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 successfully 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 POI searches:
72 ./utils/specialphrases.php --wiki-import > specialphrases.sql
73 psql -d nominatim -f specialphrases.sql
76 Installing Tiger housenumber data for the US
77 ============================================
79 Nominatim is able to use the official TIGER address set to complement the
80 OSM housenumber data in the US. You can add TIGER data to your own Nominatim
81 instance by following these steps:
83 1. Install the GDAL library and python bindings and the unzip tool
85 * Ubuntu: `sudo apt-get install python-gdal unzip`
86 * CentOS: `sudo yum install gdal-python unzip`
88 2. Get the TIGER 2015 data. You will need the EDGES files
89 (3,234 zip files, 11GB total). Choose one of the two sources:
91 wget -r ftp://ftp2.census.gov/geo/tiger/TIGER2015/EDGES/
92 wget -r ftp://mirror1.shellbot.com/census/geo/tiger/TIGER2015/EDGES/
94 The first one is the original source, the second a considerably faster
97 3. Convert the data into SQL statements (stored in data/tiger):
99 ./utils/imports.php --parse-tiger <tiger edge data directory>
101 4. Import the data into your Nominatim database:
103 ./utils/setup.php --import-tiger-data
105 5. Enable use of the Tiger data in your `settings/local.php` by adding:
107 @define('CONST_Use_US_Tiger_Data', true);
109 6. Apply the new settings:
111 ./utils/setup.php --create-functions --enable-diff-updates --create-partition-functions
113 Be warned that the import can take a very long time, especially if you
114 import all of the US. The entire US adds about 10GB to your database.
120 There are many different possibilities to update your Nominatim database.
121 The following section describes how to keep it up-to-date with Pyosmium.
122 For a list of other methods see the output of `./utils/update.php --help`.
124 Installing the newest version of Pyosmium
125 -----------------------------------------
127 It is recommended to install Pyosmium via pip:
129 pip install --user osmium
131 Nominatim needs a tool called `pyosmium-get-updates` that comes with
132 Pyosmium. You need to tell Nominatim where to find it. Add the
133 following line to your `settings/local.php`:
135 @define('CONST_Pyosmium_Binary', '/home/user/.local/bin/pyosmium-get-changes');
137 The path above is fine if you used the `--user` parameter with pip.
138 Replace `user` with your user name.
140 Setting up the update process
141 -----------------------------
143 Next the update needs to be initialised. By default Nominatim is configured
144 to update using the global minutely diffs.
146 If you want a different update source you will need to add some settings
147 to `settings/local.php`. For example, to use the daily country extracts
148 diffs for Ireland from geofabrik add the following:
150 // base URL of the replication service
151 @define('CONST_Replication_Url', 'http://download.geofabrik.de/europe/ireland-and-northern-ireland-updates');
152 // How often upstream publishes diffs
153 @define('CONST_Replication_Update_Interval', '86400');
154 // How long to sleep if no update found yet
155 @define('CONST_Replication_Recheck_Interval', '900');
157 To set up the update process now run the following command:
159 ./utils/update.php --init-updates
161 It outputs the date where updates will start. Recheck that this date is
164 The --init-updates command needs to be rerun whenever the replication service
170 The following command will keep your database constantly up to date:
172 ./utils/update.php --import-osmosis-all
174 If you have imported multiple country extracts and want to keep them
175 up-to-date, have a look at the script in
176 [issue #60](https://github.com/openstreetmap/Nominatim/issues/60).