next order Street network: Pruning 6 Stream order Strahler order in GIS http://www.krisweb.com/krisredwoodck/krisdb/html/krisweb/maps/order_ortho.gif Panama: Streams from SRTM Terrain: stream network 7 National Hydrographic Database Distance to network Connections between networks: SkyWest: Spoke and hub Directions: MapQuest 8 Shortest path: Dijkstras algorithm Visit all nodes, shortest path Robert Kosara: EagerEyes.org Isochrone Voronoi diagram 9 Voronoi World Population (equal cells) Network maps Terminology from topology: node, link, directed, planar Simple measures possible e.g. diameter, connectivity index Tree networks have orders, e.g. Strahler and measures e.g. branching ratio Algorithms can compute shortest path Isochrones...
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This note was uploaded on 12/27/2011 for the course GEOG 12 taught by Professor Gautier during the Fall '08 term at UCSB.
 Fall '08
 Gautier
 Geography

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