Make sidebar toggle for Regions actually work

api/migrations/versions/a049e5eb24dd_create_table_region.py

@@ -0,0 +1,35 @@
+"""create table region
+
+Revision ID: a049e5eb24dd
+Revises: a9627f63fbed
+Create Date: 2022-04-02 21:28:43.124521
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+from migrations.utils import dbtype
+
+
+# revision identifiers, used by Alembic.
+revision = "a049e5eb24dd"
+down_revision = "a9627f63fbed"
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    op.create_table(
+        "region",
+        sa.Column(
+            "relation_id", sa.BIGINT, autoincrement=True, primary_key=True, index=True
+        ),
+        sa.Column("name", sa.String),
+        sa.Column("geometry", dbtype("GEOMETRY"), index=True),
+        sa.Column("admin_level", sa.Integer, index=True),
+        sa.Column("tags", dbtype("HSTORE")),
+    )
+
+
+def downgrade():
+    op.drop_table("region")

api/obs/api/db.py

@@ -401,9 +401,22 @@ class Comment(Base):
         }
 
 
+class Region(Base):
+    __tablename__ = "region"
+
+    relation_id = Column(BIGINT, primary_key=True, index=True)
+    name = Column(String)
+    geometry = Column(Geometry)
+    admin_level = Column(Integer)
+    tags = Column(HSTORE)
+
+
 Comment.author = relationship("User", back_populates="authored_comments")
 User.authored_comments = relationship(
-    "Comment", order_by=Comment.created_at, back_populates="author", passive_deletes=True
+    "Comment",
+    order_by=Comment.created_at,
+    back_populates="author",
+    passive_deletes=True,
 )
 
 Track.author = relationship("User", back_populates="authored_tracks")
@@ -418,7 +431,10 @@ Track.comments = relationship(
 
 OvertakingEvent.track = relationship("Track", back_populates="overtaking_events")
 Track.overtaking_events = relationship(
-    "OvertakingEvent", order_by=OvertakingEvent.time, back_populates="track", passive_deletes=True
+    "OvertakingEvent",
+    order_by=OvertakingEvent.time,
+    back_populates="track",
+    passive_deletes=True,
 )
 
 

api/obs/api/routes/frontend.py

@@ -26,7 +26,7 @@ if app.config.FRONTEND_CONFIG:
                         .replace("111", "{x}")
                         .replace("222", "{y}")
                     ],
-                    "minzoom": 12,
+                    "minzoom": 0,
                     "maxzoom": 14,
                 }
             ),

api/obs/api/routes/stats.py

@@ -4,12 +4,12 @@ from typing import Optional
 from operator import and_
 from functools import reduce
 
-from sqlalchemy import select, func
+from sqlalchemy import select, func, desc
 
 from sanic.response import json
 
 from obs.api.app import api
-from obs.api.db import Track, OvertakingEvent, User
+from obs.api.db import Track, OvertakingEvent, User, Region
 from obs.api.utils import round_to
 
 
@@ -167,3 +167,36 @@ async def stats(req):
 #     });
 #   }),
 # );
+
+
+@api.route("/stats/regions")
+async def stats(req):
+    query = (
+        select(
+            [
+                Region.relation_id.label("id"),
+                Region.name,
+                func.count(OvertakingEvent.id).label("overtaking_event_count"),
+            ]
+        )
+        .select_from(Region)
+        .join(
+            OvertakingEvent,
+            func.ST_Within(
+                func.ST_Transform(OvertakingEvent.geometry, 3857), Region.geometry
+            ),
+        )
+        .where(Region.admin_level == 6)
+        .group_by(
+            Region.relation_id,
+            Region.name,
+            Region.relation_id,
+            Region.admin_level,
+            Region.geometry,
+        )
+        .having(func.count(OvertakingEvent.id) > 0)
+        .order_by(desc("overtaking_event_count"))
+    )
+
+    regions = list(map(dict, (await req.ctx.db.execute(query)).all()))
+    return json(regions)

frontend/config.example.json

@@ -12,7 +12,7 @@
   "obsMapSource": {
     "type": "vector",
     "tiles": ["https://portal.example.com/tiles/{z}/{x}/{y}.pbf"],
-    "minzoom": 12,
+    "minzoom": 0,
     "maxzoom": 14
   }
 }

frontend/src/components/ColorMapLegend.tsx

@@ -59,7 +59,7 @@ export function DiscreteColorMapLegend({map}: {map: ColorMap}) {
   )
 }
 
-export default function ColorMapLegend({map, twoTicks = false}: {map: ColorMap, twoTicks?: boolean}) {
+export default function ColorMapLegend({map, twoTicks = false, digits=2}: {map: ColorMap, twoTicks?: boolean, digits?: number}) {
   const min = map[0][0]
   const max = map[map.length - 1][0]
   const normalizeValue = (v) => (v - min) / (max - min)
@@ -81,7 +81,7 @@ export default function ColorMapLegend({map, twoTicks = false}: {map: ColorMap,
       </svg>
       {tickValues.map(([value]) => (
         <span className={styles.tick} key={value} style={{left: normalizeValue(value) * 100 + '%'}}>
-          {value.toFixed(2)}
+          {value.toFixed(digits)}
         </span>
       ))}
     </div>

frontend/src/components/Map/index.tsx

@@ -56,17 +56,23 @@ function Map({
   children,
   boundsFromJson,
   baseMapStyle,
+  onViewportChange,
   ...props
 }: {
   viewportFromUrl?: boolean
   children: React.ReactNode
   boundsFromJson: GeoJSON.Geometry
   baseMapStyle: string
+  onViewportChange: (viewport: Viewport) => void,
 }) {
   const [viewportState, setViewportState] = useState(EMPTY_VIEWPORT)
   const [viewportUrl, setViewportUrl] = useViewportFromUrl()
 
-  const [viewport, setViewport] = viewportFromUrl ? [viewportUrl, setViewportUrl] : [viewportState, setViewportState]
+  const [viewport, setViewport_] = viewportFromUrl ? [viewportUrl, setViewportUrl] : [viewportState, setViewportState]
+  const setViewport = useCallback((viewport: Viewport) => {
+    setViewport_(viewport);
+    onViewportChange?.(viewport);
+  }, [setViewport_, onViewportChange])
 
   const config = useConfig()
   useEffect(() => {

frontend/src/components/RegionStats/index.tsx

@@ -0,0 +1,83 @@
+import React, { useState, useCallback } from "react";
+import { pickBy } from "lodash";
+import {
+  Loader,
+  Statistic,
+  Pagination,
+  Segment,
+  Header,
+  Menu,
+  Table,
+  Icon,
+} from "semantic-ui-react";
+import { useObservable } from "rxjs-hooks";
+import { of, from, concat, combineLatest } from "rxjs";
+import { map, switchMap, distinctUntilChanged } from "rxjs/operators";
+import { Duration, DateTime } from "luxon";
+
+import api from "api";
+
+function formatDuration(seconds) {
+  return (
+    Duration.fromMillis((seconds ?? 0) * 1000)
+      .as("hours")
+      .toFixed(1) + " h"
+  );
+}
+
+export default function Stats() {
+  const [page, setPage] = useState(1);
+  const PER_PAGE = 10;
+  const stats = useObservable(
+    () =>
+      of(null).pipe(
+        switchMap(() => concat(of(null), from(api.get("/stats/regions"))))
+      ),
+    null
+  );
+
+  const pageCount = stats ? Math.ceil(stats.length / PER_PAGE) : 1;
+
+  return (
+    <>
+      <Header as="h2">Top Regions</Header>
+
+      <div>
+        <Loader active={stats == null} />
+
+        <Table celled>
+          <Table.Header>
+            <Table.Row>
+              <Table.HeaderCell>Region name</Table.HeaderCell>
+              <Table.HeaderCell>Event count</Table.HeaderCell>
+            </Table.Row>
+          </Table.Header>
+
+          <Table.Body>
+            {stats
+              ?.slice((page - 1) * PER_PAGE, page * PER_PAGE)
+              ?.map((area) => (
+                <Table.Row key={area.id}>
+                  <Table.Cell>{area.name}</Table.Cell>
+                  <Table.Cell>{area.overtaking_event_count}</Table.Cell>
+                </Table.Row>
+              ))}
+          </Table.Body>
+
+    {pageCount > 1 && <Table.Footer>
+            <Table.Row>
+              <Table.HeaderCell colSpan="2">
+                <Pagination
+                  floated="right"
+                  activePage={page}
+                  totalPages={pageCount}
+                  onPageChange={(e, data) => setPage(data.activePage as number)}
+                />
+              </Table.HeaderCell>
+            </Table.Row>
+          </Table.Footer>}
+        </Table>
+      </div>
+    </>
+  );
+}

frontend/src/components/index.js

@@ -1,4 +1,5 @@
 export {default as Avatar} from './Avatar'
+export {default as Chart} from './Chart'
 export {default as ColorMapLegend, DiscreteColorMapLegend} from './ColorMapLegend'
 export {default as FileDrop} from './FileDrop'
 export {default as FileUploadField} from './FileUploadField'
@@ -6,6 +7,6 @@ export {default as FormattedDate} from './FormattedDate'
 export {default as LoginButton} from './LoginButton'
 export {default as Map} from './Map'
 export {default as Page} from './Page'
+export {default as RegionStats} from './RegionStats'
 export {default as Stats} from './Stats'
 export {default as StripMarkdown} from './StripMarkdown'
-export {default as Chart} from './Chart'

frontend/src/mapstyles/index.js

@@ -77,6 +77,60 @@ export const trackLayer = {
   },
 }
 
+export const getRegionLayers = (adminLevel = 6, baseColor = "#00897B", maxValue = 5000) => [{
+  id: 'region',
+  "type": "fill",
+  "source": "obs",
+  "source-layer": "obs_regions",
+  "minzoom": 0,
+  "maxzoom": 10,
+  "filter": [
+    "all",
+    ["==", "admin_level", adminLevel],
+    [">", "overtaking_event_count", 0],
+  ],
+  "paint": {
+    "fill-color": baseColor,
+    "fill-antialias": true,
+    "fill-opacity": [
+      "interpolate",
+      ["linear"],
+      [
+        "log10",
+        [
+          "get",
+          "overtaking_event_count"
+        ]
+      ],
+      0,
+      0,
+      Math.log10(maxValue),
+      0.9
+    ]
+  },
+},
+{
+  id: 'region-border',
+  "type": "line",
+  "source": "obs",
+  "source-layer": "obs_regions",
+  "minzoom": 0,
+  "maxzoom": 10,
+  "filter": [
+    "all",
+    ["==", "admin_level", adminLevel],
+    [">", "overtaking_event_count", 0],
+  ],
+  "paint": {
+    "line-width": 1,
+    "line-color": baseColor,
+  },
+  "layout": {
+    "line-join": "round",
+    "line-cap": "round"
+  }
+}]
+
 export const trackLayerRaw = produce(trackLayer, draft => {
   // draft.paint['line-color'] = '#81D4FA'
   draft.paint['line-width'][4] = 1

frontend/src/pages/HomePage.tsx

@@ -1,42 +1,44 @@
-import React from 'react'
-import {Link} from 'react-router-dom'
-import {Message, Grid, Loader, Header, Item} from 'semantic-ui-react'
-import {useObservable} from 'rxjs-hooks'
-import {of, from} from 'rxjs'
-import {map, switchMap} from 'rxjs/operators'
+import React from "react";
+import { Link } from "react-router-dom";
+import { Message, Grid, Loader, Header, Item } from "semantic-ui-react";
+import { useObservable } from "rxjs-hooks";
+import { of, from } from "rxjs";
+import { map, switchMap } from "rxjs/operators";
 
-import api from 'api'
-import {Stats, Page, Map} from 'components'
+import api from "api";
+import { RegionStats, Stats, Page, Map } from "components";
 
-import {TrackListItem} from './TracksPage'
-import styles from './HomePage.module.less'
+import { TrackListItem } from "./TracksPage";
+import styles from "./HomePage.module.less";
 
 function MostRecentTrack() {
-  const track: Track | null = useObservable(
+  const tracks: Track[] | null = useObservable(
     () =>
       of(null).pipe(
-        switchMap(() => from(api.fetch('/tracks?limit=1'))),
-        map((response) => response?.tracks?.[0])
+        switchMap(() => from(api.fetch("/tracks?limit=3"))),
+        map((response) => response?.tracks)
       ),
     null,
     []
-  )
+  );
 
   return (
     <>
-      <Header as="h2">Most recent track</Header>
-      <Loader active={track === null} />
-      {track === undefined ? (
+      <Header as="h2">Most recent tracks</Header>
+      <Loader active={tracks === null} />
+      {tracks?.length === 0 ? (
         <Message>
           No public tracks yet. <Link to="/upload">Upload the first!</Link>
         </Message>
-      ) : track ? (
+      ) : tracks ? (
         <Item.Group>
-          <TrackListItem track={track} />
+          {tracks.map((track) => (
+            <TrackListItem key={track.id} track={track} />
+          ))}
         </Item.Group>
       ) : null}
     </>
-  )
+  );
 }
 
 export default function HomePage() {
@@ -46,12 +48,13 @@ export default function HomePage() {
         <Grid.Row>
           <Grid.Column width={8}>
             <Stats />
+            <MostRecentTrack />
           </Grid.Column>
           <Grid.Column width={8}>
-            <MostRecentTrack />
+            <RegionStats />
           </Grid.Column>
         </Grid.Row>
       </Grid>
     </Page>
-  )
+  );
 }

frontend/src/pages/MapPage/LayerSidebar.tsx

@@ -36,6 +36,7 @@ function LayerSidebar({
     baseMap: {style},
     obsRoads: {show: showRoads, showUntagged, attribute, maxCount},
     obsEvents: {show: showEvents},
+    obsRegions: {show: showRegions},
   } = mapConfig
 
   return (
@@ -50,6 +51,28 @@ function LayerSidebar({
           />
         </List.Item>
         <Divider />
+        <List.Item>
+          <Checkbox
+            toggle
+            size="small"
+            id="obsRegions.show"
+            style={{float: 'right'}}
+            checked={showRegions}
+            onChange={() => setMapConfigFlag('obsRegions.show', !showRegions)}
+          />
+          <label htmlFor="obsRegions.show">
+            <Header as="h4">Regions</Header>
+          </label>
+        </List.Item>
+        {showRegions && (
+          <>
+            <List.Item>Color regions based on event count</List.Item>
+            <List.Item>
+              <ColorMapLegend twoTicks map={[[0, "#00897B00"], [5000, "#00897BFF"]]} digits={0} />
+            </List.Item>
+          </>
+        )}
+        <Divider />
         <List.Item>
           <Checkbox
             toggle

frontend/src/pages/MapPage/RegionInfo.tsx

@@ -0,0 +1,33 @@
+import React, { useState, useCallback } from "react";
+import { createPortal } from "react-dom";
+import _ from "lodash";
+import { List, Header, Icon, Button } from "semantic-ui-react";
+
+import styles from "./styles.module.less";
+
+export default function RegionInfo({ region, mapInfoPortal, onClose }) {
+  const content = (
+    <>
+      <div className={styles.closeHeader}>
+        <Header as="h3">{region.properties.name || "Unnamed region"}</Header>
+        <Button primary icon onClick={onClose}>
+          <Icon name="close" />
+        </Button>
+      </div>
+
+      <List>
+        <List.Item>
+          <List.Header>Number of events</List.Header>
+          <List.Content>{region.properties.overtaking_event_count ?? 0}</List.Content>
+        </List.Item>
+      </List>
+    </>
+  );
+
+  return content && mapInfoPortal
+    ? createPortal(
+        <div className={styles.mapInfoBox}>{content}</div>,
+        mapInfoPortal
+      )
+    : null;
+}

frontend/src/pages/MapPage/RoadInfo.tsx

@@ -1,6 +1,7 @@
 import React, {useState, useCallback} from 'react'
+import {createPortal} from 'react-dom'
 import _ from 'lodash'
-import {Segment, Menu, Header, Label, Icon, Table} from 'semantic-ui-react'
+import {Menu, Header, Label, Icon, Table, Button} from 'semantic-ui-react'
 import {Layer, Source} from 'react-map-gl'
 import {of, from, concat} from 'rxjs'
 import {useObservable} from 'rxjs-hooks'
@@ -110,7 +111,7 @@ function HistogramChart({bins, counts}) {
   )
 }
 
-export default function RoadInfo({clickLocation}) {
+export default function RoadInfo({roadInfo: info, mapInfoPortal, onClose}) {
   const [direction, setDirection] = useState('forwards')
 
   const onClickDirection = useCallback(
@@ -122,72 +123,42 @@ export default function RoadInfo({clickLocation}) {
     [setDirection]
   )
 
-  const info = useObservable(
-    (_$, inputs$) =>
-      inputs$.pipe(
-        distinctUntilChanged(_.isEqual),
-        switchMap(([location]) =>
-          location
-            ? concat(
-                of(null),
-                from(
-                  api.get('/mapdetails/road', {
-                    query: {
-                      ...location,
-                      radius: 100,
-                    },
-                  })
-                )
-              )
-            : of(null)
-        )
-      ),
-    null,
-    [clickLocation]
-  )
+  const offsetDirection = info.road.oneway ? 0 : direction === 'forwards' ? 1 : -1 // TODO: change based on left-hand/right-hand traffic
 
-  if (!clickLocation) {
-    return null
-  }
-
-  const loading = info == null
-
-  const offsetDirection = info?.road?.oneway ? 0 : direction === 'forwards' ? 1 : -1 // TODO: change based on left-hand/right-hand traffic
-
-  const content =
-    !loading && !info.road ? (
-      'No road found.'
-    ) : (
+  const content = (
       <>
-        <Header as="h3">{loading ? '...' : info?.road.name || 'Unnamed way'}</Header>
+    <div className={styles.closeHeader}>
+        <Header as="h3">{info.road.name || 'Unnamed way'}</Header>
+        <Button primary icon onClick={onClose}><Icon name='close' /></Button>
+      </div>
 
-        {info?.road.zone && (
-          <Label size="small" color={ZONE_COLORS[info?.road.zone]}>
-            {info?.road.zone}
+        {info.road.zone && (
+          <Label size="small" color={ZONE_COLORS[info.road.zone]}>
+            {info.road.zone}
           </Label>
         )}
 
-        {info?.road.oneway && (
+        {info.road.oneway && (
           <Label size="small" color="blue">
             <Icon name="long arrow alternate right" fitted /> oneway
           </Label>
         )}
 
-        {info?.road.oneway ? null : (
-          <Menu size="tiny" fluid secondary>
+        {info.road.oneway ? null : (
+          <Menu size="tiny" pointing>
             <Menu.Item header>Direction</Menu.Item>
             <Menu.Item name="forwards" active={direction === 'forwards'} onClick={onClickDirection}>
-              {getCardinalDirection(info?.forwards?.bearing)}
+              {getCardinalDirection(info.forwards?.bearing)}
             </Menu.Item>
             <Menu.Item name="backwards" active={direction === 'backwards'} onClick={onClickDirection}>
-              {getCardinalDirection(info?.backwards?.bearing)}
+              {getCardinalDirection(info.backwards?.bearing)}
             </Menu.Item>
           </Menu>
         )}
 
-        {info?.[direction] && <RoadStatsTable data={info[direction]} />}
+        {info[direction] && <RoadStatsTable data={info[direction]} />}
 
-        {info?.[direction]?.distanceOvertaker?.histogram && (
+        {info[direction]?.distanceOvertaker?.histogram && (
           <>
             <Header as="h5">Overtaker distance distribution</Header>
             <HistogramChart {...info[direction]?.distanceOvertaker?.histogram} />
@@ -198,7 +169,7 @@ export default function RoadInfo({clickLocation}) {
 
   return (
     <>
-      {info?.road && (
+      {info.road && (
         <Source id="highlight" type="geojson" data={info.road.geometry}>
           <Layer
             id="route"
@@ -223,10 +194,11 @@ export default function RoadInfo({clickLocation}) {
         </Source>
       )}
 
-      {content && (
+      {content && mapInfoPortal && (
+        createPortal(
         <div className={styles.mapInfoBox}>
-          <Segment loading={loading}>{content}</Segment>
-        </div>
+          {content}
+        </div>, mapInfoPortal))}
       )}
     </>
   )

frontend/src/pages/MapPage/index.tsx

@@ -1,166 +1,257 @@
-import React, {useState, useCallback, useMemo} from 'react'
-import _ from 'lodash'
-import {Button} from 'semantic-ui-react'
-import {Layer, Source} from 'react-map-gl'
-import produce from 'immer'
+import React, { useState, useCallback, useMemo, useRef } from "react";
+import _ from "lodash";
+import { Button } from "semantic-ui-react";
+import { Layer, Source } from "react-map-gl";
+import produce from "immer";
 
-import {Page, Map} from 'components'
-import {useConfig} from 'config'
-import {colorByDistance, colorByCount, reds} from 'mapstyles'
-import {useMapConfig} from 'reducers/mapConfig'
+import api from "api";
+import { Page, Map } from "components";
+import { useConfig } from "config";
+import { colorByDistance, colorByCount, getRegionLayers } from "mapstyles";
+import { useMapConfig } from "reducers/mapConfig";
 
-import RoadInfo from './RoadInfo'
-import LayerSidebar from './LayerSidebar'
-import styles from './styles.module.less'
+import RoadInfo from "./RoadInfo";
+import RegionInfo from "./RegionInfo";
+import LayerSidebar from "./LayerSidebar";
+import styles from "./styles.module.less";
 
 const untaggedRoadsLayer = {
-  id: 'obs_roads_untagged',
-  type: 'line',
-  source: 'obs',
-  'source-layer': 'obs_roads',
-  filter: ['!', ['to-boolean', ['get', 'distance_overtaker_mean']]],
+  id: "obs_roads_untagged",
+  type: "line",
+  source: "obs",
+  "source-layer": "obs_roads",
+  minzoom: 12,
+  filter: ["!", ["to-boolean", ["get", "distance_overtaker_mean"]]],
   layout: {
-    'line-cap': 'round',
-    'line-join': 'round',
+    "line-cap": "round",
+    "line-join": "round",
   },
   paint: {
-    'line-width': ['interpolate', ['exponential', 1.5], ['zoom'], 12, 2, 17, 2],
-    'line-color': '#ABC',
-    'line-opacity': ['interpolate', ['linear'], ['zoom'], 14, 0, 15, 1],
-    'line-offset': [
-      'interpolate',
-      ['exponential', 1.5],
-      ['zoom'],
+    "line-width": ["interpolate", ["exponential", 1.5], ["zoom"], 12, 2, 17, 2],
+    "line-color": "#ABC",
+    // 'line-opacity': ['interpolate', ['linear'], ['zoom'], 14, 0, 15, 1],
+    "line-offset": [
+      "interpolate",
+      ["exponential", 1.5],
+      ["zoom"],
       12,
-      ['get', 'offset_direction'],
+      ["get", "offset_direction"],
       19,
-      ['*', ['get', 'offset_direction'], 8],
+      ["*", ["get", "offset_direction"], 8],
     ],
   },
   minzoom: 12,
-}
+};
 
 const getRoadsLayer = (colorAttribute, maxCount) =>
   produce(untaggedRoadsLayer, (draft) => {
-    draft.id = 'obs_roads_normal'
-    if (colorAttribute.endsWith('_count')) {
+    draft.id = "obs_roads_normal";
+    if (colorAttribute.endsWith("_count")) {
       // delete draft.filter
-      draft.filter = ['to-boolean', ['get', colorAttribute]]
+      draft.filter = ["to-boolean", ["get", colorAttribute]];
     } else {
-      draft.filter = draft.filter[1] // remove '!'
+      draft.filter = draft.filter[1]; // remove '!'
     }
-    draft.paint['line-width'][6] = 6 // scale bigger on zoom
-    draft.paint['line-color'] = colorAttribute.startsWith('distance_')
+    draft.minzoom = 10;
+    draft.paint["line-width"][6] = 6; // scale bigger on zoom
+    draft.paint["line-color"] = colorAttribute.startsWith("distance_")
       ? colorByDistance(colorAttribute)
-      : colorAttribute.endsWith('_count')
+      : colorAttribute.endsWith("_count")
       ? colorByCount(colorAttribute, maxCount)
-      : '#DDD'
-    draft.paint['line-opacity'][3] = 12
-    draft.paint['line-opacity'][5] = 13
-  })
+      : "#DDD";
+    // draft.paint['line-opacity'][3] = 12
+    // draft.paint['line-opacity'][5] = 13
+  });
 
 const getEventsLayer = () => ({
-  id: 'obs_events',
-  type: 'circle',
-  source: 'obs',
-  'source-layer': 'obs_events',
+  id: "obs_events",
+  type: "circle",
+  source: "obs",
+  "source-layer": "obs_events",
   paint: {
-    'circle-radius': ['interpolate', ['linear'], ['zoom'], 14, 3, 17, 8],
-    'circle-color': colorByDistance('distance_overtaker'),
+    "circle-radius": ["interpolate", ["linear"], ["zoom"], 14, 3, 17, 8],
+    "circle-color": colorByDistance("distance_overtaker"),
   },
   minzoom: 11,
-})
+});
 
 const getEventsTextLayer = () => ({
-  id: 'obs_events_text',
-  type: 'symbol',
+  id: "obs_events_text",
+  type: "symbol",
   minzoom: 18,
-  source: 'obs',
-  'source-layer': 'obs_events',
+  source: "obs",
+  "source-layer": "obs_events",
   layout: {
-    'text-field': [
-      'number-format',
-      ['get', 'distance_overtaker'],
-      {'min-fraction-digits': 2, 'max-fraction-digits': 2},
+    "text-field": [
+      "number-format",
+      ["get", "distance_overtaker"],
+      { "min-fraction-digits": 2, "max-fraction-digits": 2 },
     ],
-    'text-allow-overlap': true,
-    'text-font': ['Open Sans Bold', 'Arial Unicode MS Regular'],
-    'text-size': 14,
-    'text-keep-upright': false,
-    'text-anchor': 'left',
-    'text-radial-offset': 1,
-    'text-rotate': ['-', 90, ['*', ['get', 'course'], 180 / Math.PI]],
-    'text-rotation-alignment': 'map',
+    "text-allow-overlap": true,
+    "text-font": ["Open Sans Bold", "Arial Unicode MS Regular"],
+    "text-size": 14,
+    "text-keep-upright": false,
+    "text-anchor": "left",
+    "text-radial-offset": 1,
+    "text-rotate": ["-", 90, ["*", ["get", "course"], 180 / Math.PI]],
+    "text-rotation-alignment": "map",
   },
   paint: {
-    'text-halo-color': 'rgba(255, 255, 255, 1)',
-    'text-halo-width': 1,
-    'text-opacity': ['interpolate', ['linear'], ['zoom'], 15, 0, 15.3, 1],
+    "text-halo-color": "rgba(255, 255, 255, 1)",
+    "text-halo-width": 1,
+    "text-opacity": ["interpolate", ["linear"], ["zoom"], 15, 0, 15.3, 1],
   },
-})
+});
+
+interface RegionInfo {
+  properties: {
+    admin_level: number;
+    name: string;
+    overtaking_event_count: number;
+  };
+}
+interface ArrayStats {
+  statistics: {
+    count: number;
+    mean: number;
+    min: number;
+    max: number;
+    median: number;
+  };
+  histogram: {
+    bins: number[];
+    counts: number[];
+  };
+  values: number[];
+}
+interface RoadDirectionInfo {
+  bearing: number;
+  distanceOvertaker: ArrayStats;
+  distanceStationary: ArrayStats;
+  speed: ArrayStats;
+}
+
+interface RoadInfo {
+  road: {
+    way_id: number;
+    zone: "urban" | "rural" | null;
+    name: string;
+    directionality: -1 | 0 | 1;
+    oneway: boolean;
+    geometry: Object;
+  };
+  forwards: RoadDirectionInfo;
+  backwards: RoadDirectionInfo;
+}
+type Details =
+  | { type: "road"; road: Object }
+  | { type: "region"; region: RegionInfo };
 
 export default function MapPage() {
-  const {obsMapSource} = useConfig() || {}
-  const [clickLocation, setClickLocation] = useState<{longitude: number; latitude: number} | null>(null)
+  const { obsMapSource } = useConfig() || {};
+  const [details, setDetails] = useState<null | Details>(null);
 
-  const mapConfig = useMapConfig()
+  const onCloseDetails = useCallback(() => setDetails(null), [setDetails]);
+
+  const mapConfig = useMapConfig();
+
+  const viewportRef = useRef();
+  const mapInfoPortal = useRef();
+
+  const onViewportChange = useCallback(
+    (viewport) => {
+      viewportRef.current = viewport;
+    },
+    [viewportRef]
+  );
 
   const onClick = useCallback(
-    (e) => {
-      let node = e.target
+    async (e) => {
+      // check if we clicked inside the mapInfoBox, if so, early exit
+      let node = e.target;
       while (node) {
         if (node?.classList?.contains(styles.mapInfoBox)) {
-          return
+          return;
         }
-        node = node.parentNode
+        node = node.parentNode;
       }
 
-      setClickLocation({longitude: e.lngLat[0], latitude: e.lngLat[1]})
-    },
-    [setClickLocation]
-  )
+      const { zoom } = viewportRef.current;
 
-  const [layerSidebar, setLayerSidebar] = useState(true)
+      if (zoom < 10) {
+        const clickedRegion = e.features?.find(
+          (f) => f.source === "obs" && f.sourceLayer === "obs_regions"
+        );
+        setDetails(
+          clickedRegion ? { type: "region", region: clickedRegion } : null
+        );
+      } else {
+        const road = await api.get("/mapdetails/road", {
+          query: {
+            longitude: e.lngLat[0],
+            latitude: e.lngLat[1],
+            radius: 100,
+          },
+        });
+        setDetails(road?.road ? { type: "road", road } : null);
+      }
+    },
+    [setDetails]
+  );
+
+  const [layerSidebar, setLayerSidebar] = useState(true);
 
   const {
-    obsRoads: {attribute, maxCount},
-  } = mapConfig
+    obsRoads: { attribute, maxCount },
+  } = mapConfig;
 
-  const layers = []
+  const layers = [];
 
   if (mapConfig.obsRoads.show && mapConfig.obsRoads.showUntagged) {
-    layers.push(untaggedRoadsLayer)
+    layers.push(untaggedRoadsLayer);
   }
 
-  const roadsLayer = useMemo(() => getRoadsLayer(attribute, maxCount), [attribute, maxCount])
+  const roadsLayer = useMemo(
+    () => getRoadsLayer(attribute, maxCount),
+    [attribute, maxCount]
+  );
   if (mapConfig.obsRoads.show) {
-    layers.push(roadsLayer)
+    layers.push(roadsLayer);
   }
 
-  const eventsLayer = useMemo(() => getEventsLayer(), [])
-  const eventsTextLayer = useMemo(() => getEventsTextLayer(), [])
+  const regionLayers = useMemo(() => getRegionLayers(), []);
+  if (mapConfig.obsRegions.show) {
+    layers.push(...regionLayers);
+  }
+
+  const eventsLayer = useMemo(() => getEventsLayer(), []);
+  const eventsTextLayer = useMemo(() => getEventsTextLayer(), []);
   if (mapConfig.obsEvents.show) {
-    layers.push(eventsLayer)
-    layers.push(eventsTextLayer)
+    layers.push(eventsLayer);
+    layers.push(eventsTextLayer);
   }
 
   if (!obsMapSource) {
-    return null
+    return null;
   }
 
   return (
     <Page fullScreen title="Map">
-      <div className={styles.mapContainer}>
+      <div className={styles.mapContainer} ref={mapInfoPortal}>
         {layerSidebar && (
           <div className={styles.mapSidebar}>
             <LayerSidebar />
           </div>
         )}
         <div className={styles.map}>
-          <Map viewportFromUrl onClick={onClick}>
+          <Map
+            viewportFromUrl
+            onClick={onClick}
+            onViewportChange={onViewportChange}
+          >
             <Button
               style={{
-                position: 'absolute',
+                position: "absolute",
                 left: 44,
                 top: 9,
               }}
@@ -175,10 +266,24 @@ export default function MapPage() {
               ))}
             </Source>
 
-            <RoadInfo {...{clickLocation}} />
+            {details?.type === "road" && details?.road?.road && (
+              <RoadInfo
+                roadInfo={details.road}
+                mapInfoPortal={mapInfoPortal.current}
+                onClose={onCloseDetails}
+              />
+            )}
+
+            {details?.type === "region" && details?.region && (
+              <RegionInfo
+                region={details.region}
+                mapInfoPortal={mapInfoPortal.current}
+                onClose={onCloseDetails}
+              />
+            )}
           </Map>
         </div>
       </div>
     </Page>
-  )
+  );
 }

frontend/src/pages/MapPage/styles.module.less

@@ -20,11 +20,38 @@
 }
 
 .mapInfoBox {
-  position: absolute;
-  right: 0;
-  top: 0;
-  max-height: 100%;
   width: 36rem;
   overflow: auto;
-  margin: 20px;
+  border-left: 1px solid @borderColor;
+  background: white;
+  padding: 16px;
+}
+
+.closeHeader {
+  display: flex;
+  align-items: baseline;
+  justify-content: space-between;
+}
+
+
+@media @mobile {
+  .mapContainer {
+    height: auto;
+    min-height: calc(100vh - @menuHeight);
+    flex-direction: column;
+  }
+
+  .map {
+    height: 60vh;
+  }
+
+  .mapSidebar {
+    width: auto;
+    height: auto;
+  }
+
+  .mapInfoBox {
+    width: auto;
+    height: auto;
+  }
 }

frontend/src/reducers/mapConfig.ts

@@ -26,6 +26,9 @@ export type MapConfig = {
   obsEvents: {
     show: boolean;
   };
+  obsRegions: {
+    show: boolean;
+  };
 };
 
 export const initialState: MapConfig = {
@@ -41,6 +44,9 @@ export const initialState: MapConfig = {
   obsEvents: {
     show: false,
   },
+  obsRegions: {
+    show: true,
+  },
 };
 
 type MapConfigAction = {

roads_import.lua

@@ -50,6 +50,9 @@ local MOTORWAY_TYPES = {
   "motorway_link",
 }
 
+local ADMIN_LEVEL_MIN = 2
+local ADMIN_LEVEL_MAX = 8
+
 local ONEWAY_YES = {"yes", "true", "1"}
 local ONEWAY_REVERSE = {"reverse", "-1"}
 
@@ -61,6 +64,14 @@ local roads = osm2pgsql.define_way_table('road', {
   { column = 'oneway', type = 'bool' },
 })
 
+local regions = osm2pgsql.define_relation_table('region', {
+  { column = 'name', type = 'text' },
+  { column = 'geometry', type = 'geometry' },
+  { column = 'admin_level', type = 'int' },
+  { column = 'tags', type = 'hstore' },
+})
+
+
 function osm2pgsql.process_way(object)
   if object.tags.highway and contains(HIGHWAY_TYPES, object.tags.highway) then
     local tags = object.tags
@@ -112,3 +123,21 @@ function osm2pgsql.process_way(object)
     })
   end
 end
+
+function osm2pgsql.process_relation(object)
+  local admin_level = tonumber(object.tags.admin_level)
+  if object.tags.boundary == "administrative" and admin_level and admin_level >= ADMIN_LEVEL_MIN and admin_level <= ADMIN_LEVEL_MAX then
+    regions:add_row({
+      geometry = { create = 'area' },
+      name = object.tags.name,
+      admin_level = admin_level,
+      tags = object.tags,
+    })
+  end
+end
+
+function osm2pgsql.select_relation_members(relation)
+    if relation.tags.type == 'route' then
+        return { ways = osm2pgsql.way_member_ids(relation) }
+    end
+end

tile-generator/layers/obs_events/layer.sql

@@ -11,6 +11,8 @@ RETURNS TABLE(event_id bigint, geometry geometry, distance_overtaker float, dist
       speed,
       way_id::bigint as way_id
     FROM overtaking_event
-    WHERE ST_Transform(overtaking_event.geometry, 3857) && bbox;
+    WHERE
+      zoom_level >= 10 AND
+      ST_Transform(overtaking_event.geometry, 3857) && bbox;
 
 $$ LANGUAGE SQL IMMUTABLE;

tile-generator/layers/obs_regions/layer.sql

@@ -0,0 +1,26 @@
+DROP FUNCTION IF EXISTS layer_obs_regions(geometry, int);
+
+CREATE OR REPLACE FUNCTION layer_obs_regions(bbox geometry, zoom_level int)
+RETURNS TABLE(
+  region_id bigint,
+  geometry geometry,
+  name text,
+  admin_level int,
+  overtaking_event_count int
+) AS $$
+
+    SELECT
+      region.relation_id::bigint as region_id,
+      ST_SimplifyPreserveTopology(region.geometry, ZRes(zoom_level + 2)) as geometry,
+      region.name as name,
+      region.admin_level as admin_level,
+      count(overtaking_event.id)::int as overtaking_event_count
+    FROM region
+      LEFT JOIN overtaking_event on ST_Within(ST_Transform(overtaking_event.geometry, 3857), region.geometry)
+    WHERE
+      zoom_level >= 4 AND
+      zoom_level <= 12 AND
+      ST_Transform(region.geometry, 3857) && bbox
+    GROUP BY region.relation_id, region.name, region.geometry, region.admin_level
+
+$$ LANGUAGE SQL IMMUTABLE;

tile-generator/layers/obs_regions/obs_regions.yaml

@@ -0,0 +1,23 @@
+layer:
+  id: "obs_regions"
+  description: |
+      Statistics on administrative boundary areas ("regions")
+  buffer_size: 4
+  fields:
+    overtaking_event_count: |
+      Number of overtaking events.
+    name: |
+      Name of the region
+    admin_level: |
+      Administrative level of the boundary, as tagged in OpenStreetMap
+  defaults:
+    srs: EPSG:3785
+  datasource:
+    srid: 3857
+    geometry_field: geometry
+    key_field: region_id
+    key_field_as_attribute: no
+    query: (SELECT region_id, geometry, name, admin_level, overtaking_event_count FROM layer_obs_regions(!bbox!, z(!scale_denominator!))) AS t
+
+schema:
+  - ./layer.sql

tile-generator/layers/obs_roads/layer.sql

@@ -32,7 +32,9 @@ RETURNS TABLE(
     LEFT JOIN (VALUES (-1, TRUE), (1, FALSE), (0, FALSE)) AS r(dir, rev) ON (abs(r.dir) != road.directionality)
     FULL OUTER JOIN overtaking_event ON (road.way_id = overtaking_event.way_id and (road.directionality != 0 or overtaking_event.direction_reversed = r.rev))
     -- WHERE road.name = 'Merzhauser Straße'
-    WHERE road.geometry && bbox
+    WHERE
+      zoom_level >= 10 AND
+      road.geometry && bbox
     GROUP BY road.name, road.way_id, road.geometry, road.directionality, r.dir, r.rev;
 
 $$ LANGUAGE SQL IMMUTABLE;

tile-generator/openbikesensor.yaml

@@ -3,6 +3,7 @@ tileset:
   layers:
     - layers/obs_events/obs_events.yaml
     - layers/obs_roads/obs_roads.yaml
+    - layers/obs_regions/obs_regions.yaml
   version: 0.6.2
   id: openbikesensor
   description: >