Python Coding Examples for Drive Time Analysis
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The document describes using Python scripts and ArcGIS tools to analyze drive time service areas and population data. It discusses using a cursor to select individual records from a feature class, creating a new feature class for each record, clipping census block groups to the new feature class, calculating total population for the service area, and merging the individual feature classes into a single output. The purpose is to summarize the total population within different drive time thresholds from a given location.
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![Python & Drive Time Analyses Python 2.6 ArcCatalog 9.3.1 ArcMap 9.3.1 Project technologies Programming language: Software products: Janice Poehlman Division of Forestry, Dept. Natural Resources [email_address]](https://image.slidesharecdn.com/poehlmanpythonwlia2011-110311152242-phpapp01/85/Python-Coding-Examples-for-Drive-Time-Analysis-1-320.jpg)
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Python Coding Examples for Drive Time Analysis
- 1. Python & Drive Time Analyses Python 2.6 ArcCatalog 9.3.1 ArcMap 9.3.1 Project technologies Programming language: Software products: Janice Poehlman Division of Forestry, Dept. Natural Resources [email_address]
- 2. Use python scripts to summarize the total number of people who are within drive times of a location. 30 Minute 60 Minute 90 Minute 120 Minute Drive Time Service Area Network Analyst }
- 16. What is a cursor and how does it work.
- 17. What is a cursor and how does it work.
- 18. What is a cursor and how does it work.
- 19. What is a cursor and how does it work.
- 20. What is a cursor and how does it work.
- 26. After the cursor is used for geoprocessing every record, the individual feature classes containing block groups for each service area are merged together using a value table. gp.merge_management vTab = gp.createobject("ValueTable”) fcList = gp.listfeatureclasses("xxclipSEWNN*”) fc = fcList.Next() while fc: fcpath = gp.workspace + "" + fc vTab.Addrow(fcpath) fc = fcList.Next() gp.merge_management(vTab, "AMergedDriveTime120MinutesSEWNN", "”) print "Completed merged file for features of %s" %(servicearea) timestamp = time.strftime('%I:%M:%S %p', time.localtime()) log.write('Finishing time is ' + timestamp) print"Done.” del vTab del fc del fcpath del servicearea del timestamp log.close()
- 30. Thank you for your attention.