d1b1acaf1d
Basically leaves the part that needs to be done by the automatic vagrant script in the bash script and moves the remaining part into an OS-independent md file. Also fixes some of the instructions for CentOS. Now almost runs through (some minor issue with permission remains).
3.0 KiB
Importing a new database
The following instructions explain how to create a Nominatim database from an OSM planet file and how to keep the database up to date. It is assumed that you have already sucessfully installed the Nominatim software itself, if not return to the prerequisites page.
Configuration setup in settings/local.php
There are lots of configuration settings you can tweak. Have a look
at settings/settings.php for a full list. Most should have a sensible default.
If you plan to import a large dataset (e.g. Europe, North America, planet),
you should also enable flatnode storage of node locations. With this
setting enabled, node coordinates are stored in a simple file instead
of the database. This will save you import time and disk storage.
Add to your settings/local.php:
@define('CONST_Osm2pgsql_Flatnode_File', '/path/to/flatnode.file');
Downloading additional data
Wikipedia rankings
Wikipedia can be used as an optional auxiliary data source to help indicate the importance of osm features. Nominatim will work without this information but it will improve the quality of the results if this is installed. This data is available as a binary download:
cd $NOMINATIM_SOURCE_DIR/data
wget http://www.nominatim.org/data/wikipedia_article.sql.bin
wget http://www.nominatim.org/data/wikipedia_redirect.sql.bin
Combined the 2 files are around 1.5GB and add around 30GB to the install size of nominatim. They also increase the install time by an hour or so.
UK postcodes
Nominatim can use postcodes from an external source to improve searches that involve a UK postcode. This data can be optionally downloaded:
cd $NOMINATIM_SOURCE_DIR/data
wget http://www.nominatim.org/data/gb_postcode_data.sql.gz
Initial Import of the Data
Important: first try the import with a small excerpt, for example from Geofabrik.
Download the data to import and load the data with the following command:
./utils/setup.php --osm-file <your data file> --all [--osm2pgsql-cache 28000] 2>&1 | tee setup.log
The --osm2pgsql-cache parameter is optional but strongly recommended for planet imports. It sets the node cache size for the osm2pgsql import part (see -C parameter in osm2pgsql help). 28GB are recommended for a full planet imports, for excerpts you can use less. Adapt to your available RAM to avoid swapping.
The import will take as little as an hour for a small country extract and as much as 10 days for a full-scale planet import on less powerful hardware.
Loading Additional Datasets
The following commands will create additional entries for countries and POI searches:
./utils/specialphrases.php --countries > data/specialphrases_countries.sql
psql -d nominatim -f data/specialphrases_countries.sql
./utils/specialphrases.php --wiki-import > data/specialphrases.sql
psql -d nominatim -f data/specialphrases.sql