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Use TopoJSON for smaller files

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This commit is contained in:
Norbert Renner 2021-01-22 11:50:27 +01:00
parent dc8302479e
commit 3037fb8f17
8 changed files with 64 additions and 24 deletions
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32
js/Util.js
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@ -30,6 +30,38 @@ BR.Util = {
return new Error(msg);
},
getJson: function (url, context, cb) {
BR.Util.get(url, function (err, data) {
if (err) {
BR.message.showError('Error getting ' + context + ': ' + err);
return cb(err);
}
try {
var json = JSON.parse(data);
cb(null, json);
} catch (err) {
BR.message.showError('Error parsing ' + context + ': ' + err);
console.error(err);
cb(err);
}
});
},
getGeoJson: function (url, context, cb) {
BR.Util.getJson(url, context, function (err, data) {
if (err) return cb(err);
var geoJson = data;
if (data && data.type && data.type === 'Topology') {
var key = Object.keys(data.objects)[0];
geoJson = topojson.feature(data, data.objects[key]);
}
cb(null, geoJson);
});
},
// check if localStorage is available, especially for catching SecurityError
// when cookie settings are blocking access (Chrome, Pale Moon, older Firefox)
//