1 Importing a new database
2 ========================
4 The following instructions explain how to create a Nominatim database
5 from an OSM planet file and how to keep the database up to date. It
6 is assumed that you have already sucessfully installed the Nominatim
7 software itself, if not return to the [installation page](Installation.md).
9 Configuration setup in settings/local.php
10 -----------------------------------------
12 There are lots of configuration settings you can tweak. Have a look
13 at `settings/settings.php` for a full list. Most should have a sensible default.
14 If you plan to import a large dataset (e.g. Europe, North America, planet),
15 you should also enable flatnode storage of node locations. With this
16 setting enabled, node coordinates are stored in a simple file instead
17 of the database. This will save you import time and disk storage.
18 Add to your settings/local.php:
20 @define('CONST_Osm2pgsql_Flatnode_File', '/path/to/flatnode.file');
22 Replace the second part with a suitable path on your system and make sure
23 the directory exists. There should be at least 35GB of free space.
25 Downloading additional data
26 ---------------------------
28 ### Wikipedia rankings
30 Wikipedia can be used as an optional auxiliary data source to help indicate
31 the importance of osm features. Nominatim will work without this information
32 but it will improve the quality of the results if this is installed.
33 This data is available as a binary download:
35 cd $NOMINATIM_SOURCE_DIR/data
36 wget http://www.nominatim.org/data/wikipedia_article.sql.bin
37 wget http://www.nominatim.org/data/wikipedia_redirect.sql.bin
39 Combined the 2 files are around 1.5GB and add around 30GB to the install
40 size of nominatim. They also increase the install time by an hour or so.
44 Nominatim can use postcodes from an external source to improve searches that involve a UK postcode. This data can be optionally downloaded:
46 cd $NOMINATIM_SOURCE_DIR/data
47 wget http://www.nominatim.org/data/gb_postcode_data.sql.gz
50 Initial import of the data
51 --------------------------
53 **Important:** first try the import with a small excerpt, for example from
54 [Geofabrik](http://download.geofabrik.de).
56 Download the data to import and load the data with the following command:
58 ./utils/setup.php --osm-file <your data file> --all [--osm2pgsql-cache 28000] 2>&1 | tee setup.log
60 The --osm2pgsql-cache parameter is optional but strongly recommended for
61 planet imports. It sets the node cache size for the osm2pgsql import part
62 (see -C parameter in osm2pgsql help). 28GB are recommended for a full planet
63 import, for excerpts you can use less. Adapt to your available RAM to
64 avoid swapping, never give more than 2/3 of RAM to osm2pgsql.
67 Loading additional datasets
68 ---------------------------
70 The following commands will create additional entries for countries and POI searches:
72 ./utils/specialphrases.php --countries > specialphrases_countries.sql
73 psql -d nominatim -f specialphrases_countries.sql
74 ./utils/specialphrases.php --wiki-import > specialphrases.sql
75 psql -d nominatim -f specialphrases.sql
78 Installing Tiger housenumber data for the US
79 ============================================
81 Nominatim is able to use the official TIGER address set to complement the
82 OSM housenumber data in the US. You can add TIGER data to your own Nominatim
83 instance by following these steps:
85 1. Install the GDAL library and python bindings
87 * Ubuntu: `sudo apt-get install python-gdal`
88 * CentOS: `sudo yum install gdal-python`
90 2. Get the TIGER 2015 data. You will need the EDGES files
91 (3,234 zip files, 11GB total). Choose one of the two sources:
93 wget -r ftp://ftp2.census.gov/geo/tiger/TIGER2015/EDGES/
94 wget -r ftp://mirror1.shellbot.com/census/geo/tiger/TIGER2015/EDGES/
96 The first one is the original source, the second a considerably faster
99 3. Convert the data into SQL statements (stored in data/tiger):
101 ./utils/imports.php --parse-tiger <tiger edge data directory>
103 4. Import the data into your Nominatim database:
105 ./utils/setup.php --import-tiger-data
107 5. Enable use of the Tiger data in your `settings/local.php` by adding:
109 @define('CONST_Use_US_Tiger_Data', true);
111 6. Apply the new settings:
113 ./utils/setup.php --create-functions --enable-diff-updates --create-partition-functions
115 Be warned that the import can take a very long time, especially if you
116 import all of the US. The entire US adds about 10GB to your database.
122 There are many different possibilities to update your Nominatim database.
123 The following section describes how to keep it up-to-date with osmosis.
124 For a list of other methods see the output of `./utils/update.php --help`.
126 Installing the newest version of osmosis
127 ----------------------------------------
129 The version of osmosis that comes with your distribution should be sufficient
132 If you want to install it by hand, get the latest version from the
133 [Osmosis website](http://wiki.openstreetmap.org/wiki/Osmosis). Then
134 tell Nominatim to use this version by adding the following line to
135 your `settings/local.php`:
137 @define('CONST_Osmosis_Binary', '/usr/local/bin/osmosis');
139 Setting up the update process
140 -----------------------------
142 Next the update needs to be initialised. By default Nominatim is configured
143 to update using the global minutely diffs.
145 If you want a different update source you will need to add some settings
146 to `settings/local.php`. For example, to use the daily country extracts
147 diffs for Ireland from geofabrik add the following:
149 // base URL of the replication service
150 @define('CONST_Replication_Url', 'http://download.geofabrik.de/europe/ireland-and-northern-ireland-updates');
151 // Process each update separately, osmosis cannot merge multiple updates
152 @define('CONST_Replication_MaxInterval', '40000');
153 // How often upstream publishes diffs
154 @define('CONST_Replication_Update_Interval', '86400');
155 // How long to sleep if no update found yet
156 @define('CONST_Replication_Recheck_Interval', '900');
159 Delete any existing `settings/configuration.txt`, then run the following command
160 to create the osmosis configuration files:
162 ./utils/setup.php --osmosis-init
164 Enabling hierarchical updates
165 -----------------------------
167 When a place is updated in the database, all places that contain this place
168 in their address need to be updated as well. These hierarchical updates are
169 disabled by default because they slow down the initial import.
170 Enable them with the following command:
172 ./utils/setup.php --create-functions --enable-diff-updates
177 The following command will keep your database constantly up to date:
179 ./utils/update.php --import-osmosis-all --no-npi
181 If you have imported multiple country extracts and want to keep them
182 up-to-date, have a look at the script in
183 (issue #60)[https://github.com/twain47/Nominatim/issues/60].