{"id":582,"date":"2019-05-17T18:29:52","date_gmt":"2019-05-17T12:59:52","guid":{"rendered":"http:\/\/blog.nuventure.in\/?p=582"},"modified":"2023-04-03T18:56:49","modified_gmt":"2023-04-03T13:26:49","slug":"geodjango","status":"publish","type":"post","link":"https:\/\/nuventureconnect.com\/blog\/2019\/05\/17\/geodjango\/","title":{"rendered":"GeoDjango"},"content":{"rendered":"\n

GeoDjango is an included contrib module to make easy GIS (Geographic Information System) web apps with location-based services. GeoDjango provides a toolbox of utilities for building GIS web applications and also bindings to popular spatial libraries such as GEOS, GDAL, and GeoIP, which can be used separately without Django in any Python application or interactively in the shell.<\/p>\n\n\n\n

Let’s get started by installing Python 3.<\/p>\n\n\n\n

$ python3 --version
<\/pre>\n\n\n\n
Now let’s install GeoDjango dependencies by running the following commands.<\/p>\n\n\n\n
$ sudo aptitude install gdal-bin libgdal-dev 
$ sudo aptitude install python3-gdal 
<\/pre>\n\n\n\n
Now, we have to create spatial databases. PostGIS 2 ships with PostgreSQL as an extension for spatial functionality. Geodjango also supports Sqlite (via Spatialite), MySql and Oracle backends.<\/p>\n\n\n\n
$ createdb  <db name> 
$ psql <db name> 
> CREATE EXTENSION postgis;
<\/strong><\/pre>\n\n\n\n
Let’s now get started with our project. Let’s call our project geodjango<\/em> by running:<\/p>\n\n\n\n
$ django-admin startproject geodjango<\/pre>\n\n\n\n
This will initialize the project. Now, we can create a django project within our project.<\/p>\n\n\n\n
$ cd geodjango 
$ python manage.py startapp world<\/pre>\n\n\n\n
Let’s edit the database connection in geodjango\/settings.py<\/em> to match our setup.<\/p>\n\n\n\n
DATABASES = {
     'default': {
          'ENGINE': 'django.contrib.gis.db.backends.postgis',
          'NAME': 'geodjango',
          'USER': 'geo',
     },
 }<\/pre>\n\n\n\n
In addition, modify the INSTALLED_APPS<\/code><\/a> setting to include django.contrib.admin<\/code><\/a>, django.contrib.gis<\/code><\/a>, and world<\/code> (your newly created application):<\/p>\n\n\n\n
INSTALLED_APPS = [
     'django.contrib.admin',
     'django.contrib.auth',
     'django.contrib.contenttypes',
     'django.contrib.sessions',
     'django.contrib.messages',
     'django.contrib.staticfiles',
     'django.contrib.gis',
     'world',
 ]<\/pre>\n\n\n\n
Geographic Data<\/p>\n\n\n\n
World Borders<\/p>\n\n\n\n
We can avail the data of the world borders from Here.<\/a> Let’s create a data directory in the world application, download the world borders data, and unzip. Use the following commands:<\/p>\n\n\n\n
$ mkdir world\/data\n$ cd world\/data\n$ wget https:\/\/thematicmapping.org\/downloads\/TM_WORLD_BORDERS-0.3.zip\n$ unzip TM_WORLD_BORDERS-0.3.zip\n$ cd ..\/..<\/code><\/pre>\n\n\n\n
The world borders ZIP file contains a set of data files which is one of the most popular geospatial data formats known as an ESRI Shapefile<\/a>.  When unzipped, the world borders dataset includes files with the following extensions:<\/p>\n\n\n\n