The benefits of Python in GIS - Florida Chapter IAAO Conference/GIS Python...• “A Python Primer...
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Transcript of The benefits of Python in GIS - Florida Chapter IAAO Conference/GIS Python...• “A Python Primer...
Python Scripting: Let the Snake take a bite out of Time
Slithery-Smooth GIS Process Automation
Martin County Property Appraiser’s Office
John Watterson – GIS Specialist
What is Python?
• Free open source programming language used in numerous fields, not just GIS
• Non-profit foundation: www.python.org
• Embraced by ESRI for the long haul
History of Python at the PAO
• Since 2008
• Easy to learn
• Clear and logical syntax
Basic benefits of using Python in ArcGIS
• Saves work time; and therefore money
• Perfect for automating redundant geoprocessing
• No programming experience required
Basic benefits of using Python in ArcGIS continued
• Elimination of human error
• Versatility: Can run in ArcToolbox
• Increased productivity; Scheduled tasks
Return on Investment
• Can be huge
• Martin County Property Appraiser’s Office uses 12 Python Scripts
What the experts are saying
• Adena Schutzberg of Directions Magazine: Scripting = understanding building blocks of GIS
• Jack Dangermond: Python, Python, Python
• Python scripting – A sought-after skill in the GIS job marketplace
• “Yes, You Need to Code” blog article
Starting point for writing scripts
• ArcGIS Desktop Help – A valuable resource
• Locate favorite tools in ArcToolbox and right click
PDF tax maps to web script
Standard lines of Python code
Script finished successfully message
Do the math!
2 hours manually x 12 months =
24 hours saved or 3 working days per year!
PDF tax maps to web script
Value Annotation Script
Do the math!
2 hours manually x 2 times a week x 5.5 month valuation period (22 weeks) =
88 hours saved or 11 working days per year!
Value Annotation Script
Neighborhood script
Do the math!
30 minutes manually x 2 times a year = 1 hour a year
Neighborhood script
CAMA shapefile to web script
CAMA shapefile to web script
45 minutes manually x 12 times a year =
9 hours saved a year or approximately 1 work day per year!
Do the math!
Do the Math!!
With all the scripts we run at the PAO, Python has saved
me 1 month per year!
Python command Line in ArcGIS
• Open right in ArcMap
• Start typing Python commands
• Auto-complete feature
• Walk through help window
Add-ins with Python
• New to ArcGIS 10.1
• Extending the ArcGIS interface
• So what’s next?
Python advantages over ModelBuilder
• Visualization of code
• Model Builder (MB) has no mapping module • Limited in advanced programming methods(MB)
• Run outside of ArcGIS
• Suitable for writing complex script workflows
• More Help
Course resources
• Geospatial Training Services: www.geospatialtraining.com
• ESRI:
www.esri.com/training/main
GIS Python books
• “Python Scripting for ArcGIS”, Zanderbergen
• “A Python Primer for ArcGIS”, Jennings
• “Programming ArcGIS 10.1 with Python Cookbook”, Pimpler
• “Python Geospatial Development”, Westra
• “GIS Tutorial for Python Scripting”, Allen
Questions or Comments