| Parameter | Value | Default |
|-----------| ----- | ------- |
-| layers | comma-separated list of: `address`, `poi`, `railway`, `natural`, `manmade` | _unset_ (no restriction) |
+| layer | comma-separated list of: `address`, `poi`, `railway`, `natural`, `manmade` | _unset_ (no restriction) |
-The layers filter allows to select places by themes.
+**`[Python-only]`**
+
+The layer filter allows to select places by themes.
The `address` layer contains all places that make up an address:
address points with house numbers, streets, inhabited places (suburbs, villages,
-cities, states tec.) and administrative boundaries.
+cities, states etc.) and administrative boundaries.
-The `poi` layer selects all point of interest. This includes classic POIs like
-restaurants, shops, hotels but also less obvious features like recycling bins,
-guideposts or benches.
+The `poi` layer selects all point of interest. This includes classic points
+of interest like restaurants, shops, hotels but also less obvious features
+like recycling bins, guideposts or benches.
The `railway` layer includes railway infrastructure like tracks.
Note that in Nominatim's standard configuration, only very few railway
features are imported into the database.
-The `natural` layer collects feautures like rivers, lakes and mountains. While
+The `natural` layer collects features like rivers, lakes and mountains while
the `manmade` layer functions as a catch-all for features not covered by the
other layers.
|-----------| ----- | ------- |
| polygon_threshold | floating-point number | 0.0 |
-When one og the polygon_* outputs is chosen, return a simplified version
+When one of the polygon_* outputs is chosen, return a simplified version
of the output geometry. The parameter describes the
tolerance in degrees with which the geometry may differ from the original
geometry. Topology is preserved in the geometry.