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Leaflet初級編 - Web地図サイトを構築してみよう-

Leaflet初級編 - Web地図サイトを構築してみよう-

FOSS4G 2016 TOKYO ハンズオンデイ 発表資料

Yasunori Kirimoto

November 04, 2016
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  1. Leaflet 初級編 MIERUNE, LLC. / Yasunori Kirimoto 2016.11.04 FOSS4G 2016

    TOKYO ハンズオン - Web地図サイトを構築してみよう-
  2. <!DOCTYPE html> <html lang="ja"> <head> <meta charset="UTF-8"> <title>Leaflet Sample</title> <!--

    Leafletライブラリ読み込み --> <script src="./library/leaflet-0.7.3/leaflet.js"></script> <link href="./library/leaflet-0.7.3/leaflet.css" rel="stylesheet" /> <!-- CSS読み込み --> <link href="./css/stylesheet.css" rel="stylesheet" /> </head> <body> <!-- Map読み込み --> <div id="map"></div> <!-- JS読み込み --> <script src="./js/script.js"></script> </body> </html> HTML
  3. html, body { height: 100%; padding: 0; margin: 0; }

    #map { z-index: 0; height: 100%; } CSS
  4. L.tileLayer('https://tile.mierune.co.jp/mierune_mono/{z}/{x}/{y}.png', { attribution: "Maptiles by <a href='http://mierune.co.jp/' target='_blank'>MIERUNE</a>, under CC

    BY. Data by <a href='http://osm.org/copyright' target='_blank'>OpenStreetMap</a> contributors, under ODbL." }).addTo(map); JS
  5. var t_pale = new L.tileLayer('https://cyberjapandata.gsi.go.jp/xyz/pale/{z}/{x}/{y}.png', { attribution: "<a href='http://www.gsi.go.jp/kikakuchousei/kikakuchousei40182.html' target='_blank'>国土地理院</a>"

    }); var t_ort = new L.tileLayer('https://cyberjapandata.gsi.go.jp/xyz/ort/{z}/{x}/{y}.jpg', { attribution: "<a href='http://www.gsi.go.jp/kikakuchousei/kikakuchousei40182.html' target='_blank'>国土地理院</a>" }); var o_std = new L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', { attribution: '&copy; <a href="http://osm.org/copyright">OpenStreetMap</a> contributors' }); var m_mono = new L.tileLayer('https://tile.mierune.co.jp/mierune_mono/{z}/{x}/{y}.png', { attribution: "Maptiles by <a href='http://mierune.co.jp/' target='_blank'>MIERUNE</a>, under CC BY. Data by <a href='http://osm.org/copyright' target='_blank'>OpenStreetMap</a> contributors, under ODbL." }); JS
  6. var lat = 35.680899409847584; var lng = 139.76712226867676; var map

    = L.map('map', { center: [lat, lng], zoom: 15, maxZoom: 18, zoomControl: true, layers: [m_mono] }); var Map_BaseLayer = { "地理院地図 淡色": t_pale, "地理院地図 オルソ": t_ort, "OpenStreetMap 標準": o_std, "MIERUNE地図 MONO": m_mono }; L.control.layers( Map_BaseLayer, null ).addTo(map); JS
  7. var map = L.map('map', { center: [lat, lng], zoom: 15,

    maxZoom: 18, zoomControl: false, layers: [m_mono] }); JS
  8. var IconPin01 = L.icon({ iconUrl: "./img/pin01.png", iconSize: [25, 25], iconAnchor:

    [0, 25], popupAnchor: [0, -35] }); var Map_Point = L.marker( [35.68089940984, 139.7671222686], { icon: IconPin01 } ).addTo(map); JS
  9. var Map_Polygon = L.polygon([ [35.675949251235025,139.76617813110352], [35.67410157813001,139.77188587188718], [35.67455478492641,139.77227210998535], [35.683757812281115,139.77862358093262], [35.68431553740134,139.77343082427979], [35.68469897115985,139.77094173431396],

    [35.679923346539084,139.76871013641357], [35.675949251235025,139.76617813110352] ],{ "color": "#E92D63", "weight": 3, "opacity": 0.8, "fillColor": "#562DE9", "fillOpacity": 0.4 }).addTo(map); JS
  10. var Map_AddLayer = { "Point": Map_Point, "Line": Map_Line, "Polygon": Map_Polygon

    }; L.control.layers( Map_BaseLayer, Map_AddLayer, {collapsed:false} ).addTo(map); JS
  11. var sampledata = { "type": "FeatureCollection", "crs": { "type": "name",

    "properties": { "name": "urn:ogc:def:crs:OGC:1.3:CRS84" } }, "features": [ { "type": "Feature", "properties": { "P13_003": "北6条エルムの里公園" }, "geometry": { "type": "Point", "coordinates": [ 141.34308642, 43.0666937 ] } }, { "type": "Feature", "properties": { "P13_003": "宮部記念緑地" }, "geometry": { "type": "Point", "coordinates": [ 141.33550164, 43.0666937 ] } }, { "type": "Feature", "properties": { "P13_003": "偕楽園緑地" }, "geometry": { "type": "Point", "coordinates": [ 141.34429626, 43.06828667 ] } }, { "type": "Feature", "properties": { "P13_003": "八軒コスモス公園" }, "geometry": { "type": "Point", "coordinates": [ 141.32328053000001, 43.08470141 ] } } ] }; GeoJSON
  12. var lat = 42.333174; var lng = 141.004646; var IconPin02

    = L.icon({ iconUrl: "./img/pin02.png", iconSize: [25, 25], iconAnchor: [15, 20], popupAnchor: [-5, -30] }); var PointAll = L.layerGroup().addTo(map); var PointGeojson = L.geoJson(pointdata, { onEachFeature: function (feature, layer) { var field ="目標地点: " + feature.properties.OBJECTID; layer.bindPopup(field); }, pointToLayer: function (feature, layer) { if (feature.properties.OBJECTID > 25) { return L.marker(layer, { icon: IconPin01 }); }else if (feature.properties.OBJECTID <= 25) { return L.marker(layer, { icon: IconPin02 }); } } }).addTo(PointAll); JS
  13. var LineAll = L.layerGroup().addTo(map); var line_geojson = L.geoJson(linedata, { style:

    { "color": "#58BE89", "weight": 3, "opacity": 0.7, "dashArray":[10, 5] }, onEachFeature: function (feature, layer) { var field ="距離(m): " + feature.properties.Shape_len; layer.bindPopup(field); }, clickable: true }).addTo(LineAll); var Map_AddLayer = { "目標地点": PointAll, "避難経路": LineAll }; JS
  14. var PolygonAll = L.layerGroup().addTo(map); var PolygonGeojson = L.geoJson(polygondata, { style:

    function(feature) { if (feature.properties.MEANmax_ < 2) { return { "color": "#90D6E5", "weight": 0.5, "fill": true, "fillColor":"#90D6E5", "fillOpacity":0.4 }; }else if (feature.properties.MEANmax_ >= 2 && feature.properties.MEANmax_ < 4) { return { "color": "#2A5CAA", "weight": 0.5, "fill": true, "fillColor":"#2A5CAA", "fillOpacity":0.4 }; }else if (feature.properties.MEANmax_ >= 4 && feature.properties.MEANmax_ < 6) { return { "color": "#F4EE4F", "weight": 0.5, "fill": true, "fillColor":"#F4EE4F", "fillOpacity":0.6 }; }else if (feature.properties.MEANmax_ >= 6 && feature.properties.MEANmax_ < 8) { JS
  15. onEachFeature: function (feature, layer) { var field ="浸水深さ(m): " +

    feature.properties.MEANmax_; layer.bindLabel(field); } JS