530 lines
18 KiB
Plaintext
530 lines
18 KiB
Plaintext
======================
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GeoDjango Installation
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======================
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.. highlight:: console
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Overview
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========
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In general, GeoDjango installation requires:
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1. :ref:`Python and Django <django>`
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2. :ref:`spatial_database`
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3. :doc:`geolibs`
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Details for each of the requirements and installation instructions
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are provided in the sections below. In addition, platform-specific
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instructions are available for:
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* :ref:`macosx`
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* :ref:`windows`
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.. admonition:: Use the Source
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Because GeoDjango takes advantage of the latest in the open source geospatial
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software technology, recent versions of the libraries are necessary.
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If binary packages aren't available for your platform, installation from
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source may be required. When compiling the libraries from source, please
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follow the directions closely, especially if you're a beginner.
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Requirements
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============
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.. _django:
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Python and Django
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-----------------
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Because GeoDjango is included with Django, please refer to Django's
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:ref:`installation instructions <installing-official-release>` for details on
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how to install.
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.. _spatial_database:
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Spatial database
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----------------
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PostgreSQL (with PostGIS), MySQL (mostly with MyISAM engine), Oracle, and SQLite
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(with SpatiaLite) are the spatial databases currently supported.
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.. note::
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PostGIS is recommended, because it is the most mature and feature-rich
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open source spatial database.
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The geospatial libraries required for a GeoDjango installation depends
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on the spatial database used. The following lists the library requirements,
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supported versions, and any notes for each of the supported database backends:
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================== ============================== ================== =========================================
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Database Library Requirements Supported Versions Notes
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================== ============================== ================== =========================================
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PostgreSQL GEOS, PROJ.4, PostGIS 9.0+ Requires PostGIS.
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MySQL GEOS 5.5+ Not OGC-compliant; :ref:`limited functionality <mysql-spatial-limitations>`.
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Oracle GEOS 11.1+ XE not supported.
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SQLite GEOS, GDAL, PROJ.4, SpatiaLite 3.6.+ Requires SpatiaLite 2.3+, pysqlite2 2.5+
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================== ============================== ================== =========================================
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See also `this comparison matrix`__ on the OSGeo Wiki for
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PostgreSQL/PostGIS/GEOS/GDAL possible combinations.
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__ http://trac.osgeo.org/postgis/wiki/UsersWikiPostgreSQLPostGIS
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Installation
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============
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Geospatial libraries
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--------------------
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.. toctree::
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:maxdepth: 1
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geolibs
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Database installation
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---------------------
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.. toctree::
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:maxdepth: 1
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postgis
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spatialite
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Add ``django.contrib.gis`` to :setting:`INSTALLED_APPS`
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-------------------------------------------------------
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Like other Django contrib applications, you will *only* need to add
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:mod:`django.contrib.gis` to :setting:`INSTALLED_APPS` in your settings.
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This is the so that ``gis`` templates can be located -- if not done, then
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features such as the geographic admin or KML sitemaps will not function properly.
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.. _addgoogleprojection:
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Add Google projection to ``spatial_ref_sys`` table
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--------------------------------------------------
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.. note::
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If you're running GDAL 1.7 or above (most users), you can skip this step.
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In order to conduct database transformations to the so-called "Google"
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projection (a spherical mercator projection used by Google Maps),
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an entry must be added to your spatial database's ``spatial_ref_sys`` table.
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Invoke the Django shell from your project and execute the
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``add_srs_entry`` function:
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.. code-block:: pycon
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$ python manage.py shell
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>>> from django.contrib.gis.utils import add_srs_entry
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>>> add_srs_entry(900913)
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This adds an entry for the 900913 SRID to the ``spatial_ref_sys`` (or equivalent)
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table, making it possible for the spatial database to transform coordinates in
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this projection. You only need to execute this command *once* per spatial database.
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Troubleshooting
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===============
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If you can't find the solution to your problem here then participate in the
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community! You can:
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* Join the ``#geodjango`` IRC channel on Freenode. Please be patient and polite
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-- while you may not get an immediate response, someone will attempt to answer
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your question as soon as they see it.
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* Ask your question on the `GeoDjango`__ mailing list.
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* File a ticket on the `Django trac`__ if you think there's a bug. Make
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sure to provide a complete description of the problem, versions used,
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and specify the component as "GIS".
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__ https://groups.google.com/d/forum/geodjango
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__ https://code.djangoproject.com/newticket
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.. _libsettings:
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Library environment settings
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----------------------------
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By far, the most common problem when installing GeoDjango is that the
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external shared libraries (e.g., for GEOS and GDAL) cannot be located. [#]_
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Typically, the cause of this problem is that the operating system isn't aware
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of the directory where the libraries built from source were installed.
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In general, the library path may be set on a per-user basis by setting
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an environment variable, or by configuring the library path for the entire
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system.
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``LD_LIBRARY_PATH`` environment variable
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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A user may set this environment variable to customize the library paths
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they want to use. The typical library directory for software
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built from source is ``/usr/local/lib``. Thus, ``/usr/local/lib`` needs
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to be included in the ``LD_LIBRARY_PATH`` variable. For example, the user
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could place the following in their bash profile::
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export LD_LIBRARY_PATH=/usr/local/lib
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Setting system library path
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^^^^^^^^^^^^^^^^^^^^^^^^^^^
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On GNU/Linux systems, there is typically a file in ``/etc/ld.so.conf``, which may include
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additional paths from files in another directory, such as ``/etc/ld.so.conf.d``.
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As the root user, add the custom library path (like ``/usr/local/lib``) on a
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new line in ``ld.so.conf``. This is *one* example of how to do so::
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$ sudo echo /usr/local/lib >> /etc/ld.so.conf
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$ sudo ldconfig
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For OpenSolaris users, the system library path may be modified using the
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``crle`` utility. Run ``crle`` with no options to see the current configuration
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and use ``crle -l`` to set with the new library path. Be *very* careful when
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modifying the system library path::
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# crle -l $OLD_PATH:/usr/local/lib
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.. _binutils:
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Install ``binutils``
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^^^^^^^^^^^^^^^^^^^^
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GeoDjango uses the ``find_library`` function (from the ``ctypes.util`` Python
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module) to discover libraries. The ``find_library`` routine uses a program
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called ``objdump`` (part of the ``binutils`` package) to verify a shared
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library on GNU/Linux systems. Thus, if ``binutils`` is not installed on your
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Linux system then Python's ctypes may not be able to find your library even if
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your library path is set correctly and geospatial libraries were built perfectly.
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The ``binutils`` package may be installed on Debian and Ubuntu systems using the
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following command::
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$ sudo apt-get install binutils
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Similarly, on Red Hat and CentOS systems::
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$ sudo yum install binutils
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Platform-specific instructions
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==============================
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.. _macosx:
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Mac OS X
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--------
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Because of the variety of packaging systems available for OS X, users have
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several different options for installing GeoDjango. These options are:
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* :ref:`homebrew`
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* :ref:`kyngchaos`
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* :ref:`fink`
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* :ref:`macports`
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* :ref:`build_from_source`
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.. note::
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Currently, the easiest and recommended approach for installing GeoDjango
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on OS X is to use the KyngChaos packages.
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This section also includes instructions for installing an upgraded version
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of :ref:`macosx_python` from packages provided by the Python Software
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Foundation, however, this is not required.
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.. _macosx_python:
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Python
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^^^^^^
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Although OS X comes with Python installed, users can use framework
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installers (`2.7`__, `3.2`__ and `3.3`__ are available) provided by
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the Python Software Foundation. An advantage to using the installer is
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that OS X's Python will remain "pristine" for internal operating system
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use.
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__ https://python.org/ftp/python/2.7.5/
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__ https://python.org/ftp/python/3.2.5/
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__ https://python.org/ftp/python/3.3.2/
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.. note::
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You will need to modify the ``PATH`` environment variable in your
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``.profile`` file so that the new version of Python is used when
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``python`` is entered at the command-line::
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export PATH=/Library/Frameworks/Python.framework/Versions/Current/bin:$PATH
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.. _homebrew:
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Homebrew
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^^^^^^^^
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`Homebrew`__ provides "recipes" for building binaries and packages from source.
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It provides recipes for the GeoDjango prerequisites on Macintosh computers
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running OS X. Because Homebrew still builds the software from source, the
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`Apple Developer Tools`_ are required.
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Summary::
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$ brew install postgresql
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$ brew install postgis
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$ brew install gdal
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$ brew install libgeoip
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__ http://brew.sh/
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.. _Apple Developer Tools: https://developer.apple.com/technologies/tools/
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.. _kyngchaos:
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KyngChaos packages
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^^^^^^^^^^^^^^^^^^
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William Kyngesburye provides a number of `geospatial library binary packages`__
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that make it simple to get GeoDjango installed on OS X without compiling
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them from source. However, the `Apple Developer Tools`_ are still necessary
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for compiling the Python database adapters :ref:`psycopg2_kyngchaos` (for PostGIS)
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and :ref:`pysqlite2` (for SpatiaLite).
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.. note::
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SpatiaLite users should consult the :ref:`spatialite_macosx` section
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after installing the packages for additional instructions.
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Download the framework packages for:
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* UnixImageIO
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* PROJ
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* GEOS
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* SQLite3 (includes the SpatiaLite library)
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* GDAL
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Install the packages in the order they are listed above, as the GDAL and SQLite
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packages require the packages listed before them.
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Afterwards, you can also install the KyngChaos binary packages for `PostgreSQL
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and PostGIS`__.
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After installing the binary packages, you'll want to add the following to
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your ``.profile`` to be able to run the package programs from the command-line::
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export PATH=/Library/Frameworks/UnixImageIO.framework/Programs:$PATH
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export PATH=/Library/Frameworks/PROJ.framework/Programs:$PATH
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export PATH=/Library/Frameworks/GEOS.framework/Programs:$PATH
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export PATH=/Library/Frameworks/SQLite3.framework/Programs:$PATH
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export PATH=/Library/Frameworks/GDAL.framework/Programs:$PATH
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export PATH=/usr/local/pgsql/bin:$PATH
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__ http://www.kyngchaos.com/software/frameworks
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__ http://www.kyngchaos.com/software/postgres
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.. _psycopg2_kyngchaos:
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psycopg2
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~~~~~~~~
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After you've installed the KyngChaos binaries and modified your ``PATH``, as
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described above, ``psycopg2`` may be installed using the following command::
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$ pip install psycopg2
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.. note::
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If you don't have ``pip``, follow the :ref:`installation instructions
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<installing-official-release>` to install it.
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.. _fink:
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Fink
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^^^^
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`Kurt Schwehr`__ has been gracious enough to create GeoDjango packages for users
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of the `Fink`__ package system. `Different packages are available`__ (starting
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with "django-gis"), depending on which version of Python you want to use.
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__ http://schwehr.org/blog/
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__ http://www.finkproject.org/
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__ http://pdb.finkproject.org/pdb/browse.php?summary=django-gis
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.. _macports:
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MacPorts
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^^^^^^^^
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`MacPorts`__ may be used to install GeoDjango prerequisites on Macintosh
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computers running OS X. Because MacPorts still builds the software from source,
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the `Apple Developer Tools`_ are required.
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Summary::
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$ sudo port install postgresql93-server
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$ sudo port install geos
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$ sudo port install proj
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$ sudo port install postgis
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$ sudo port install gdal +geos
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$ sudo port install libgeoip
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.. note::
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You will also have to modify the ``PATH`` in your ``.profile`` so
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that the MacPorts programs are accessible from the command-line::
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export PATH=/opt/local/bin:/opt/local/lib/postgresql93/bin
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In addition, add the ``DYLD_FALLBACK_LIBRARY_PATH`` setting so that
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the libraries can be found by Python::
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export DYLD_FALLBACK_LIBRARY_PATH=/opt/local/lib:/opt/local/lib/postgresql93
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__ http://www.macports.org/
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.. _windows:
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Windows
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-------
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Proceed through the following sections sequentially in order to install
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GeoDjango on Windows.
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.. note::
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These instructions assume that you are using 32-bit versions of
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all programs. While 64-bit versions of Python and PostgreSQL 9.x
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are available, 64-bit versions of spatial libraries, like
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GEOS and GDAL, are not yet provided by the :ref:`OSGeo4W` installer.
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Python
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^^^^^^
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First, download the latest `Python 2.7 installer`__ from the Python Web site.
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Next, run the installer and keep the defaults -- for example, keep
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'Install for all users' checked and the installation path set as
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``C:\Python27``.
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.. note::
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You may already have a version of Python installed in ``C:\python`` as ESRI
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products sometimes install a copy there. *You should still install a
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fresh version of Python 2.7.*
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__ https://python.org/download/
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PostgreSQL
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^^^^^^^^^^
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First, download the latest `PostgreSQL 9.x installer`__ from the
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`EnterpriseDB`__ Web site. After downloading, simply run the installer,
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follow the on-screen directions, and keep the default options unless
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you know the consequences of changing them.
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.. note::
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The PostgreSQL installer creates both a new Windows user to be the
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'postgres service account' and a ``postgres`` database superuser
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You will be prompted once to set the password for both accounts --
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make sure to remember it!
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When the installer completes, it will ask to launch the Application Stack
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Builder (ASB) on exit -- keep this checked, as it is necessary to
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install :ref:`postgisasb`.
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.. note::
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If installed successfully, the PostgreSQL server will run in the
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background each time the system as started as a Windows service.
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A :menuselection:`PostgreSQL 9.x` start menu group will created
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and contains shortcuts for the ASB as well as the 'SQL Shell',
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which will launch a ``psql`` command window.
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__ http://www.enterprisedb.com/products-services-training/pgdownload
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__ http://www.enterprisedb.com
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.. _postgisasb:
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PostGIS
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^^^^^^^
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From within the Application Stack Builder (to run outside of the installer,
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:menuselection:`Start --> Programs --> PostgreSQL 9.x`), select
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:menuselection:`PostgreSQL Database Server 9.x on port 5432` from the drop down
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menu. Next, expand the :menuselection:`Categories --> Spatial Extensions` menu
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tree and select :menuselection:`PostGIS 1.5 for PostgreSQL 9.x`.
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After clicking next, you will be prompted to select your mirror, PostGIS
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will be downloaded, and the PostGIS installer will begin. Select only the
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default options during install (e.g., do not uncheck the option to create a
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default PostGIS database).
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.. note::
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You will be prompted to enter your ``postgres`` database superuser
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password in the 'Database Connection Information' dialog.
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psycopg2
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^^^^^^^^
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The ``psycopg2`` Python module provides the interface between Python and the
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PostgreSQL database. Download the latest `Windows installer`__ for your version
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of Python and PostgreSQL and run using the default settings. [#]_
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__ http://www.stickpeople.com/projects/python/win-psycopg/
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.. _osgeo4w:
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OSGeo4W
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^^^^^^^
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The `OSGeo4W installer`_ makes it simple to install the PROJ.4, GDAL, and GEOS
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libraries required by GeoDjango. First, download the `OSGeo4W installer`_,
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and run it. Select :menuselection:`Express Web-GIS Install` and click next.
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In the 'Select Packages' list, ensure that GDAL is selected; MapServer and
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Apache are also enabled by default, but are not required by GeoDjango and
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may be unchecked safely. After clicking next, the packages will be
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automatically downloaded and installed, after which you may exit the
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installer.
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.. _OSGeo4W installer: http://trac.osgeo.org/osgeo4w/
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Modify Windows environment
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^^^^^^^^^^^^^^^^^^^^^^^^^^
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In order to use GeoDjango, you will need to add your Python and OSGeo4W
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directories to your Windows system ``Path``, as well as create ``GDAL_DATA``
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and ``PROJ_LIB`` environment variables. The following set of commands,
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executable with ``cmd.exe``, will set this up:
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.. code-block:: bat
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set OSGEO4W_ROOT=C:\OSGeo4W
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set PYTHON_ROOT=C:\Python27
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set GDAL_DATA=%OSGEO4W_ROOT%\share\gdal
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set PROJ_LIB=%OSGEO4W_ROOT%\share\proj
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set PATH=%PATH%;%PYTHON_ROOT%;%OSGEO4W_ROOT%\bin
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reg ADD "HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Environment" /v Path /t REG_EXPAND_SZ /f /d "%PATH%"
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reg ADD "HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Environment" /v GDAL_DATA /t REG_EXPAND_SZ /f /d "%GDAL_DATA%"
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reg ADD "HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Environment" /v PROJ_LIB /t REG_EXPAND_SZ /f /d "%PROJ_LIB%"
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For your convenience, these commands are available in the executable batch
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script, :download:`geodjango_setup.bat`.
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.. note::
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Administrator privileges are required to execute these commands.
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To do this, right-click on :download:`geodjango_setup.bat` and select
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:menuselection:`Run as administrator`. You need to log out and log back in again
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for the settings to take effect.
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.. note::
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If you customized the Python or OSGeo4W installation directories,
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then you will need to modify the ``OSGEO4W_ROOT`` and/or ``PYTHON_ROOT``
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variables accordingly.
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Install Django and set up database
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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Finally, :ref:`install Django <installing-official-release>` on your system.
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.. rubric:: Footnotes
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.. [#] GeoDjango uses the :func:`~ctypes.util.find_library` routine from
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``ctypes.util`` to locate shared libraries.
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.. [#] The ``psycopg2`` Windows installers are packaged and maintained by
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`Jason Erickson <http://www.stickpeople.com/projects/python/win-psycopg/>`_.
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