Get OL map working

This commit is contained in:
Shelby Switzer 2021-04-18 10:09:07 -04:00
parent efefb463fd
commit 68405e9e82
5 changed files with 611 additions and 20 deletions

View file

@ -2202,6 +2202,36 @@
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"integrity": "sha512-a5ebahrjF5yCPFle1rc0aHzKp/9A4LlUnjh+S3I+x4EgcvcddDhpOX3WDOs0Pg9/wEElrikHSGEvbeej2Hh4Ug==",
"requires": {
"pbf": "3.1.0",
"pixelworks": "1.1.0",
"rbush": "2.0.2"
"ol-mapbox-style": "^6.1.1",
"pbf": "3.2.1",
"rbush": "^3.0.1"
}
},
"ol-mapbox-style": {
"version": "6.3.2",
"resolved": "https://registry.npmjs.org/ol-mapbox-style/-/ol-mapbox-style-6.3.2.tgz",
"integrity": "sha512-itWZuwZHilztRM9983WmJ+ounaXIS0PdXF8h5xJd7cJhSv02M27w4RQkhiUw35/VLlUdTT/ei3KYi0w2TGDw2A==",
"requires": {
"@mapbox/mapbox-gl-style-spec": "^13.14.0",
"mapbox-to-css-font": "^2.4.0",
"webfont-matcher": "^1.1.0"
}
},
"omggif": {
@ -15409,12 +15771,12 @@
"integrity": "sha512-gDKb8aZMDeD/tZWs9P6+q0J9Mwkdl6xMV8TjnGP3qJVJ06bdMgkbBlLU8IdfOsIsFz2BW1rNVT3XuNEl8zPAvw=="
},
"pbf": {
"version": "3.1.0",
"resolved": "https://registry.npmjs.org/pbf/-/pbf-3.1.0.tgz",
"integrity": "sha512-/hYJmIsTmh7fMkHAWWXJ5b8IKLWdjdlAFb3IHkRBn1XUhIYBChVGfVwmHEAV3UfXTxsP/AKfYTXTS/dCPxJd5w==",
"version": "3.2.1",
"resolved": "https://registry.npmjs.org/pbf/-/pbf-3.2.1.tgz",
"integrity": "sha512-ClrV7pNOn7rtmoQVF4TS1vyU0WhYRnP92fzbfF75jAIwpnzdJXf8iTd4CMEqO4yUenH6NDqLiwjqlh6QgZzgLQ==",
"requires": {
"ieee754": "^1.1.6",
"resolve-protobuf-schema": "^2.0.0"
"ieee754": "^1.1.12",
"resolve-protobuf-schema": "^2.1.0"
}
},
"peek-readable": {
@ -17518,9 +17880,9 @@
"integrity": "sha512-NuaNSa6flKT5JaSYQzJok04JzTL1CA6aGhv5rfLW3PgqA+M2ChpZQnAC8h8i4ZFkBS8X5RqkDBHA7r4hej3K9A=="
},
"quickselect": {
"version": "1.1.1",
"resolved": "https://registry.npmjs.org/quickselect/-/quickselect-1.1.1.tgz",
"integrity": "sha512-qN0Gqdw4c4KGPsBOQafj6yj/PA6c/L63f6CaZ/DCF/xF4Esu3jVmKLUDYxghFx8Kb/O7y9tI7x2RjTSXwdK1iQ=="
"version": "2.0.0",
"resolved": "https://registry.npmjs.org/quickselect/-/quickselect-2.0.0.tgz",
"integrity": "sha512-RKJ22hX8mHe3Y6wH/N3wCM6BWtjaxIyyUIkpHOvfFnxdI4yD4tBXEBKSbriGujF6jnSVkJrffuo6vxACiSSxIw=="
},
"raf": {
"version": "3.4.1",
@ -17586,11 +17948,11 @@
}
},
"rbush": {
"version": "2.0.2",
"resolved": "https://registry.npmjs.org/rbush/-/rbush-2.0.2.tgz",
"integrity": "sha512-XBOuALcTm+O/H8G90b6pzu6nX6v2zCKiFG4BJho8a+bY6AER6t8uQUZdi5bomQc0AprCWhEGa7ncAbbRap0bRA==",
"version": "3.0.1",
"resolved": "https://registry.npmjs.org/rbush/-/rbush-3.0.1.tgz",
"integrity": "sha512-XRaVO0YecOpEuIvbhbpTrZgoiI6xBlz6hnlr6EHhd+0x9ase6EmeN+hdwwUaJvLcsFFQ8iWVF1GAK1yB0BWi0w==",
"requires": {
"quickselect": "^1.0.1"
"quickselect": "^2.0.0"
}
},
"rc": {
@ -19283,6 +19645,11 @@
"queue-microtask": "^1.2.2"
}
},
"rw": {
"version": "1.3.3",
"resolved": "https://registry.npmjs.org/rw/-/rw-1.3.3.tgz",
"integrity": "sha1-P4Yt+pGrdmsUiF700BEkv9oHT7Q="
},
"rxjs": {
"version": "6.6.7",
"resolved": "https://registry.npmjs.org/rxjs/-/rxjs-6.6.7.tgz",
@ -20298,6 +20665,16 @@
"url-parse": "^1.5.1"
}
},
"sort-asc": {
"version": "0.1.0",
"resolved": "https://registry.npmjs.org/sort-asc/-/sort-asc-0.1.0.tgz",
"integrity": "sha1-q3md9h/HPqCVbHnEtTHtHp53J+k="
},
"sort-desc": {
"version": "0.1.1",
"resolved": "https://registry.npmjs.org/sort-desc/-/sort-desc-0.1.1.tgz",
"integrity": "sha1-GYuMDN6wlcRjNBhh45JdTuNZqe4="
},
"sort-keys": {
"version": "2.0.0",
"resolved": "https://registry.npmjs.org/sort-keys/-/sort-keys-2.0.0.tgz",
@ -20336,6 +20713,15 @@
}
}
},
"sort-object": {
"version": "0.3.2",
"resolved": "https://registry.npmjs.org/sort-object/-/sort-object-0.3.2.tgz",
"integrity": "sha1-mODRme3kDgfGGoRAPGHWw7KQ+eI=",
"requires": {
"sort-asc": "^0.1.0",
"sort-desc": "^0.1.1"
}
},
"source-list-map": {
"version": "2.0.1",
"resolved": "https://registry.npmjs.org/source-list-map/-/source-list-map-2.0.1.tgz",
@ -22275,6 +22661,11 @@
"resolved": "https://registry.npmjs.org/web-namespaces/-/web-namespaces-1.1.4.tgz",
"integrity": "sha512-wYxSGajtmoP4WxfejAPIr4l0fVh+jeMXZb08wNc0tMg6xsfZXj3cECqIK0G7ZAqUq0PP8WlMDtaOGVBTAWztNw=="
},
"webfont-matcher": {
"version": "1.1.0",
"resolved": "https://registry.npmjs.org/webfont-matcher/-/webfont-matcher-1.1.0.tgz",
"integrity": "sha1-mM6VCXsp4x++czBT4Q5XFkLRxsc="
},
"webpack": {
"version": "5.33.2",
"resolved": "https://registry.npmjs.org/webpack/-/webpack-5.33.2.tgz",

View file

@ -17,6 +17,7 @@
"dependencies": {
"@mdx-js/mdx": "^1.6.22",
"@mdx-js/react": "^1.6.22",
"d3": "^6.7.0",
"gatsby": "^3.2.1",
"gatsby-plugin-image": "^1.3.0",
"gatsby-plugin-manifest": "^3.3.0",
@ -32,6 +33,7 @@
"gatsby-transformer-sharp": "^3.3.0",
"leaflet": "^1.7.1",
"netlify-cms-app": "^2.14.45",
"ol": "^6.5.0",
"react": "^17.0.2",
"react-dom": "^17.0.2",
"react-helmet": "^6.1.0",

View file

@ -0,0 +1,123 @@
// react
import React, { useState, useEffect, useRef } from 'react';
// openlayers
import Map from 'ol/Map'
import View from 'ol/View'
import TileLayer from 'ol/layer/Tile'
import VectorLayer from 'ol/layer/Vector'
import VectorSource from 'ol/source/Vector'
import XYZ from 'ol/source/XYZ'
import {transform} from 'ol/proj'
import {toStringXY} from 'ol/coordinate';
function OlMapWrapper(props) {
// set intial state
const [ map, setMap ] = useState()
const [ featuresLayer, setFeaturesLayer ] = useState()
const [ selectedCoord , setSelectedCoord ] = useState()
// pull refs
const mapElement = useRef()
// create state ref that can be accessed in OpenLayers onclick callback function
// https://stackoverflow.com/a/60643670
const mapRef = useRef()
mapRef.current = map
// initialize map on first render - logic formerly put into componentDidMount
useEffect( () => {
// create and add vector source layer
const initalFeaturesLayer = new VectorLayer({
source: new VectorSource()
})
// create map
const initialMap = new Map({
target: mapElement.current,
layers: [
// USGS Topo
new TileLayer({
source: new XYZ({
url: 'https://basemap.nationalmap.gov/arcgis/rest/services/USGSTopo/MapServer/tile/{z}/{y}/{x}',
})
}),
// Google Maps Terrain
/* new TileLayer({
source: new XYZ({
url: 'http://mt0.google.com/vt/lyrs=p&hl=en&x={x}&y={y}&z={z}',
})
}), */
initalFeaturesLayer
],
view: new View({
projection: 'EPSG:3857',
center: [0, 0],
zoom: 2
}),
controls: []
})
// set map onclick handler
initialMap.on('click', handleMapClick)
// save map and vector layer references to state
setMap(initialMap)
setFeaturesLayer(initalFeaturesLayer)
},[])
// update map if features prop changes - logic formerly put into componentDidUpdate
useEffect( () => {
if (props.features.length) { // may be null on first render
// set features to map
featuresLayer.setSource(
new VectorSource({
features: props.features // make sure features is an array
})
)
// fit map to feature extent (with 100px of padding)
map.getView().fit(featuresLayer.getSource().getExtent(), {
padding: [100,100,100,100]
})
}
},[props.features])
// map click handler
const handleMapClick = (event) => {
// get clicked coordinate using mapRef to access current React state inside OpenLayers callback
// https://stackoverflow.com/a/60643670
const clickedCoord = mapRef.current.getCoordinateFromPixel(event.pixel);
// transform coord to EPSG 4326 standard Lat Long
const transormedCoord = transform(clickedCoord, 'EPSG:3857', 'EPSG:4326')
// set React state
setSelectedCoord( transormedCoord )
console.log(transormedCoord)
}
// render component
return (
<div className="map-wrapper">
<div ref={mapElement} id="ol-map" className="map-container"></div>
</div>
)
}
export default OlMapWrapper

View file

@ -0,0 +1,68 @@
import React, { useState, useEffect } from 'react';
import Layout from '../components/layout';
import SEO from '../components/seo';
import GeoJSON from 'ol/format/GeoJSON'
import Feature from 'ol/Feature';
import OlMapWrapper from '../components/ol-map-wrapper'
// import OpenLayersMap from '../components/open-layers-map'
// import { fromLonLat, get } from 'ol/proj';
// import TileLayer from 'ol/layer/Tile';
// import OSM from 'ol/source/OSM';
// import XYZ from 'ol/source/XYZ';
// import Map from 'ol/Map';
// import View from 'ol/View';
// import MVT from 'ol/format/MVT';
// import TileSource from 'ol/source/Tile';
// import VectorTileLayer from 'ol/layer/VectorTile';
// import VectorTileSource from 'ol/source/VectorTile';
// import {Fill, Stroke, Style} from 'ol/style';
// import {schemeCategory10} from 'd3-scale-chromatic';
// markup
const OpenLayersPage = () => {
// set intial state
const [ features, setFeatures ] = useState([])
// initialization - retrieve GeoJSON features from Mock JSON API get features from mock
// GeoJson API (read from flat .json file in public directory)
useEffect( () => {
fetch('/mock-geojson-api.json')
.then(response => response.json())
.then( (fetchedFeatures) => {
// parse fetched geojson into OpenLayers features
// use options to convert feature from EPSG:4326 to EPSG:3857
const wktOptions = {
dataProjection: 'EPSG:4326',
featureProjection: 'EPSG:3857'
}
const parsedFeatures = new GeoJSON().readFeatures(fetchedFeatures, wktOptions)
// set features into state (which will be passed into OpenLayers
// map component as props)
setFeatures(parsedFeatures)
})
},[])
return (
<>
<Layout>
<SEO title="OpenLayers" />
<h1>OpenLayers</h1>
<OlMapWrapper features={features} />
</Layout>
</>
)
}
export default OpenLayersPage

View file

@ -6,6 +6,13 @@ $theme-image-path: '../../node_modules/uswds/src/img';
$theme-font-path: '../../node_modules/uswds/src/fonts';
@import '../../node_modules/uswds/';
// @import 'uswds';
@import '../../node_modules/ol/ol.css';
#map { height: 180px; }
#ol-map {
min-width: 600px;
min-height: 500px;
height: 500px;
width: 100%;
}