• Focus on ArcPy, not scripting
  • Go back to Jupyter notebooks
  • Ditch things you can do with spatial dataframes
  • More on raster calculations
  • Why learn ArcPy??

Proficiencies

  • Extending Python

    • Conda/Pip
    • ArcPy, Pandas, GeoPandas, ArcGIS API

  • ArcPy

    • Using geoprocessing tools
    • Classes & Functions
    • Modules

ArcGIS Python Libraries

https://www.esri.com/en-us/arcgis/products/arcgis-python-libraries/libraries/arcpy

https://pro.arcgis.com/en/pro-app/latest/arcpy/get-started/installing-python-for-arcgis-pro.htm

Uses

  • Automating workflows
    • More control over execution
  • Extending analyses
    • Python = glue

ArcPy

https://pro.arcgis.com/en/pro-app/latest/arcpy/get-started/what-is-arcpy-.htm

Much finer control of tool execution

  • Tool usage & results
    • Exercise: Run a tool
    • Exercise: Run a workflow
  • Environment settings
  • Function
  • Classes
  • Modules
    • Toolbox
    • Helpers
      • Charts
      • Data Access
      • Image Analysis

4.1 Intro to ArcPy

Jupyter notebooks in ArcGIS Pro

  • Access to layers in map
  • Tool autofill & getting other help
  • Converting history to Python
  • WHAT DOES ARCPY DO? WHY USEFUL?

ArcPy - an overview

  • Geoprocessing tools
  • Additional functions and classes
  • Links to other Python libraries

GIS Workflows with ArcPy

  • LiDAR fetching tool
  • [Other tools I’ve created? MaxEnt? GeoHAT?]
  • Demos with ArcGIS API

Section Outline: Hurricane Mapping tool

  • First a notebook, then a script tool
  • Flow of a notebook: packages, data [paths], processing, results
  • Notebook to script
  • Script to tool

4.2 Hurricane Tracking in Jupyter

4.2.1 - Setup

  • Project folder structure
  • Notebook creation and front matter
  • Packages
  • Data
    • Relative paths!

4.2.2 Processes

  • Select
  • Point to line
  • Select by location
  • Copy features

4.2.3

  • Add variables
  • Widgets!

4.3 Creating a script based tool

4.3.1 Notebook to script|Noteboook vs script

  • Code cells to script sections

4.3.2 Adding a script based tool to ArcGIS Pro

  • Parameters
    • GetParameterAsText
  • Environments
  • Messages

Lab: Hurricane Tracker - Revisited

Jupyter Notebook (in ArcGIS Pro vs separate)

  • Markdown - describe workflow
  • Import packages
  • Set data paths [pathlib]
    • Input
    • Output
  • Set variables
  • Process 1: Select records [ArcPy]
  • Process 2: Point to Line
  • Process 3: Select counties that intersect the track

Embellishments

  • Summarize output: pyArrow
  • Create chart
  • Widgets to select input & output
    • Need to create lists: all years, and storm for a given year

Ideas

  • User puts in a range of years, create plot of # of people affected by year (by state)

Python Script tool

  • Jupyter -> Python
  • Add tool to ArcGIS Pro
  • Inputs: GetParameterAsText()
  • Outputs: SetParameterAsText()

Assignment - ArcGIS Pro tool

Goals

  • Run a geoprocessing workflow in a notebook
    • Relative path to data
    • Use dynamic inputs

Scenario

  • Malaria case rates for provinces in Loreto, Peru from 2000-2020
  • Specify a province, year range, and a buffer distance
  • Compute the mean case rate
  • Create a plot of weekly malaria case rates for the selected province
  • Identify all provinces within the buffer distance of the selected province
  • Compute mean case rate and compare to that of the selected province

Additional ArcPy topics