Python and GISNobody expects Python in maps!

Andrii V. Mishkovskyi

January 30, 2010

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GIS stands for...

GeographicInformationSystem

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Maps and map services

TilesRoutingGeocodingStaticmaps

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Geolocation

GPS NavigatorsGeotagging (Flickr, Twitter, GeoRSS)

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And also

Historical mappingGeocachingAugmented reality

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GIS involves...

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

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Python advantages

Clean languageLots of existing modulesEasy interaction with C libraries

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Shapely

Wrapper over GEOS libraryBasic geometriesGeometry collectionsFunctions for all geometry operations(intersection, equality, etc.)

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NumPy

Lots of array operationsBest way of converting binary dataFor example, hillshading or heatmaps

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PyProj

Pyrex wrapper over PROJ.4Forward and reverse projectionsGeodetic projections

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Mapnik

Established library for making beautifulmapsWritten in C++Boost.Python interfaceUsed by Flickr, OpenStreetMap,CloudMade and many more

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SQLAlchemy

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

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GeoAlchemy

Small add-on to SQLAlchemySupport of OpenGIS geometriesGeometry functions (AsKML,Intersects, etc.)

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TileCache

Implements WMS-C standardProxy over tile providers (GoogleMaps, OSM, CloudMade)Uses TurboGears

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GeoDjango

Everybody loves DjangoGreat documentationAll in one place, no need to do ityourself

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GIS is fun and geekyLots of cool Python APIs to experimentwithLots of free data to play withPython has all you need for GIS...unless you’re mapping distantplanets

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Links

gispython.orggeodjango.orgmapnik.orgopenstreetmap.org

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Thank you!mishok13@gmail.com

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