Geotalk presentation

INTRO TO GEODJANGOThat’s the Django Pony. And I’m Eric Palakovich Carr.

THE TALKING POINTS• Installing and Conﬁguring PostGIS• Setting up a GeoDjango project• GeoDjango Model + Django Admin• Loading ESRI (ArcGIS) data• Spatial Queries in Django’s ORM• GeoDjango + Google Maps• ...and more!

INSTALLING POSTGIS• OSX • http://www.kyngchaos.com/software:postgres• Ubuntu > Lucid • Apt-get for PostgreSQL and PostGIS• Ubuntu = Lucid • http://pastebin.com/rTDnhCdq

SETTING UP POSTGIS• Create the PostGIS template in your PostgreSQL database • See last block in http://pastebin.com/rTDnhCdq for tips

LET’S CODE!https://github.com/bigsassy/weloveponies_blank

GIS DATUMS & PROJECTIONS Datum X-Coordinate Y-Coordinate NAD_1927 -122.466903686523 48.7440490722656 NAD_1983 -122.46818353793 48.7438798543649 WGS_1984 -122.46818353793 48.7438798534299

TWO DIFFERENT DATUMS

HOORAY! BACK TO CODE!

KEY LEGAL TAKEAWAYS WITH GOOGLE MAPS (IANAL!)• http://code.google.com/apis/maps/terms.html• Must be free, but you can require logins.• The API requires you to report things sometimes (like if you’re using a sensor)• Link to Googles Terms of Use• Explicitly state in your Maps API Implementations terms of use that, by using your Maps API Implementation, your users are agreeing to be bound by Googles Terms of Use• You can pre-fetch, cache, or store api data for improving the performance of your Maps API implementation, as long as it’s temporary, securely, and in a manner that does not permit use of the Content outside of your service

GOOGLE MAP ALTERNATIVES• Bing Maps: http://www.microsoft.com/maps/developers/ web.aspx• MapQuest: http://developer.mapquest.com/• OpenStreetMaps: http://leaﬂet.cloudmade.com/

DONE? GET BACK TO IT!

HLS COLOR TRICKBase Color: RGB(0, 255, 0) HLS: (0.333..., 0.5, 1)L = 0.15 L = 0.92

CODE CODE CODE CODE CODE CODE CODE...

IT’S OVER!• Eric Palakovich Carr• @bigsassy• gplus.to/bigsassy

Geotalk presentation

by Eric Palakovich Carr

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