Function calcGeoJSON

src/traces/choropleth/plot.js:31–73

(calcTrace, fullLayout)

}

function calcGeoJSON(calcTrace, fullLayout) {
    var trace = calcTrace[0].trace;
    var geoLayout = fullLayout[trace.geo];
    var geo = geoLayout._subplot;
    var locationmode = trace.locationmode;
    var len = trace._length;

    var features = locationmode === 'geojson-id' ?
        geoUtils.extractTraceFeature(calcTrace) :
        getTopojsonFeatures(trace, geo.topojson);

    var lonArray = [];
    var latArray = [];

    for(var i = 0; i < len; i++) {
        var calcPt = calcTrace[i];
        var feature = locationmode === 'geojson-id' ?
            calcPt.fOut :
            geoUtils.locationToFeature(locationmode, calcPt.loc, features);

        if(feature) {
            calcPt.geojson = feature;
            calcPt.ct = feature.properties.ct;
            calcPt._polygons = geoUtils.feature2polygons(feature);

            var bboxFeature = geoUtils.computeBbox(feature);
            lonArray.push(bboxFeature[0], bboxFeature[2]);
            latArray.push(bboxFeature[1], bboxFeature[3]);
        } else {
            calcPt.geojson = null;
        }
    }

    if(geoLayout.fitbounds === 'geojson' && locationmode === 'geojson-id') {
        var bboxGeojson = geoUtils.computeBbox(geoUtils.getTraceGeojson(trace));
        lonArray = [bboxGeojson[0], bboxGeojson[2]];
        latArray = [bboxGeojson[1], bboxGeojson[3]];
    }

    var opts = {padded: true};
    trace._extremes.lon = findExtremes(geoLayout.lonaxis._ax, lonArray, opts);
    trace._extremes.lat = findExtremes(geoLayout.lataxis._ax, latArray, opts);
}

module.exports = {
    calcGeoJSON: calcGeoJSON,