From bc84db64605055f5437b9c322c634a84260a2c21 Mon Sep 17 00:00:00 2001 From: Sarah Hoffmann Date: Sat, 4 May 2024 13:13:00 +0200 Subject: [PATCH 1/1] add links to official secondary importance file --- docs/admin/Import.md | 9 ++++++--- docs/customize/Importance.md | 14 ++++++++++---- 2 files changed, 16 insertions(+), 7 deletions(-) diff --git a/docs/admin/Import.md b/docs/admin/Import.md index 5e9d6d7f..38cd0b74 100644 --- a/docs/admin/Import.md +++ b/docs/admin/Import.md @@ -75,14 +75,17 @@ This data is available as a binary download. Put it into your project directory: 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 diff --git a/docs/customize/Importance.md b/docs/customize/Importance.md index 5c271ed8..f192d265 100644 --- a/docs/customize/Importance.md +++ b/docs/customize/Importance.md @@ -12,7 +12,7 @@ customize them. The main value for importance is derived from page ranking values for Wikipedia pages for a place. For places that do not have their own Wikipedia page, a formula is used that derives a static importance from the -places [search rank](../customize/Ranking.md#search-rank). +place's [search rank](../customize/Ranking.md#search-rank). In a second step, a secondary importance value is added which is meant to represent how well-known the general area is where the place is located. It @@ -21,7 +21,13 @@ importance values. nominatim.org has preprocessed importance tables for the [primary Wikipedia rankings](https://nominatim.org/data/wikimedia-importance.sql.gz) -and for a secondary importance based on the number of tile views on openstreetmap.org. +and for [secondary importance](https://nominatim.org/data/wikimedia-secondary-importance.sql.gz) +based on Wikipedia importance of the administrative areas. + +The source code for creating these files is avaible in the Github projects +[osm-search/wikipedia-wikidata](https://github.com/osm-search/wikipedia-wikidata) +and +[osm-search/secondary-importance](https://github.com/osm-search/secondary-importance). ### Customizing secondary importance @@ -41,8 +47,8 @@ table will be ignored. You must furthermore create an index as follows: CREATE INDEX ON secondary_importance USING gist(ST_ConvexHull(gist)) ``` -The following raster2pgsql command will create a table that conforms to -the requirements: +The following raster2pgsql command will create a table from a tiff file +that conforms to the requirements: ``` raster2pgsql -I -C -Y -d -t 128x128 input.tiff public.secondary_importance -- 2.39.5