Minor update to docs

README.md

@@ -202,33 +202,9 @@ running without Docker.
 
 ## Layer Sets
 
-Layer sets are defined under the directory [pgosm-flex/flex-config/](https://github.com/rustprooflabs/pgosm-flex/tree/main/flex-config), the current `run-*` options are:
-
-* `run-all`
-* `run-no-tags`
-* `run-road-place`
-* `run-unitable`
-
-Each of these layer sets includes the core layer defintions
-(see `style/*.lua`)
-and post-processing SQL (see `sql/*.sql`).
-The `.lua` scripts work with osm2pgsql's Flex output.
-PgOSM-Flex is using these styles with a mix-and-match approach.
-This is best illustrated by looking within the main `run-all.lua` script.
-As the following shows, it does not define any actual styles, only includes
-a single style, and runs another layer set (`run-no-tags`).
-
-
-```lua
-require "style.tags"
-require "run-no-tags"
-```
-
-The `style.tags` script creates a table `osm.tags` that contains all OSM key/value
-pairs, but with no geometry.  This is the largest table loaded by the `run-all`
-layer set and enables joining any OSM data in another layer (e.g. `osm.road_line`)
-to find any additional tags.
 
+PgOSM Flex includes a few layersets and makes it easy to customize your own.
+See [docs/LAYERSETS.md](docs/LAYERSETS.md) for details.
 
 
 

docs/LAYERSETS.md

@@ -1,10 +1,28 @@
-## PgOSM Flex layersets
+# PgOSM Flex layersets
 
 A layerset defines one or more layers, where each layer includes
 one or more tables and/or views.
+Layers are defined by a matched pair of Lua and SQL scripts.  For example,
+the road layer is defined by `flex-config/style/road.lua` and
+`flex-config/sql/road.sql`.
+
+
+Layersets are defined in `.ini` files.
+
+
+## Included layersets
+
+A few layersets are included with PgOSM Flex under `flex-config/layerset/`.
+If the `--layerset` is not defined, the `default` layerset is used.
+
+* `minimal`
+* `basic`
+* `default`
+* `everything`
+
+
+## Custom layerset
 
-Layersets are defined in `.ini` files. A few layersets are included with PgOSM Flex under
-`flex-config/layerset/`.
 
 A layerset including the `poi` and `road_major` layers would look
 like:
@@ -17,3 +35,4 @@ road_major=true
 
 Layers not listed in the layerset `.ini` are not included.
 
+