node-red-contrib-tak-registration
Version:
A Node-RED node to register to TAK and to help wrap files as datapackages to send to TAK
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JavaScript
import distance from "@turf/distance";
import { segmentReduce } from "@turf/meta";
/**
* Takes a {@link GeoJSON} and measures its length in the specified units, {@link (Multi)Point}'s distance are ignored.
*
* @name length
* @param {Feature<LineString|MultiLineString>} geojson GeoJSON to measure
* @param {Object} [options={}] Optional parameters
* @param {string} [options.units=kilometers] can be degrees, radians, miles, or kilometers
* @returns {number} length of GeoJSON
* @example
* var line = turf.lineString([[115, -32], [131, -22], [143, -25], [150, -34]]);
* var length = turf.length(line, {units: 'miles'});
*
* //addToMap
* var addToMap = [line];
* line.properties.distance = length;
*/
export default function length(geojson, options) {
if (options === void 0) { options = {}; }
// Calculate distance from 2-vertex line segments
return segmentReduce(geojson, function (previousValue, segment) {
var coords = segment.geometry.coordinates;
return previousValue + distance(coords[0], coords[1], options);
}, 0);
}