Determine and Assign Area Type for Network Links Using GIS Technology Petya Maneva (presenter) and Wang Zhang May 9, 2013
Area Type in Travel Demand Modeling Based on employment and population As a link attribute in transportation network, area type affects : roadway’s capacity free-flow speed possible travel delay
What Makes This Approach Different? Additional New Inputs: Share of developed area for each TAZ Big retail centers High number of university students Large and scarcely populated areas New Technique: Intensity surface using spatial interpolation technique Additional New Inputs: Share of developed area for each TAZ Big retail centers High number of university students, Large and scarcely populated areas New Technique: Intensity surface using spatial interpolation technique
The Methodology in a Nutshell Determine initial economic intensity using a larger set of variables Correct for special cases such as retail centers Interpolate among centroids of developed areas Go from continuous to categorical variables Transfer area type values from polygons to links
Generate Intensity Surface Continuous Economic Intensity Surface Kernel Interpolation with barriers. Epanechnikov, 4 miles bandwidth.
Area Type Polygons
Area Type at the Network Links Level
Implementation A fusion of: Python ESRI ArcObjects Caliper GISDK
Model Validation Improved Central Business District
Model Validation Improved Outlying Central Business District
Model Validation Improved Mixed Urban Area Type
? pmaneva@azmag.gov 602 452-5075 Petya Maneva wzhang@azmag.gov 602 452-5034 Wang Zhang