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Giorgi Ghviniashvili
Data Visualization Engineer
Published
Edited
Jan 9, 2020
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md`# Detect County from a coordinate`
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coord = [53.3885996, -6.3821885]; // Dublin (lat, long)
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detectRegion(coord, polygons)
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detectRegion(southDublin, polygons)
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c = [53.0328123, -7.298793300000001]; // Laoighis
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detectRegion(c, polygons)
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cork = [51.976779, -8.462159];
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detectRegion(cork, polygons)
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md`## function implementation`
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function detectRegion(point, features) {
var geometry = {
"type": "Point",
"coordinates": [point[1], point[0]]
};
var feature = features.filter(d => {
return turf.booleanContains(d.geometry, geometry)
})[0];
if (feature) {
return feature.properties.NAME_1;
}
return "";
}
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polygons = {
var featuresArr = features.features;
return featuresArr.map(feature => {
return turf.flatten(feature).features
}).flat()
}
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md`## Dependencies`
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