Update doc for clpc rendering

IlanSmeyatsky · Nov 30, 2020 · eee7974 · eee7974
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commit eee7974
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diff --git a/docs/INSTALL.md b/docs/INSTALL.md
@@ -50,6 +50,11 @@ _Note_: Be careful if you use a Lua script with `osm2pgsql` as it might
 drop nodes with no tags except the `hstore` tags column (typically, a
 `cycleway=asl` node).
 
+**Important**: If you plan on enabling CLPC / bicycle give way signs render
+(see below), make sure to include the `--slim` option in your `osm2pgsql`
+command, to ensure temporary tables are created in database and store the raw
+details about relations (especially table `planet_osm_rels`).
+
 
 ## Shapefiles