2b:null 2c:["$","title",null,{"children":"Mapbox Map Maker | datagenous | Observable"}] 31:T65f,map = { const graphic = svg` `; return graphic; }32:T22c9,mbxLogo = svg` `33:[] 2f:{"id":"10ba878d49917dd3","slug":"mapbox-map-maker","title":"Mapbox Map Maker","thumbnail":"450d80735f9c95bd895a5a2e4906ac2582c3f749c1b631800f1e5a7265fcd7f2","access_level":"public","create_time":"$D2020-08-24T18:11:12.234Z","update_time":"$D2020-08-24T18:14:02.187Z","view_time":null,"first_public_time":"$D2020-08-24T18:26:41.607Z","fork":{"id":"b862b67dfe5e2b02","slug":"mapbox-map-maker","title":"Mapbox Map Maker","owner":{"id":"eb234b21118ba2f1","login":"aboutaaron","name":"Aaron Williams"}},"stars":0,"starred":false,"owner":{"type":"team","id":"ad42203b295b2120","login":"datagenous","name":"datagenous","avatar_url":"https://avatars-next.observableusercontent.com/c8136cc7228bf2ad689462f6a332e51dc9984c845619ac0f34ca730875bf0c7a","tier":"pro"},"version":719,"publish_version":719,"role":null,"authored":false,"authors":[{"type":"individual","id":"c769c086dc13ecf8","login":"ilabra","name":"Ivan Labra","avatar_url":"https://avatars-next.observableusercontent.com/8987cd5cf963a88d75b064ff67e941a7c2177a1b95421a786776c355403f8bcb","tier":null}],"members":[{"type":"team","id":"ad42203b295b2120","login":"datagenous","name":"datagenous","avatar_url":"https://avatars-next.observableusercontent.com/c8136cc7228bf2ad689462f6a332e51dc9984c845619ac0f34ca730875bf0c7a","tier":"pro","role":"editor"},{"type":"individual","id":"c769c086dc13ecf8","login":"ilabra","name":"Ivan Labra","avatar_url":"https://avatars-next.observableusercontent.com/8987cd5cf963a88d75b064ff67e941a7c2177a1b95421a786776c355403f8bcb","tier":null,"role":"editor"}],"comments":[],"custom_thumbnail":false,"trashed":false,"subscribed":null,"forks":1,"collection":null,"type":"notebook","body":{"title":"Mapbox Map Maker","cells":[{"id":0,"value":"md`# Mapbox Map Maker\n\nMake a map using the Mapbox vector tile API.`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":76,"value":"$31","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":341,"value":"md`## Location`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":563,"value":"viewof selectedCity = select({\n title: 'Choose from selected locations in the U.S.',\n description:\n 'Choose map location from list. (Cities with population >= 300,000.)',\n value: '',\n options: [\n { label: '', value: '' },\n ...cities\n .filter(d => d.population >= 300000)\n .map(d => {\n if (d.name === 'Washington') d.name = 'District of Columbia';\n return d;\n })\n .map(({ name: label }) => ({\n label,\n value: label\n }))\n ]\n})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":543,"value":"viewof customCoords = coordinates({\n title: \"...or use custom coordinates\",\n description: html`Important! this will always supercede the city dropdown! Clear the inputs to use dropdown.`,\n submit: true\n})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":306,"value":"md`## Customize`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":349,"value":"viewof height = slider({\n min: 200, \n max: 1048, \n value: 600,\n title: \"Map height (in pixels)\",\n})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":559,"value":"viewof _width = slider({\n min: 200,\n max: 1048,\n value: width,\n title: \"Map width (in pixels)\"\n})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":243,"value":"viewof landColor = color({\n value: \"#fefefe\",\n title: \"Map palette\",\n description: \"Land\"\n})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":225,"value":"viewof waterColor = color({\n value: \"#acc8cc\",\n description: \"Water\"\n})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":232,"value":"viewof roadColor = color({\n value: \"#a5a5a5\",\n description: \"Roads\"\n})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":266,"value":"viewof minor_roads = slider({\n min: 0,\n max: max_road_size,\n value: 0.3,\n precision: 3,\n title: \"Road sizes (in pixels)\",\n description: \"Minor roads\"\n})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":273,"value":"viewof tertiary_roads = slider({\n min: 0, \n max: max_road_size, \n value: 0.5,\n precision: 3,\n description: \"Tertiary roads\"\n})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":276,"value":"viewof secondary_roads = slider({\n min: 0, \n max: max_road_size, \n value: 0.7,\n precision: 3,\n description: \"Secondary roads\"\n})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":287,"value":"viewof primary_roads = slider({\n min: 0, \n max: max_road_size, \n value: 0.9,\n precision: 3,\n description: \"Primary roads\"\n})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":293,"value":"viewof motorways = slider({\n min: 0, \n max: max_road_size, \n value: 1.5,\n precision: 3,\n description: \"Motorways\"\n})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":297,"value":"viewof motorway_links = slider({\n min: 0, \n max: max_road_size, \n value: 1.15,\n precision: 3,\n description: \"Motorway links\"\n})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":299,"value":"viewof rails = slider({\n min: 0, \n max: max_road_size, \n value: 0.51,\n precision: 3,\n description: \"Rails\"\n})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":280,"value":"viewof max_road_size = slider({\n min: 0, \n max: 5, \n step: 0.5, \n value: 2, \n title: \"Maximum road size\", \n description: \"The largest road size you want available for your map\"\n})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":223,"value":"md`---`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":502,"value":"md`#### Add your Mapbox access token\n\nThis project uses the [Mapbox's vector tile API](https://docs.mapbox.com/vector-tiles/reference/) to render the map imagery. Add your public access token below:`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":505,"value":"mapbox_access_token = `pk.eyJ1IjoiYWJvdXRhYXJvbiIsImEiOiJsRTRpMGJnIn0.aprlJ6wE1JQqBx4EH1lkMQ`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":304,"value":"md`---\n### Configuration`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":79,"value":"isLayer = (feature, layer) => feature.properties.class === layer","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":512,"value":"md`The access token is used below to fetch all the tile information from [Mapbox Streets](https://docs.mapbox.com/vector-tiles/reference/mapbox-streets-v8/).`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":20,"value":"tiles = Promise.all(tile().map(async t => {\n let data = new vt.VectorTile(new Protobuf(await d3.buffer(`https://a.tiles.mapbox.com/v4/mapbox.mapbox-streets-v8/${t.z}/${t.x}/${t.y}.mvt?access_token=${mapbox_access_token}`))).layers\n \n let keys = Object.keys(data)\n t.data = {}\n keys.map(key => {\n let collection = {\n type: \"FeatureCollection\",\n features: []\n }\n\n for (let i = 0; i < data[key].length; i++) {\n let feature = data[key].feature(i).toGeoJSON(t.x, t.y, t.z)\n if (key === 'water') {\n feature.properties['class'] = 'water'\n }\n collection.features.push(feature)\n }\n \n t.data[key] = collection\n })\n \n return t;\n}))","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":90,"value":"getLayers = key => {\n const flatten = (arr, depth = 1) => arr.reduce((a, v) => a.concat(depth > 1 && Array.isArray(v) ? flatten(v, depth - 1) : v), [])\n \n return [ ...new Set(\n flatten(\n tiles.map(d => {\n if (d.data[key]) {\n return d.data[key].features.map(d => d.properties.class)\n }\n })\n )\n )\n ]\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":86,"value":"path = d3.geoPath(projection)","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":84,"value":"filter = function(d, test) {\n if (!d) return { type: \"FeatureCollection\", features: [] }; \n return { type: \"FeatureCollection\", features: d.features.filter(test) };\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":16,"value":"tile = d3.tile()\n .size([width, height])\n .scale(projection.scale() * 2 * Math.PI)\n .translate(projection([0,0]))","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":603,"value":"getSelectedCityCoords = cityname => {\n const [city] = cities.filter(d => d.name === cityname);\n if (city === undefined) {\n return [null, null];\n } else {\n const {\n geometry: { coordinates }\n } = city;\n return coordinates;\n }\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":614,"value":"getCoords = cityname => {\n const selectedCityCoords = getSelectedCityCoords(cityname);\n\n if (customCoords.includes(null) && selectedCityCoords.includes(null)) {\n return [-122.2711137, 37.8043637];\n } else if (\n !customCoords.includes(null) &&\n selectedCityCoords.includes(null)\n ) {\n return customCoords;\n } else if (\n !selectedCityCoords.includes(null) &&\n customCoords.includes(null)\n ) {\n return selectedCityCoords;\n } else {\n // they're both included so select custom city coords\n // viewof selectedCity.value = '';\n // viewof selectedCity.dispatchEvent(new CustomEvent(\"input\"));\n return customCoords;\n }\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":12,"value":"projection = d3\n .geoMercator()\n .center([coords[0], coords[1]])\n .scale(800000 / (2 * Math.PI))\n .translate([width / 2, height / 2])","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":709,"value":"coords = getCoords(selectedCity)","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":10,"value":"json = async url => {\n const { features } = await d3.json(url);\n return features;\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":5,"value":"d3 = require(\"d3-geo@1\", \"d3-selection@1\", \"d3-fetch@1\", \"d3-tile@0.0\");","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":23,"value":"vt = require('https://bundle.run/@mapbox/vector-tile@1.3.1')","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":27,"value":"Protobuf = require('https://bundle.run/pbf@3.1.0')","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":530,"value":"import { cities } from '@datadesk/swana-population-map'","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":216,"value":"import {\n color,\n number,\n text,\n slider,\n select,\n coordinates\n} from \"@jashkenas/inputs\"","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":446,"value":"md`##### Mapbox attribution code\n---`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":492,"value":" attributionHeight = height","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":494,"value":"attributionWidth = width","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":436,"value":"attribution = {\n return svg`\n \n ${mbxLogo}\n \n © Mapbox © OpenStreetMap\n \n `\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":378,"value":"$32","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"}],"files":"$W33","stdlib":"1","titling":"auto"}} 30:"$2f:body"