Transcript Intro lecture

GIS Customization I
Binaural recording + reconstructing performances
Holophonics - Virtual Barber Shop
John Q. Walker: Re-creating great performances
Algonquin ArcGIS Customization Courses
GIS Customization I =
ArcPy (Python Package for ArcGIS)
+ .NET, Visual Studio, C# Essentials
+ Intro to ArcObjects
GIS Customzation II =
ArcGIS .NET templates
+ Extending ArcGIS
+ Add-ins
GIS Customization I Course overview
Before study break
Python & ArcGIS 10 (ArcPy)
arcpy.mapping
After study break
Intro to .NET, Visual Studio, & C#
Code modules, functions, strings, file I/O, OOP
Class libraries, console & Windows apps
Intro to ArcObjects
Marking
Quizzes – 4 x 20%
Exercises/participation
50% for working during lab period & providing zip of
progress
Submitting “completed” exercises before next class
+25% if not completed but progress was made since lab period
+25% for completing exercises (working code)
Working in pairs, or not
Benefits of working in pairs to you
1+1=3
One brain working on details (syntax) +
Other brain working on solution and next steps
Ability to work in pairs or groups is an essential attribute for the
work force – standard question for reference calls, letters of
support, etc
Marks-based pairs (highest with highest, lowest with lowest)
Easier for me/better for you to help/mark 10 pairs vs 20 singles
I am asked to be a reference for students
(even if the student doesn’t ask me)
FYI, I don’t lie.
Send me an e-mail if you want to opt out
References
What would you want someone to say about you?
Why customize ArcGIS? Avoid repetition.
Software does exactly what you want but you
don’t want to do it manually dozens or
thousands of times.
Example: Clip 30 feature classes with 6 AOI’s
180 times
OR
< 20 lines of Python code.
Python, ArcGIS, ArcPy, & Geoprocessing
ArcPy is a site-package that builds on
(and is a successor to) the successful 9.3
arcgisscripting module
Provides access to Geoprocessing tools in ArcGIS
Input
Dataset(s)
Output
Dataset(s)
Custom toolboxes
Why customize ArcGIS ? Workflow.
Software does not do EXACTLY what you want to do
“out-of-the-box” but has the programming
infrastructure required to allow you to customize it to
do exactly what you want
Extending ArcGIS, Add-ins, C#, & ArcObjects
Adding toolbars, buttons, tools, etc.
Python could not do this until ArcGIS 10.1 … Python
will never be able to extend ArcGIS like C# and C#
may never be able to extend it like C++
GIS Customization II (GIS4307) will cover extending
ArcGIS with C#
Dev options with ArcGIS
Open Source GIS components
GIS Customization Business
esriDC R&D Center
What can you do with customization?
Python at 2014 Dev Summit
Good talk from 2011 …
2 hrs
GIS Customization I starts here …
Brief intro to ArcPy & the Geoprocessing Framework
ArcGIS – Python integration
ArcGIS 8.x – 9.x
ArcGIS 10.x
Python interpreter/
interactive window
IN ArcGIS
Python ? – 2.5
Python 2.6 - ?
Python in ArcGIS 9.x vs 10.x
ArcGIS 10
ArcGIS 9.3
Python Interactive window in ArcGIS
Options to Save As … / Load
Clear All / Clear selected
Python, ArcGIS, ArcPy, & Geoprocessing
ArcPy introduced at ArcGIS 10
ArcPy site-package
A Python package is a folder containing
Python modules, e.g. mapping, ga (Geostatistical Analyst)
& possibly sub-packages, e.g. sa – (Spatial Analyst)
Quick tour of ArcPy
Geoprocessing tool access
arcpy.Clip_analysis(…*)
arcpy.Buffer_analysis(…*)
Functions
arcpy.ListFeatureClasses()
arcpy.Describe(…*)
Classes
arcpy.SpatialReference(prjFile)
arcpy.Point({X},{Y},{Z},{M},{ID})
Modules & Packages
arcpy.mapping
arcpy.sa
* “…” used instead multiple parameters
Tools vs Functions
CaSe SeNsiTive in ArcGIS 10
Tools
Functions
Documentation
Tool documentation
ArcPy documentation
Returns
result object
Lists, numbers, etc.
Messaging
Tools produce
messages …
arcpy.GetMessages()
No messaging
Availability
Availability depends
on licensing (ArcView,
ArcEditor, ArcInfo)
Availability does not
depend on license
level
result returned from a Tool
Environment settings in ArcGIS 10 / ArcPy
Environment settings affect analysis performed by tools
(workspace, extent, cell size, etc.)
Environment settings in Python using ArcPy
import arcpy
from arcpy import env
# Print the passed-down current workspace environment setting
#
arcpy.AddMessage("The passed-down current workspace is: %s" % env.workspace)
# Set a new workspace, overriding the passed-down workspace
#
env.workspace = "e:/data/script.gdb"
arcpy.AddMessage("The new current workspace is: %s" % env.workspace)
Done