Using Python for everyday GIS tasks Bo Castillo Berkeley County GIS

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Using Python for everyday GIS tasksBo Castillo
Berkeley County GIS
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Why doesnt everyone use Python?

• People assume its beyond their technical ability
• Steep initial learning curve
• Time constraints and the question of where to
  even begin
• Python is still relatively new to users of the
  ESRI suite of products

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Why should I learn Python?

• Saves time and makes your workload easier
• Helps unlock the power of ArcGIS
• Ability to use ArcGIS with other non-ESRI
  functions
• Expectation of GIS professionals

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Pros and Cons of Python

• Easy to create basic scripts
• Very flexible language
• Ability to incorporate other functions
• Limited only by your imagination

• Support isnt very robust
• Steep learning curve
• GIS users of Python appear somewhat limited

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Some examples using Python

• Export data using todays date
• Calling up DOS commands, etc.
• Integrate all into one script and set on a timer

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Part 1Adding todays date to a Python export
script
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1. Build your model in model builder
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2. Export to a Python script
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3. Name and save the Python script
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4. Edit the saved Python Script
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5. View the Python code
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6. Add code for DATE and SAVE as a different
name !!!
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7. Run your new script
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7. Check to see if the script worked
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Part 2Integrating DOS command line functionality
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1. Open up the EXAMPLE_1.py script
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2. Add new DOS command line functions
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3. Run Python script from DOS prompt
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4. Check results of Python script
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Part 3Run Python scripts on a timer
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1. Start Windows Scheduled Tasks
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2. Add Scheduled Task
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3. Click next, then browse, select the Python
script
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4. Set name, frequency, start time, etc.
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5. Enter username/password, then finish
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6. Verify scheduled task
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Comments and Questions