ArcGIS API for Python

43 Pages·2017·6.58 MB·English

ArcGIS API for Python
Mapping and Visualizations in the API (Plus an
Introduction!)
In [ ]:
 What does the typical GIS team member look like?
 Do they look something like this?
 Do they act something like this?
 Fear not, we have a new capability on our hands...
 The ArcGIS API for Python is an exciting new way to
interact with a distributed GIS.
It has the tremendous potential to help every member
of an organization's GIS team by introducing
automation, adding capabilities, and expanding on
what is possible.
 If you are a GIS Administrator, you can use the API to automate tasks relating to
management of users, groups, and items. Free yourself of monotonous
activities.
 If you are a GIS Content Publisher, you can use the API to set up processes that will
automatically publish mass content or easily move content from one Portal to another.
Make your content part of a reliable and frequently updated process.
 If you are a GIS Analyst, you can leverage the API's use of Python and its powerful data
analysis libraries. Enrich your analysis with Python's suite of data science
capabilities.
 If you are a Developer, you can build dashboards and Jupyter Notebook extensions to
customize the capabilities of the API and the tools. Stand up a simple but useful
application in minutes.
 If you don't even use GIS but you are a Data Scientist , you can now connect to a GIS
and use spatial capabilities to enrich and extend your analysis. See what all this "GIS"
buzz is about.
 Before we take a look at specific examples, let's align on
terminology...
Python | Jupyter Notebook | ArcGIS API for
Python
 Python
A family of nonvenomous snakes found in Africa, Asia, and Australia.
A beautiful programming language that emphasizes readibility.
In [ ]: import this
 Python
 Widely adopted in the GIS community.
 Widely adopted in the Data Science community.
 Widely adopted in the Development community.
 Widely adopted everywhere!
 Jupyter Notebook
 Allows Python users to create and share documents containing Live Code in
"cells":
In [2]: print("Hello FedGIS.")
Hello FedGIS.
 Jupyter Notebook
 Cells have all the capabilities of an executable command interface...
In [3]: def chicken_function():
return egg_function()

def egg_function():
return chicken_function()
In [4]: chicken_function()
---------------------------------------------------------------------------
RecursionError Traceback (most recent call last)
<ipython-input-4-0305f3f224c9> in <module>()
----> 1 chicken_function()

<ipython-input-3-a89345d36248> in chicken_function()
1 def chicken_function():
----> 2 return egg_function()
3
4 def egg_function():
5 return chicken_function()

<ipython-input-3-a89345d36248> in egg_function()
3
4 def egg_function():
----> 5 return chicken_function()

... last 2 frames repeated, from the frame below ...

<ipython input 3 a89345d36248> in chicken function()
 Jupyter Notebook
 Cells have all the capabilities of an executable command interface...
In [1]: import time
def return_best_university(all_universities=None):
print("Processing University data...")

time.sleep(1)
print("...")

time.sleep(2)

print("Found corrupt records in data... [Florida State University, University

time.sleep(2)

print("Data cleaned. Now performing analysis...")

time.sleep(1)
print("...")
time.sleep(1)
print("...")
time.sleep(1)
print("...")

time.sleep(1)
print("Determining final rankings on all possible variables...")

time.sleep(2)

print("Solution found...")

print("Solution: University of Florida")
return("University of Florida")
In [5]: # This function contains extensive analysis of academic rankings and overall good
return_best_university()
Processing University data...
...
Found corrupt records in data... [Florida State University, University of Georg
ia]. Cleaning garbage records...
Data cleaned. Now performing analysis...
...
...
...
Determining final rankings on all possible variables...
Solution found...
Solution: University of Florida
Out[5]: 'University of Florida'
 Jupyter Notebook
 Allows Python users to create and share documents containing explanatory text &
documentation
 In fact... this whole presentation was written on a Jupyter
Notebook!
 Jupyter Notebook
 Allows Python users to create and share documents containing visualizations
In [6]: import pandas as pd
import numpy as np

dates = pd.date_range('20130101', periods=6)
dates

df = pd.DataFrame(np.random.randn(6,10), index=dates, columns=list('ABCDEFGHIJ'))
df
Out[6]:
A B C D E F G H
2013-
-0.907160 0.598891 0.268379 -1.357367 1.124579 0.959147 0.361779 -1.078645 -0.0967
01-01
2013-
-0.606378 1.455470 0.087775 2.767302 -0.430668 -1.573610 1.319416 1.423569 0.6788
01-02
2013-
3.086340 1.664543 1.229672 1.429835 0.550282 1.091653 -0.152071 2.173504 0.4830
01-03
2013-
-3.755005 -0.085720 1.925352 0.059352 -1.309952 0.878401 0.434963 -0.746970 -0.4637
01-04
2013-
0.073519 -1.016756 0.142583 -0.100056 0.096224 0.596006 -1.922145 -0.682998 -0.2286
01-05
2013-
-0.734188 -1.372607 0.390529 1.501349 -0.097851 -2.474915 0.679706 0.587010 1.9072
01-06
 Jupyter Notebook
 Allows Python users to create and share documents containing visualizations
In [7]: from arcgis.gis import GIS
my_gis = GIS()
my_gis.map()
 ArcGIS API for Python
An API for your Web GIS.
 ArcGIS API for Python
Demo: Hello World Map
 Let's Get Started With Some Basics...
Let's import the API...
In [4]: import arcgis
from IPython.display import display
This is a GIS object. If we don't pass any parameters, it connects to the default GIS, ArcGIS Online.
In [5]: gis = arcgis.gis.GIS()
In [6]: gis?
In [7]: gis.map?
This object is the entry point to your GIS. This lets you manage users, content, and also has a map
widget:
In [8]: my_map = gis.map("Reston")
The map widget is built on top of the ArcGIS JavaScript API but is added as a Jupyter Notebook
extension.
In [9]: my_map
×
+
–
County of Fairfax, Montgom
That's a map of a cool place, but it's not very useful yet. Let's now search for content.
In [10]: items = gis.content.search("Reston Hiking Trails", "feature layer")
In [11]: items?