Python and GIS

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Andrii Mishkovskyi

Pycamp Kyiv 2010 presentation. Talk about usage of Python in GIS.

Technology

Python and GIS
Nobody expects Python in maps!

Andrii V. Mishkovskyi

January 30, 2010

Andrii V. Mishkovskyi () Python and GIS January 30, 2010 1 / 28

GIS stands for...

Geographic
Information
System

Andrii V. Mishkovskyi () Python and GIS January 30, 2010 2 / 28

Maps and map services

Tiles
Routing
Geocoding
Staticmaps

Andrii V. Mishkovskyi () Python and GIS January 30, 2010 3 / 28

Geolocation

GPS Navigators
Geotagging (Flickr, Twitter, GeoRSS)

Andrii V. Mishkovskyi () Python and GIS January 30, 2010 4 / 28

And also

Historical mapping
Geocaching
Augmented reality

Andrii V. Mishkovskyi () Python and GIS January 30, 2010 5 / 28

GIS involves...

Math (analytic geometry)
Computer graphics (rendering)
Databases (GiST, OpenGIS spec)

Andrii V. Mishkovskyi () Python and GIS January 30, 2010 6 / 28

Python advantages

Clean language
Lots of existing modules
Easy interaction with C libraries

Andrii V. Mishkovskyi () Python and GIS January 30, 2010 7 / 28

Shapely

Wrapper over GEOS library
Basic geometries
Geometry collections
Functions for all geometry operations
(intersection, equality, etc.)

Andrii V. Mishkovskyi () Python and GIS January 30, 2010 8 / 28

NumPy

Lots of array operations
Best way of converting binary data
For example, hillshading or heatmaps

Andrii V. Mishkovskyi () Python and GIS January 30, 2010 10 / 28

PyProj

Pyrex wrapper over PROJ.4
Forward and reverse projections
Geodetic projections

Andrii V. Mishkovskyi () Python and GIS January 30, 2010 12 / 28

Mapnik

Established library for making beautiful
maps
Written in C++
Boost.Python interface
Used by Flickr, OpenStreetMap,
CloudMade and many more

Andrii V. Mishkovskyi () Python and GIS January 30, 2010 16 / 28

SQLAlchemy

Best ORM ever
Access to almost any existing RDBMS
...but not really suitable for GIS stuff

Andrii V. Mishkovskyi () Python and GIS January 30, 2010 21 / 28

GeoAlchemy

Small add-on to SQLAlchemy
Support of OpenGIS geometries
Geometry functions (AsKML,
Intersects, etc.)

Andrii V. Mishkovskyi () Python and GIS January 30, 2010 22 / 28

TileCache

Implements WMS-C standard
Proxy over tile providers (Google
Maps, OSM, CloudMade)
Uses TurboGears

Andrii V. Mishkovskyi () Python and GIS January 30, 2010 23 / 28

GeoDjango

Everybody loves Django
Great documentation
All in one place, no need to do it
yourself

Andrii V. Mishkovskyi () Python and GIS January 30, 2010 25 / 28

GIS is fun and geeky
Lots of cool Python APIs to experiment
with
Lots of free data to play with
Python has all you need for GIS
...unless you’re mapping distant
planets

Andrii V. Mishkovskyi () Python and GIS January 30, 2010 26 / 28

Links

gispython.org
geodjango.org
mapnik.org
openstreetmap.org

Andrii V. Mishkovskyi () Python and GIS January 30, 2010 27 / 28

Thank you!
mishok13@gmail.com

Andrii V. Mishkovskyi () Python and GIS January 30, 2010 28 / 28

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Python and GIS

1. Python and GIS Nobody expects Python in maps! Andrii V. Mishkovskyi January 30, 2010 Andrii V. Mishkovskyi () Python and GIS January 30, 2010 1 / 28

2. GIS stands for... Geographic Information System Andrii V. Mishkovskyi () Python and GIS January 30, 2010 2 / 28

3. Maps and map services Tiles Routing Geocoding Staticmaps Andrii V. Mishkovskyi () Python and GIS January 30, 2010 3 / 28

4. Geolocation GPS Navigators Geotagging (Flickr, Twitter, GeoRSS) Andrii V. Mishkovskyi () Python and GIS January 30, 2010 4 / 28

5. And also Historical mapping Geocaching Augmented reality Andrii V. Mishkovskyi () Python and GIS January 30, 2010 5 / 28

6. GIS involves... Math (analytic geometry) Computer graphics (rendering) Databases (GiST, OpenGIS spec) Andrii V. Mishkovskyi () Python and GIS January 30, 2010 6 / 28

7. Python advantages Clean language Lots of existing modules Easy interaction with C libraries Andrii V. Mishkovskyi () Python and GIS January 30, 2010 7 / 28

8. Shapely Wrapper over GEOS library Basic geometries Geometry collections Functions for all geometry operations (intersection, equality, etc.) Andrii V. Mishkovskyi () Python and GIS January 30, 2010 8 / 28

10. NumPy Lots of array operations Best way of converting binary data For example, hillshading or heatmaps Andrii V. Mishkovskyi () Python and GIS January 30, 2010 10 / 28

11.

12. PyProj Pyrex wrapper over PROJ.4 Forward and reverse projections Geodetic projections Andrii V. Mishkovskyi () Python and GIS January 30, 2010 12 / 28

13.

14.

15.

16. Mapnik Established library for making beautiful maps Written in C++ Boost.Python interface Used by Flickr, OpenStreetMap, CloudMade and many more Andrii V. Mishkovskyi () Python and GIS January 30, 2010 16 / 28

17.

18.

19.

20.

21. SQLAlchemy Best ORM ever Access to almost any existing RDBMS ...but not really suitable for GIS stuff Andrii V. Mishkovskyi () Python and GIS January 30, 2010 21 / 28

22. GeoAlchemy Small add-on to SQLAlchemy Support of OpenGIS geometries Geometry functions (AsKML, Intersects, etc.) Andrii V. Mishkovskyi () Python and GIS January 30, 2010 22 / 28

23. TileCache Implements WMS-C standard Proxy over tile providers (Google Maps, OSM, CloudMade) Uses TurboGears Andrii V. Mishkovskyi () Python and GIS January 30, 2010 23 / 28

24.

25. GeoDjango Everybody loves Django Great documentation All in one place, no need to do it yourself Andrii V. Mishkovskyi () Python and GIS January 30, 2010 25 / 28

26. GIS is fun and geeky Lots of cool Python APIs to experiment with Lots of free data to play with Python has all you need for GIS ...unless you’re mapping distant planets Andrii V. Mishkovskyi () Python and GIS January 30, 2010 26 / 28

27. Links gispython.org geodjango.org mapnik.org openstreetmap.org Andrii V. Mishkovskyi () Python and GIS January 30, 2010 27 / 28

28. Thank you! mishok13@gmail.com Andrii V. Mishkovskyi () Python and GIS January 30, 2010 28 / 28

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