directory apart from the Nominatim software and change into the directory:
```
-mkdir ~/nominatim-planet
-cd ~/nominatim-planet
+mkdir ~/nominatim-project
+cd ~/nominatim-project
```
In the following, we refer to the project directory as `$PROJECT_DIR`. To be
able to copy&paste instructions, you can export the appropriate variable:
```
-export PROJECT_DIR=~/nominatim-planet
+export PROJECT_DIR=~/nominatim-project
```
The Nominatim tool assumes per default that the current working directory is
cd $PROJECT_DIR
wget https://nominatim.org/data/wikimedia-importance.sql.gz
+ wget -O secondary_importance.sql.gz https://nominatim.org/data/wikimedia-secondary-importance.sql.gz
-The file is about 400MB and adds around 4GB to the Nominatim database.
+The files are about 400MB and add around 4GB to the Nominatim database. For
+more information about importance,
+see [Importance Customization](../customize/Importance.md).
!!! tip
If you forgot to download the wikipedia rankings, then you can
also add importances after the import. Download the SQL files, then
- run `nominatim refresh --wiki-data --importance`. Updating
- importances for a planet will take a couple of hours.
+ run `nominatim refresh --wiki-data --secondary-importance --importance`.
+ Updating importances for a planet will take a couple of hours.
### External postcodes
[photon](https://photon.komoot.io/) database, then you can set up a database
without search indexes. Add `--reverse-only` to your setup command above.
-This saves about 5% of disk space.
+This saves about 5% of disk space, import time won't be significant faster.
### Filtering Imported Data