Introduction to GeoDjano. Django Weekend Cardiff

1. GeoDjango:
Putting Django on the Map
Sunday, 9 February 2014

2. Tobler’s First Law of Geography:
"Everything is related to everything
else, but near things are more
related than distant things."
Tobler, W. (1970) "A computer movie simulating urban growth in the Detroit region". Economic
Geography, 46(2): 234-240.
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4. Here be dragons
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7. •
Install PostGIS (postgis.net/install/)
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You can use other dbs, but...
Install libraries (docs.djangoproject.com/...)
Add django.contrib.gis to INSTALLED_APPS and you’re hot
to trot
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8. Defining GeoDjango Models
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9. Creating Geographically Related Instances
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10. One advantage of modelling geographic relationships this way:
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11. What’s in the database?
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12. GEOS Instances
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13. Using Spatial Relationships
Possible places to check in
Nearest restaurant
Within user-defined area
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14. The closest bar I’ve been to before
The most popular bar in London
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15. Lookup Type
bbcontains
bboverlaps
contained
contains
contains_properly
coveredby
covers
crosses
disjoint
distance_gt
distance_gte
distance_lt
distance_lte
dwithin
equals
exact
intersects
overlaps
relate
same_as
touches
within
left
right
overlaps_left
overlaps_right
overlaps_above
overlaps_below
strictly_above
strictly_below
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16. Time to output for the web
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17. The Admin Interface
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18. https://www.sharegeo.ac.uk/
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21. Postcodes
https://github.com/gareth-lloyd/postcode_latlng
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22. Thank you!
London Django Coding Session - Biweekly
Hosted by:
Conversocial - always hiring Django people
@godawful
glloyd@gmail.com
Sunday, 9 February 2014