]> git.openstreetmap.org Git - nominatim.git/blobdiff - nominatim/api/reverse.py
switch reverse() to new Geometry datatype
[nominatim.git] / nominatim / api / reverse.py
index eadb63fb9886c4ba9dcde427291b031397623423..eda4a7a907e2f7db16a5efc9c075ef9ec4611a72 100644 (file)
@@ -7,29 +7,38 @@
 """
 Implementation of reverse geocoding.
 """
-from typing import Optional, List
+from typing import Optional, List, Callable, Type, Tuple
 
 import sqlalchemy as sa
-from geoalchemy2 import WKTElement
 
 from nominatim.typing import SaColumn, SaSelect, SaFromClause, SaLabel, SaRow
 from nominatim.api.connection import SearchConnection
 import nominatim.api.results as nres
 from nominatim.api.logging import log
-from nominatim.api.types import AnyPoint, DataLayer, LookupDetails, GeometryFormat
+from nominatim.api.types import AnyPoint, DataLayer, ReverseDetails, GeometryFormat, Bbox
+from nominatim.db.sqlalchemy_types import Geometry
 
 # In SQLAlchemy expression which compare with NULL need to be expressed with
 # the equal sign.
 # pylint: disable=singleton-comparison
 
-def _select_from_placex(t: SaFromClause, wkt: Optional[str] = None) -> SaSelect:
+RowFunc = Callable[[Optional[SaRow], Type[nres.ReverseResult]], Optional[nres.ReverseResult]]
+
+WKT_PARAM = sa.bindparam('wkt', type_=Geometry)
+MAX_RANK_PARAM = sa.bindparam('max_rank')
+
+def _select_from_placex(t: SaFromClause, use_wkt: bool = True) -> SaSelect:
     """ Create a select statement with the columns relevant for reverse
         results.
     """
-    if wkt is None:
+    if not use_wkt:
         distance = t.c.distance
+        centroid = t.c.centroid
     else:
-        distance = t.c.geometry.ST_Distance(wkt)
+        distance = t.c.geometry.ST_Distance(WKT_PARAM)
+        centroid = sa.case((t.c.geometry.is_line_like(), t.c.geometry.ST_ClosestPoint(WKT_PARAM)),
+                           else_=t.c.centroid).label('centroid')
+
 
     return sa.select(t.c.place_id, t.c.osm_type, t.c.osm_id, t.c.name,
                      t.c.class_, t.c.type,
@@ -37,7 +46,7 @@ def _select_from_placex(t: SaFromClause, wkt: Optional[str] = None) -> SaSelect:
                      t.c.housenumber, t.c.postcode, t.c.country_code,
                      t.c.importance, t.c.wikipedia,
                      t.c.parent_place_id, t.c.rank_address, t.c.rank_search,
-                     t.c.centroid,
+                     centroid,
                      distance.label('distance'),
                      t.c.geometry.ST_Expand(0).label('bbox'))
 
@@ -49,36 +58,67 @@ def _interpolated_housenumber(table: SaFromClause) -> SaLabel:
                    sa.Integer).label('housenumber')
 
 
+def _interpolated_position(table: SaFromClause) -> SaLabel:
+    fac = sa.cast(table.c.step, sa.Float) / (table.c.endnumber - table.c.startnumber)
+    rounded_pos = sa.func.round(table.c.position / fac) * fac
+    return sa.case(
+             (table.c.endnumber == table.c.startnumber, table.c.linegeo.ST_Centroid()),
+              else_=table.c.linegeo.ST_LineInterpolatePoint(rounded_pos)).label('centroid')
+
+
+def _locate_interpolation(table: SaFromClause) -> SaLabel:
+    """ Given a position, locate the closest point on the line.
+    """
+    return sa.case((table.c.linegeo.is_line_like(),
+                    table.c.linegeo.ST_LineLocatePoint(WKT_PARAM)),
+                   else_=0).label('position')
+
+
 def _is_address_point(table: SaFromClause) -> SaColumn:
     return sa.and_(table.c.rank_address == 30,
                    sa.or_(table.c.housenumber != None,
                           table.c.name.has_key('housename')))
 
+
 def _get_closest(*rows: Optional[SaRow]) -> Optional[SaRow]:
     return min(rows, key=lambda row: 1000 if row is None else row.distance)
 
+
 class ReverseGeocoder:
     """ Class implementing the logic for looking up a place from a
         coordinate.
     """
 
-    def __init__(self, conn: SearchConnection, max_rank: int, layer: DataLayer,
-                 details: LookupDetails) -> None:
+    def __init__(self, conn: SearchConnection, params: ReverseDetails) -> None:
         self.conn = conn
-        self.max_rank = max_rank
-        self.layer = layer
-        self.details = details
+        self.params = params
+
+        self.bind_params = {'max_rank': params.max_rank}
+
+
+    @property
+    def max_rank(self) -> int:
+        """ Return the maximum configured rank.
+        """
+        return self.params.max_rank
+
+
+    def has_geometries(self) -> bool:
+        """ Check if any geometries are requested.
+        """
+        return bool(self.params.geometry_output)
+
 
     def layer_enabled(self, *layer: DataLayer) -> bool:
         """ Return true when any of the given layer types are requested.
         """
-        return any(self.layer & l for l in layer)
+        return any(self.params.layers & l for l in layer)
 
 
     def layer_disabled(self, *layer: DataLayer) -> bool:
         """ Return true when none of the given layer types is requested.
         """
-        return not any(self.layer & l for l in layer)
+        return not any(self.params.layers & l for l in layer)
 
 
     def has_feature_layers(self) -> bool:
@@ -86,23 +126,24 @@ class ReverseGeocoder:
         """
         return self.layer_enabled(DataLayer.RAILWAY, DataLayer.MANMADE, DataLayer.NATURAL)
 
+
     def _add_geometry_columns(self, sql: SaSelect, col: SaColumn) -> SaSelect:
-        if not self.details.geometry_output:
+        if not self.has_geometries():
             return sql
 
         out = []
 
-        if self.details.geometry_simplification > 0.0:
-            col = col.ST_SimplifyPreserveTopology(self.details.geometry_simplification)
+        if self.params.geometry_simplification > 0.0:
+            col = sa.func.ST_SimplifyPreserveTopology(col, self.params.geometry_simplification)
 
-        if self.details.geometry_output & GeometryFormat.GEOJSON:
-            out.append(col.ST_AsGeoJSON().label('geometry_geojson'))
-        if self.details.geometry_output & GeometryFormat.TEXT:
-            out.append(col.ST_AsText().label('geometry_text'))
-        if self.details.geometry_output & GeometryFormat.KML:
-            out.append(col.ST_AsKML().label('geometry_kml'))
-        if self.details.geometry_output & GeometryFormat.SVG:
-            out.append(col.ST_AsSVG().label('geometry_svg'))
+        if self.params.geometry_output & GeometryFormat.GEOJSON:
+            out.append(sa.func.ST_AsGeoJSON(col).label('geometry_geojson'))
+        if self.params.geometry_output & GeometryFormat.TEXT:
+            out.append(sa.func.ST_AsText(col).label('geometry_text'))
+        if self.params.geometry_output & GeometryFormat.KML:
+            out.append(sa.func.ST_AsKML(col).label('geometry_kml'))
+        if self.params.geometry_output & GeometryFormat.SVG:
+            out.append(sa.func.ST_AsSVG(col).label('geometry_svg'))
 
         return sql.add_columns(*out)
 
@@ -124,20 +165,18 @@ class ReverseGeocoder:
         return table.c.class_.in_(tuple(include))
 
 
-    async def _find_closest_street_or_poi(self, wkt: WKTElement,
-                                          distance: float) -> Optional[SaRow]:
+    async def _find_closest_street_or_poi(self, distance: float) -> Optional[SaRow]:
         """ Look up the closest rank 26+ place in the database, which
             is closer than the given distance.
         """
         t = self.conn.t.placex
 
-        sql = _select_from_placex(t, wkt)\
-                .where(t.c.geometry.ST_DWithin(wkt, distance))\
+        sql = _select_from_placex(t)\
+                .where(t.c.geometry.ST_DWithin(WKT_PARAM, distance))\
                 .where(t.c.indexed_status == 0)\
                 .where(t.c.linked_place_id == None)\
-                .where(sa.or_(t.c.geometry.ST_GeometryType()
-                                          .not_in(('ST_Polygon', 'ST_MultiPolygon')),
-                              t.c.centroid.ST_Distance(wkt) < distance))\
+                .where(sa.or_(sa.not_(t.c.geometry.is_area()),
+                              t.c.centroid.ST_Distance(WKT_PARAM) < distance))\
                 .order_by('distance')\
                 .limit(1)
 
@@ -153,24 +192,25 @@ class ReverseGeocoder:
         if self.layer_enabled(DataLayer.POI) and self.max_rank == 30:
             restrict.append(sa.and_(t.c.rank_search == 30,
                                     t.c.class_.not_in(('place', 'building')),
-                                    t.c.geometry.ST_GeometryType() != 'ST_LineString'))
+                                    sa.not_(t.c.geometry.is_line_like())))
         if self.has_feature_layers():
-            restrict.append(sa.and_(t.c.rank_search.between(26, self.max_rank),
+            restrict.append(sa.and_(t.c.rank_search.between(26, MAX_RANK_PARAM),
                                     t.c.rank_address == 0,
                                     self._filter_by_layer(t)))
 
         if not restrict:
             return None
 
-        return (await self.conn.execute(sql.where(sa.or_(*restrict)))).one_or_none()
+        sql = sql.where(sa.or_(*restrict))
+
+        return (await self.conn.execute(sql, self.bind_params)).one_or_none()
 
 
-    async def _find_housenumber_for_street(self, parent_place_id: int,
-                                           wkt: WKTElement) -> Optional[SaRow]:
+    async def _find_housenumber_for_street(self, parent_place_id: int) -> Optional[SaRow]:
         t = self.conn.t.placex
 
-        sql = _select_from_placex(t, wkt)\
-                .where(t.c.geometry.ST_DWithin(wkt, 0.001))\
+        sql = _select_from_placex(t)\
+                .where(t.c.geometry.ST_DWithin(WKT_PARAM, 0.001))\
                 .where(t.c.parent_place_id == parent_place_id)\
                 .where(_is_address_point(t))\
                 .where(t.c.indexed_status == 0)\
@@ -180,76 +220,79 @@ class ReverseGeocoder:
 
         sql = self._add_geometry_columns(sql, t.c.geometry)
 
-        return (await self.conn.execute(sql)).one_or_none()
+        return (await self.conn.execute(sql, self.bind_params)).one_or_none()
 
 
     async def _find_interpolation_for_street(self, parent_place_id: Optional[int],
-                                             wkt: WKTElement,
                                              distance: float) -> Optional[SaRow]:
         t = self.conn.t.osmline
 
         sql = sa.select(t,
-                        t.c.linegeo.ST_Distance(wkt).label('distance'),
-                        t.c.linegeo.ST_LineLocatePoint(wkt).label('position'))\
-                .where(t.c.linegeo.ST_DWithin(wkt, distance))\
+                        t.c.linegeo.ST_Distance(WKT_PARAM).label('distance'),
+                        _locate_interpolation(t))\
+                .where(t.c.linegeo.ST_DWithin(WKT_PARAM, distance))\
+                .where(t.c.startnumber != None)\
                 .order_by('distance')\
                 .limit(1)
 
         if parent_place_id is not None:
             sql = sql.where(t.c.parent_place_id == parent_place_id)
 
-        inner = sql.subquery()
+        inner = sql.subquery('ipol')
 
         sql = sa.select(inner.c.place_id, inner.c.osm_id,
                         inner.c.parent_place_id, inner.c.address,
                         _interpolated_housenumber(inner),
+                        _interpolated_position(inner),
                         inner.c.postcode, inner.c.country_code,
-                        inner.c.linegeo.ST_LineInterpolatePoint(inner.c.position).label('centroid'),
                         inner.c.distance)
 
-        if self.details.geometry_output:
-            sub = sql.subquery()
-            sql = self._add_geometry_columns(sql, sub.c.centroid)
+        if self.has_geometries():
+            sub = sql.subquery('geom')
+            sql = self._add_geometry_columns(sa.select(sub), sub.c.centroid)
 
-        return (await self.conn.execute(sql)).one_or_none()
+        return (await self.conn.execute(sql, self.bind_params)).one_or_none()
 
 
     async def _find_tiger_number_for_street(self, parent_place_id: int,
-                                            wkt: WKTElement) -> Optional[SaRow]:
+                                            parent_type: str,
+                                            parent_id: int) -> Optional[SaRow]:
         t = self.conn.t.tiger
 
         inner = sa.select(t,
-                          t.c.linegeo.ST_Distance(wkt).label('distance'),
-                          sa.func.ST_LineLocatePoint(t.c.linegeo, wkt).label('position'))\
-                  .where(t.c.linegeo.ST_DWithin(wkt, 0.001))\
+                          t.c.linegeo.ST_Distance(WKT_PARAM).label('distance'),
+                          _locate_interpolation(t))\
+                  .where(t.c.linegeo.ST_DWithin(WKT_PARAM, 0.001))\
                   .where(t.c.parent_place_id == parent_place_id)\
                   .order_by('distance')\
                   .limit(1)\
-                  .subquery()
+                  .subquery('tiger')
 
         sql = sa.select(inner.c.place_id,
                         inner.c.parent_place_id,
+                        sa.literal(parent_type).label('osm_type'),
+                        sa.literal(parent_id).label('osm_id'),
                         _interpolated_housenumber(inner),
+                        _interpolated_position(inner),
                         inner.c.postcode,
-                        inner.c.linegeo.ST_LineInterpolatePoint(inner.c.position).label('centroid'),
                         inner.c.distance)
 
-        if self.details.geometry_output:
-            sub = sql.subquery()
-            sql = self._add_geometry_columns(sql, sub.c.centroid)
+        if self.has_geometries():
+            sub = sql.subquery('geom')
+            sql = self._add_geometry_columns(sa.select(sub), sub.c.centroid)
 
-        return (await self.conn.execute(sql)).one_or_none()
+        return (await self.conn.execute(sql, self.bind_params)).one_or_none()
 
 
-    async def lookup_street_poi(self, wkt: WKTElement) -> Optional[nres.ReverseResult]:
+    async def lookup_street_poi(self) -> Tuple[Optional[SaRow], RowFunc]:
         """ Find a street or POI/address for the given WKT point.
         """
         log().section('Reverse lookup on street/address level')
-        result = None
         distance = 0.006
         parent_place_id = None
 
-        row = await self._find_closest_street_or_poi(wkt, distance)
+        row = await self._find_closest_street_or_poi(distance)
+        row_func: RowFunc = nres.create_from_placex_row
         log().var_dump('Result (street/building)', row)
 
         # If the closest result was a street, but an address was requested,
@@ -261,19 +304,23 @@ class ReverseGeocoder:
                 distance = 0.001
                 parent_place_id = row.place_id
                 log().comment('Find housenumber for street')
-                addr_row = await self._find_housenumber_for_street(parent_place_id, wkt)
+                addr_row = await self._find_housenumber_for_street(parent_place_id)
                 log().var_dump('Result (street housenumber)', addr_row)
 
                 if addr_row is not None:
                     row = addr_row
+                    row_func = nres.create_from_placex_row
                     distance = addr_row.distance
                 elif row.country_code == 'us' and parent_place_id is not None:
                     log().comment('Find TIGER housenumber for street')
-                    addr_row = await self._find_tiger_number_for_street(parent_place_id, wkt)
+                    addr_row = await self._find_tiger_number_for_street(parent_place_id,
+                                                                        row.osm_type,
+                                                                        row.osm_id)
                     log().var_dump('Result (street Tiger housenumber)', addr_row)
 
                     if addr_row is not None:
-                        result = nres.create_from_tiger_row(addr_row, nres.ReverseResult)
+                        row = addr_row
+                        row_func = nres.create_from_tiger_row
             else:
                 distance = row.distance
 
@@ -282,15 +329,16 @@ class ReverseGeocoder:
         if self.max_rank > 27 and self.layer_enabled(DataLayer.ADDRESS):
             log().comment('Find interpolation for street')
             addr_row = await self._find_interpolation_for_street(parent_place_id,
-                                                                 wkt, distance)
+                                                                 distance)
             log().var_dump('Result (street interpolation)', addr_row)
             if addr_row is not None:
-                result = nres.create_from_osmline_row(addr_row, nres.ReverseResult)
+                row = addr_row
+                row_func = nres.create_from_osmline_row
 
-        return result or nres.create_from_placex_row(row, nres.ReverseResult)
+        return row, row_func
 
 
-    async def _lookup_area_address(self, wkt: WKTElement) -> Optional[SaRow]:
+    async def _lookup_area_address(self) -> Optional[SaRow]:
         """ Lookup large addressable areas for the given WKT point.
         """
         log().comment('Reverse lookup by larger address area features')
@@ -299,35 +347,35 @@ class ReverseGeocoder:
         # The inner SQL brings results in the right order, so that
         # later only a minimum of results needs to be checked with ST_Contains.
         inner = sa.select(t, sa.literal(0.0).label('distance'))\
-                  .where(t.c.rank_search.between(5, self.max_rank))\
+                  .where(t.c.rank_search.between(5, MAX_RANK_PARAM))\
                   .where(t.c.rank_address.between(5, 25))\
-                  .where(t.c.geometry.ST_GeometryType().in_(('ST_Polygon', 'ST_MultiPolygon')))\
-                  .where(t.c.geometry.intersects(wkt))\
+                  .where(t.c.geometry.is_area())\
+                  .where(t.c.geometry.intersects(WKT_PARAM))\
                   .where(t.c.name != None)\
                   .where(t.c.indexed_status == 0)\
                   .where(t.c.linked_place_id == None)\
                   .where(t.c.type != 'postcode')\
                   .order_by(sa.desc(t.c.rank_search))\
                   .limit(50)\
-                  .subquery()
+                  .subquery('area')
 
-        sql = _select_from_placex(inner)\
-                  .where(inner.c.geometry.ST_Contains(wkt))\
+        sql = _select_from_placex(inner, False)\
+                  .where(inner.c.geometry.ST_Contains(WKT_PARAM))\
                   .order_by(sa.desc(inner.c.rank_search))\
                   .limit(1)
 
         sql = self._add_geometry_columns(sql, inner.c.geometry)
 
-        address_row = (await self.conn.execute(sql)).one_or_none()
+        address_row = (await self.conn.execute(sql, self.bind_params)).one_or_none()
         log().var_dump('Result (area)', address_row)
 
         if address_row is not None and address_row.rank_search < self.max_rank:
             log().comment('Search for better matching place nodes inside the area')
             inner = sa.select(t,
-                              t.c.geometry.ST_Distance(wkt).label('distance'))\
+                              t.c.geometry.ST_Distance(WKT_PARAM).label('distance'))\
                       .where(t.c.osm_type == 'N')\
                       .where(t.c.rank_search > address_row.rank_search)\
-                      .where(t.c.rank_search <= self.max_rank)\
+                      .where(t.c.rank_search <= MAX_RANK_PARAM)\
                       .where(t.c.rank_address.between(5, 25))\
                       .where(t.c.name != None)\
                       .where(t.c.indexed_status == 0)\
@@ -335,13 +383,13 @@ class ReverseGeocoder:
                       .where(t.c.type != 'postcode')\
                       .where(t.c.geometry
                                 .ST_Buffer(sa.func.reverse_place_diameter(t.c.rank_search))
-                                .intersects(wkt))\
+                                .intersects(WKT_PARAM))\
                       .order_by(sa.desc(t.c.rank_search))\
                       .limit(50)\
-                      .subquery()
+                      .subquery('places')
 
             touter = self.conn.t.placex.alias('outer')
-            sql = _select_from_placex(inner)\
+            sql = _select_from_placex(inner, False)\
                   .join(touter, touter.c.geometry.ST_Contains(inner.c.geometry))\
                   .where(touter.c.place_id == address_row.place_id)\
                   .where(inner.c.distance < sa.func.reverse_place_diameter(inner.c.rank_search))\
@@ -350,7 +398,7 @@ class ReverseGeocoder:
 
             sql = self._add_geometry_columns(sql, inner.c.geometry)
 
-            place_address_row = (await self.conn.execute(sql)).one_or_none()
+            place_address_row = (await self.conn.execute(sql, self.bind_params)).one_or_none()
             log().var_dump('Result (place node)', place_address_row)
 
             if place_address_row is not None:
@@ -359,65 +407,64 @@ class ReverseGeocoder:
         return address_row
 
 
-    async def _lookup_area_others(self, wkt: WKTElement) -> Optional[SaRow]:
+    async def _lookup_area_others(self) -> Optional[SaRow]:
         t = self.conn.t.placex
 
-        inner = sa.select(t, t.c.geometry.ST_Distance(wkt).label('distance'))\
+        inner = sa.select(t, t.c.geometry.ST_Distance(WKT_PARAM).label('distance'))\
                   .where(t.c.rank_address == 0)\
-                  .where(t.c.rank_search.between(5, self.max_rank))\
+                  .where(t.c.rank_search.between(5, MAX_RANK_PARAM))\
                   .where(t.c.name != None)\
                   .where(t.c.indexed_status == 0)\
                   .where(t.c.linked_place_id == None)\
                   .where(self._filter_by_layer(t))\
                   .where(t.c.geometry
                                 .ST_Buffer(sa.func.reverse_place_diameter(t.c.rank_search))
-                                .intersects(wkt))\
+                                .intersects(WKT_PARAM))\
                   .order_by(sa.desc(t.c.rank_search))\
                   .limit(50)\
                   .subquery()
 
-        sql = _select_from_placex(inner)\
-                  .where(sa.or_(inner.c.geometry.ST_GeometryType()
-                                                .not_in(('ST_Polygon', 'ST_MultiPolygon')),
-                                inner.c.geometry.ST_Contains(wkt)))\
+        sql = _select_from_placex(inner, False)\
+                  .where(sa.or_(sa.not_(inner.c.geometry.is_area()),
+                                inner.c.geometry.ST_Contains(WKT_PARAM)))\
                   .order_by(sa.desc(inner.c.rank_search), inner.c.distance)\
                   .limit(1)
 
         sql = self._add_geometry_columns(sql, inner.c.geometry)
 
-        row = (await self.conn.execute(sql)).one_or_none()
+        row = (await self.conn.execute(sql, self.bind_params)).one_or_none()
         log().var_dump('Result (non-address feature)', row)
 
         return row
 
 
-    async def lookup_area(self, wkt: WKTElement) -> Optional[nres.ReverseResult]:
-        """ Lookup large areas for the given WKT point.
+    async def lookup_area(self) -> Optional[SaRow]:
+        """ Lookup large areas for the current search.
         """
         log().section('Reverse lookup by larger area features')
 
         if self.layer_enabled(DataLayer.ADDRESS):
-            address_row = await self._lookup_area_address(wkt)
+            address_row = await self._lookup_area_address()
         else:
             address_row = None
 
         if self.has_feature_layers():
-            other_row = await self._lookup_area_others(wkt)
+            other_row = await self._lookup_area_others()
         else:
             other_row = None
 
-        return nres.create_from_placex_row(_get_closest(address_row, other_row), nres.ReverseResult)
+        return _get_closest(address_row, other_row)
 
 
-    async def lookup_country(self, wkt: WKTElement) -> Optional[nres.ReverseResult]:
-        """ Lookup the country for the given WKT point.
+    async def lookup_country(self) -> Optional[SaRow]:
+        """ Lookup the country for the current search.
         """
         log().section('Reverse lookup by country code')
         t = self.conn.t.country_grid
         sql = sa.select(t.c.country_code).distinct()\
-                .where(t.c.geometry.ST_Contains(wkt))
+                .where(t.c.geometry.ST_Contains(WKT_PARAM))
 
-        ccodes = tuple((r[0] for r in await self.conn.execute(sql)))
+        ccodes = tuple((r[0] for r in await self.conn.execute(sql, self.bind_params)))
         log().var_dump('Country codes', ccodes)
 
         if not ccodes:
@@ -428,10 +475,10 @@ class ReverseGeocoder:
             log().comment('Search for place nodes in country')
 
             inner = sa.select(t,
-                              t.c.geometry.ST_Distance(wkt).label('distance'))\
+                              t.c.geometry.ST_Distance(WKT_PARAM).label('distance'))\
                       .where(t.c.osm_type == 'N')\
                       .where(t.c.rank_search > 4)\
-                      .where(t.c.rank_search <= self.max_rank)\
+                      .where(t.c.rank_search <= MAX_RANK_PARAM)\
                       .where(t.c.rank_address.between(5, 25))\
                       .where(t.c.name != None)\
                       .where(t.c.indexed_status == 0)\
@@ -440,59 +487,67 @@ class ReverseGeocoder:
                       .where(t.c.country_code.in_(ccodes))\
                       .where(t.c.geometry
                                 .ST_Buffer(sa.func.reverse_place_diameter(t.c.rank_search))
-                                .intersects(wkt))\
+                                .intersects(WKT_PARAM))\
                       .order_by(sa.desc(t.c.rank_search))\
                       .limit(50)\
                       .subquery()
 
-            sql = _select_from_placex(inner)\
+            sql = _select_from_placex(inner, False)\
                   .where(inner.c.distance < sa.func.reverse_place_diameter(inner.c.rank_search))\
                   .order_by(sa.desc(inner.c.rank_search), inner.c.distance)\
                   .limit(1)
 
             sql = self._add_geometry_columns(sql, inner.c.geometry)
 
-            address_row = (await self.conn.execute(sql)).one_or_none()
+            address_row = (await self.conn.execute(sql, self.bind_params)).one_or_none()
             log().var_dump('Result (addressable place node)', address_row)
         else:
             address_row = None
 
         if address_row is None:
             # Still nothing, then return a country with the appropriate country code.
-            sql = _select_from_placex(t, wkt)\
+            sql = _select_from_placex(t)\
                       .where(t.c.country_code.in_(ccodes))\
                       .where(t.c.rank_address == 4)\
                       .where(t.c.rank_search == 4)\
                       .where(t.c.linked_place_id == None)\
-                      .order_by('distance')
+                      .order_by('distance')\
+                      .limit(1)
 
             sql = self._add_geometry_columns(sql, t.c.geometry)
 
-            address_row = (await self.conn.execute(sql)).one_or_none()
+            address_row = (await self.conn.execute(sql, self.bind_params)).one_or_none()
 
-        return nres.create_from_placex_row(address_row, nres.ReverseResult)
+        return address_row
 
 
     async def lookup(self, coord: AnyPoint) -> Optional[nres.ReverseResult]:
         """ Look up a single coordinate. Returns the place information,
             if a place was found near the coordinates or None otherwise.
         """
-        log().function('reverse_lookup',
-                       coord=coord, max_rank=self.max_rank,
-                       layer=self.layer, details=self.details)
+        log().function('reverse_lookup', coord=coord, params=self.params)
 
 
-        wkt = WKTElement(f'POINT({coord[0]} {coord[1]})', srid=4326)
+        self.bind_params['wkt'] = f'SRID=4326;POINT({coord[0]} {coord[1]})'
 
-        result: Optional[nres.ReverseResult] = None
+        row: Optional[SaRow] = None
+        row_func: RowFunc = nres.create_from_placex_row
 
         if self.max_rank >= 26:
-            result = await self.lookup_street_poi(wkt)
-        if result is None and self.max_rank > 4:
-            result = await self.lookup_area(wkt)
-        if result is None and self.layer_enabled(DataLayer.ADDRESS):
-            result = await self.lookup_country(wkt)
+            row, tmp_row_func = await self.lookup_street_poi()
+            if row is not None:
+                row_func = tmp_row_func
+        if row is None and self.max_rank > 4:
+            row = await self.lookup_area()
+        if row is None and self.layer_enabled(DataLayer.ADDRESS):
+            row = await self.lookup_country()
+
+        result = row_func(row, nres.ReverseResult)
         if result is not None:
-            await nres.add_result_details(self.conn, result, self.details)
+            assert row is not None
+            result.distance = row.distance
+            if hasattr(row, 'bbox'):
+                result.bbox = Bbox.from_wkb(row.bbox)
+            await nres.add_result_details(self.conn, [result], self.params)
 
         return result