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geojson.js
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geojson.js
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// @flow
/**
* <!-- {"order": 3} -->
*
* # Show geojson
*
* Get instances of [google.maps.Map](https://developers.google.com/maps/documentation/javascript/reference/map)
* class and instance of _google.maps_ using _useMap_ hook.
*
* Then using [google api datalayer](https://developers.google.com/maps/documentation/javascript/datalayer) and
* [api reference](https://developers.google.com/maps/documentation/javascript/reference/data)
* just add geojson using _React.useEffect_ hook
*
*/
import * as React from 'react';
import { Map, useMap } from 'rgm';
import { useGoogleApiLoader } from '../dev-src/hooks';
import { Ratio } from '../dev-src/controls';
import type { StaticProps } from '../dev-src/doc.js';
// https://developers.google.com/maps/documentation/javascript/reference/map#MapOptions
const MAP_OPTIONS = {
zoom: 13,
center: {
lat: 46.22212,
lng: 6.14156,
},
// disable cmd-zoom and 2 fingers zoom I personally dislike it
gestureHandling: 'greedy',
clickableIcons: false,
};
const BG_STYLE = {
fillColor: 'transparent',
strokeColor: 'white',
strokeWeight: 6,
strokeOpacity: 1,
cursor: 'hand',
};
const FG_STYLE = {
fillColor: 'transparent',
strokeColor: 'blue',
strokeWeight: 2,
strokeOpacity: 1,
cursor: 'hand',
};
// https://developers.google.com/maps/documentation/javascript/datalayer
// https://developers.google.com/maps/documentation/javascript/reference/data
const GeoJson = ({ children }) => {
const { map } = useMap();
React.useEffect(() => {
let style = BG_STYLE;
// To prevent style blink we override style inside addListener
const addFeatureListener = map.data.addListener('addfeature', event => {
map.data.overrideStyle(event.feature, style);
});
const features = [];
// Add background white shaped border for better visibility
features.push(...map.data.addGeoJson(children));
// Add foreground thinner border with primary color
style = FG_STYLE;
features.push(...map.data.addGeoJson(children));
addFeatureListener.remove();
return () => {
features.forEach(feature => map.data.remove(feature));
};
}, [map, children]);
return null;
};
export default function GeoJSONPage(): React.Node {
const api = useGoogleApiLoader();
return (
<Ratio value={3 / 4}>
{api && (
<Map api={api} options={MAP_OPTIONS}>
<GeoJson>{geoJSON}</GeoJson>
</Map>
)}
</Ratio>
);
}
const geoJSON = {
type: 'Feature',
geometry: {
type: 'MultiPolygon',
coordinates: [
[
[
[6.166701, 46.224467],
[6.165925, 46.222455],
[6.1619, 46.215224],
[6.155766, 46.217359],
[6.151245, 46.216282],
[6.151087, 46.215332],
[6.150485, 46.215169],
[6.1509, 46.214227],
[6.150811, 46.214036],
[6.14938, 46.214312],
[6.149151, 46.214004],
[6.1494, 46.213891],
[6.148978, 46.213333],
[6.149199, 46.213245],
[6.149111, 46.213092],
[6.148458, 46.213299],
[6.148611, 46.213478],
[6.148046, 46.213725],
[6.14791, 46.213552],
[6.146289, 46.214207],
[6.146402, 46.214354],
[6.146021, 46.214516],
[6.145856, 46.214388],
[6.145229, 46.214795],
[6.145365, 46.214889],
[6.144523, 46.215537],
[6.140424, 46.215467],
[6.140431, 46.214992],
[6.140001, 46.214473],
[6.140495, 46.21431],
[6.140344, 46.213461],
[6.139154, 46.211822],
[6.138298, 46.212118],
[6.137611, 46.212103],
[6.137077, 46.212714],
[6.136788, 46.212579],
[6.136173, 46.21166],
[6.136793, 46.21125],
[6.136433, 46.210877],
[6.135918, 46.210767],
[6.136631, 46.210466],
[6.136455, 46.210278],
[6.135874, 46.210503],
[6.135143, 46.210281],
[6.135855, 46.209982],
[6.135933, 46.208969],
[6.135134, 46.20892],
[6.135138, 46.20837],
[6.1349, 46.208432],
[6.134884, 46.208718],
[6.133399, 46.209087],
[6.133291, 46.20889],
[6.132011, 46.209076],
[6.131403, 46.209387],
[6.131373, 46.209693],
[6.130356, 46.210561],
[6.129696, 46.210564],
[6.12969, 46.210818],
[6.129369, 46.21082],
[6.129375, 46.211045],
[6.129688, 46.211046],
[6.129688, 46.211504],
[6.12927, 46.211496],
[6.129271, 46.212405],
[6.129008, 46.212523],
[6.129764, 46.213246],
[6.129716, 46.213667],
[6.128841, 46.213665],
[6.127625, 46.214193],
[6.126112, 46.214342],
[6.125746, 46.214032],
[6.123964, 46.214867],
[6.124292, 46.215172],
[6.121739, 46.215671],
[6.119726, 46.216991],
[6.120624, 46.217769],
[6.122338, 46.216739],
[6.123393, 46.21744],
[6.124565, 46.217508],
[6.125727, 46.218289],
[6.126099, 46.218014],
[6.127509, 46.219169],
[6.128824, 46.220001],
[6.129532, 46.219521],
[6.129983, 46.219778],
[6.129575, 46.22013],
[6.130436, 46.220747],
[6.130256, 46.220853],
[6.130676, 46.221195],
[6.130523, 46.221425],
[6.130902, 46.221833],
[6.13211, 46.221023],
[6.13235, 46.221201],
[6.132201, 46.221296],
[6.133093, 46.221871],
[6.132963, 46.221989],
[6.133836, 46.222724],
[6.132913, 46.223371],
[6.133926, 46.224313],
[6.132755, 46.22515],
[6.131471, 46.22413],
[6.131008, 46.224101],
[6.129367, 46.225315],
[6.128872, 46.225032],
[6.127637, 46.22607],
[6.127951, 46.226179],
[6.128475, 46.225855],
[6.130178, 46.227029],
[6.12872, 46.228056],
[6.127686, 46.227353],
[6.126543, 46.22806],
[6.127468, 46.228897],
[6.127947, 46.2286],
[6.128718, 46.228867],
[6.131004, 46.230645],
[6.131211, 46.230302],
[6.132606, 46.230318],
[6.133546, 46.231009],
[6.133079, 46.231614],
[6.132808, 46.231513],
[6.132062, 46.232115],
[6.132336, 46.232319],
[6.131997, 46.232603],
[6.132238, 46.232774],
[6.131869, 46.233055],
[6.132281, 46.233307],
[6.132955, 46.23278],
[6.134405, 46.233909],
[6.135986, 46.234248],
[6.136307, 46.234193],
[6.137361, 46.233404],
[6.13613, 46.232762],
[6.136964, 46.231991],
[6.138166, 46.231296],
[6.135923, 46.230627],
[6.136604, 46.230069],
[6.13744, 46.228493],
[6.137943, 46.228181],
[6.139237, 46.228034],
[6.13947, 46.228662],
[6.138837, 46.228839],
[6.138821, 46.22961],
[6.138533, 46.230292],
[6.142864, 46.2293],
[6.143428, 46.230636],
[6.143698, 46.230099],
[6.145883, 46.228727],
[6.145576, 46.227293],
[6.146152, 46.226945],
[6.146293, 46.227101],
[6.146995, 46.226354],
[6.148206, 46.226053],
[6.148941, 46.227792],
[6.166701, 46.224467],
],
],
],
},
};
export const getStaticProps = async (): Promise<StaticProps> => {
// The best is to place this method at _app.js but this doesn't work now
const doc = await import('../dev-src/doc');
return doc.getStaticProps();
};