docs: give recomendations about flatnode file size

[nominatim.git] / docs / Import_and_update.md

diff --git a/docs/Import_and_update.md b/docs/Import_and_update.md
index 2f40312aa0b8e56e2cb1d2d0040f7aead55299af..b367a4307d559e0a44451c323887be1964e57446 100644 (file)
--- a/docs/Import_and_update.md
+++ b/docs/Import_and_update.md
@@ -19,6 +19,8 @@ Add to your settings/local.php:
 
     @define('CONST_Osm2pgsql_Flatnode_File', '/path/to/flatnode.file');
 
+Replace the second part with a suitable path on your system and make sure
+the directory exists. There should be at least 35GB of free space.
 
 Downloading additional data
 ---------------------------
@@ -102,8 +104,16 @@ instance by following these steps:
 
          ./utils/setup.php --import-tiger-data
 
+  5. Enable use of the Tiger data in your `settings/local.php` by adding:
+
+         @define('CONST_Use_US_Tiger_Data', true);
+
+  6. Apply the new settings:
+
+        ./utils/setup.php --create-functions --enable-diff-updates --create-partition-functions
+
 Be warned that the import can take a very long time, especially if you
-import all of the US.
+import all of the US. The entire US adds about 10GB to your database.
 
 
 Updates