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');
23 Downloading additional data
24 ---------------------------
26 ### Wikipedia rankings
28 Wikipedia can be used as an optional auxiliary data source to help indicate
29 the importance of osm features. Nominatim will work without this information
30 but it will improve the quality of the results if this is installed.
31 This data is available as a binary download:
33 cd $NOMINATIM_SOURCE_DIR/data
34 wget http://www.nominatim.org/data/wikipedia_article.sql.bin
35 wget http://www.nominatim.org/data/wikipedia_redirect.sql.bin
37 Combined the 2 files are around 1.5GB and add around 30GB to the install
38 size of nominatim. They also increase the install time by an hour or so.
42 Nominatim can use postcodes from an external source to improve searches that involve a UK postcode. This data can be optionally downloaded:
44 cd $NOMINATIM_SOURCE_DIR/data
45 wget http://www.nominatim.org/data/gb_postcode_data.sql.gz
48 Initial Import of the Data
49 --------------------------
51 **Important:** first try the import with a small excerpt, for example from Geofabrik.
53 Download the data to import and load the data with the following command:
55 ./utils/setup.php --osm-file <your data file> --all [--osm2pgsql-cache 28000] 2>&1 | tee setup.log
57 The --osm2pgsql-cache parameter is optional but strongly recommended for
58 planet imports. It sets the node cache size for the osm2pgsql import part
59 (see -C parameter in osm2pgsql help). 28GB are recommended for a full planet
60 imports, for excerpts you can use less. Adapt to your available RAM to
61 avoid swapping, never give more than 2/3 of RAM to osm2pgsql.
64 Loading Additional Datasets
65 ---------------------------
67 The following commands will create additional entries for countries and POI searches:
69 ./utils/specialphrases.php --countries > data/specialphrases_countries.sql
70 psql -d nominatim -f data/specialphrases_countries.sql
71 ./utils/specialphrases.php --wiki-import > data/specialphrases.sql
72 psql -d nominatim -f data/specialphrases.sql
75 Installing Tiger housenumber data for the US
76 ============================================
78 Nominatim is able to use the official TIGER address set to complement the
79 OSM housenumber data in the US. You can add TIGER data to your own Nominatim
80 instance by following these steps:
82 1. Install the GDAL library and python bindings
84 Ubuntu: apt-get install python-gdal
85 CentOS: yum install gdal-python
87 2. Get the TIGER 2015 data. You will need the EDGES files
88 (3,234 zip files, 11GB total).
90 wget -r ftp://mirror1.shellbot.com/census/geo/tiger/TIGER2015/EDGES/
91 (1gb/s preferred mirror) MIRROR HOSTED BY SHELLBOT, LTD.
95 wget -r ftp://ftp2.census.gov/geo/tiger/TIGER2015/EDGES/
96 (500kb/s original source) HOSTED BY THE US CENSUS BUREAU
98 3. Convert the data into SQL statements (stored in data/tiger):
100 ./utils/imports.php --parse-tiger <tiger edge data directory>
102 4. Import the data into your Nominatim database:
104 ./utils/setup.php --import-tiger-data
106 Be warned that the import can take a very long time, especially if you
107 import all of the US.
113 There are many different possibilities to update your Nominatim database.
114 The following section describes how to keep it up-to-date with osmosis.
115 For a list of other methods see the output of ./utils/update.php --help.
117 Installing the newest version of osmosis
118 ----------------------------------------
120 The version of osmosis that comes with your distribution should be sufficient
123 If you want to install it by hand, get the latest version from the
124 [Osmosis website](http://wiki.openstreetmap.org/wiki/Osmosis). Then
125 tell Nominatim to use this version by adding the following line to
126 your `settings/local.php`:
128 @define('CONST_Osmosis_Binary', '/usr/local/bin/osmosis');
130 Setting up the update process
131 -----------------------------
133 Next the update needs to be initialised. By default Nominatim is configured
134 to update using the global minutely diffs.
136 If you want a different update source you will need to add some settings
137 to `settings/local.php`. For example, to use the daily country extracts
138 diffs for Ireland from geofabrik add the following:
140 // base URL of the replication service
141 @define('CONST_Replication_Url', 'http://download.geofabrik.de/europe/ireland-and-northern-ireland-updates');
142 // Process each update separately, osmosis cannot merge multiple updates
143 @define('CONST_Replication_MaxInterval', '40000');
144 // How often upstream publishes diffs
145 @define('CONST_Replication_Update_Interval', '86400');
146 // How long to sleep if no update found yet
147 @define('CONST_Replication_Recheck_Interval', '900');
150 Delete existing 'settings/configuration.txt' then run the following command
151 to create the osmosis configuration files:
153 ./utils/setup.php --osmosis-init
155 Enabling hierarchical updates
156 -----------------------------
158 When a place is updated in the database, all places that contain this place
159 in their address need to be updated as well. These hierarchical updates are
160 disabled by default because they slow down the initial import.
161 Enable them with the following command:
163 ./utils/setup.php --create-functions --enable-diff-updates
168 The following command will keep your database constantly up to date:
170 ./utils/update.php --import-osmosis-all --no-npi
172 If you have imported multiple country extracts and want to keep them
173 up-to-date, have a look at the script in
174 (issue #60)[https://github.com/twain47/Nominatim/issues/60].