Slides from GeoDjango talk given by Eric Palakovich Carr. Last given in Washington, D.C. for django-district meetup on July 27th, 2011. http://www.meetup.com/django-district/events/16015696/ Source code hosted on github: https://github.com/bigsassy/geodjango_talk

1. INTRO TO GEODJANGO
That’s the Django Pony. And I’m Eric Palakovich Carr.

2. 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!

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

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

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

6. 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

7. TWO DIFFERENT DATUMS

8. HOORAY! BACK TO CODE!

9. 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 Google's Terms of Use
• Explicitly state in your Maps API Implementation's terms of use that, by using your Maps API
Implementation, your users are agreeing to be bound by Google's 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

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

11. DONE? GET BACK TO IT!

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

13. CODE CODE CODE CODE
CODE CODE CODE...

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