geojson-polyline/dist/geojson-polyline.min.js

Convert GeoJSON coordinates to and from encoded polylines. Supports all major GeoJSON types.

(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.GeoJSONPolyline=f()}})(function(){var define,module,exports;return function(){function r(e,n,t){function o(i,f){if(!n[i]){if(!e[i]){var c="function"==typeof require&&require;if(!f&&c)return c(i,!0);if(u)return u(i,!0);var a=new Error("Cannot find module '"+i+"'");throw a.code="MODULE_NOT_FOUND",a}var p=n[i]={exports:{}};e[i][0].call(p.exports,function(r){var n=e[i][1][r];return o(n||r)},p,p.exports,r,e,n,t)}return n[i].exports}for(var u="function"==typeof require&&require,i=0;i<t.length;i++)o(t[i]);return o}return r}()({1:[function(require,module,exports){var assign=require("object-assign");var polyline=require("@mapbox/polyline");var GeoJSONPolyline=module.exports={encode:geo2poly,decode:poly2geo,geojson:poly2geo,geoJson:poly2geo,geoJSON:poly2geo,polyline:geo2poly,polyLine:geo2poly,toEncoded:geo2poly,fromEncoded:poly2geo,toGeoJSON:poly2geo,fromGeoJSON:geo2poly,toPolyline:geo2poly,fromPolyline:poly2geo};function geo2poly(geojson,options){var precision=typeof options==="object"&&options.precision;switch(geojson.type){case"Point":{return assign({},geojson,{coordinates:encode([geojson.coordinates],precision)})}case"MultiPoint":case"LineString":{return assign({},geojson,{coordinates:encode(geojson.coordinates,precision)})}case"MultiLineString":case"Polygon":{return assign({},geojson,{coordinates:geojson.coordinates.map(function(coords){return encode(coords,precision)})})}case"Feature":{return assign({},geojson,{geometry:geo2poly(geojson.geometry,precision)})}case"FeatureCollection":{return assign({},geojson,{features:geojson.features.map(function(feature){return geo2poly(feature,precision)})})}case"GeometryCollection":{return assign({},geojson,{geometries:geojson.geometries.map(function(geo){return geo2poly(geo,precision)})})}case"MultiPolygon":{return assign({},geojson,{coordinates:geojson.coordinates.map(function(polygons){return polygons.map(function(coords){return encode(coords,precision)})})})}default:return geojson}}function poly2geo(geojson,options){var precision=typeof options==="object"&&options.precision;switch(geojson.type){case"Point":{return assign({},geojson,{coordinates:decode(geojson.coordinates,precision)[0]})}case"MultiPoint":case"LineString":{return assign({},geojson,{coordinates:decode(geojson.coordinates,precision)})}case"MultiLineString":case"Polygon":{return assign({},geojson,{coordinates:geojson.coordinates.map(function(coords){return decode(coords,precision)})})}case"MultiPolygon":{return assign({},geojson,{coordinates:geojson.coordinates.map(function(polygons){return polygons.map(function(coords){return decode(coords,precision)})})})}case"Feature":{return assign({},geojson,{geometry:poly2geo(geojson.geometry,precision)})}case"FeatureCollection":{return assign({},geojson,{features:geojson.features.map(function(feature){return poly2geo(feature,precision)})})}case"GeometryCollection":{return assign({},geojson,{geometries:geojson.geometries.map(function(geometry){return poly2geo(geometry,precision)})})}default:return geojson}}function encode(coordinates,precision){return polyline.encode(flip(coordinates),precision)}function decode(str,precision){return flip(polyline.decode(str,precision))}function flip(coords){var flipped=[];for(var i=0;i<coords.length;i++){flipped.push(coords[i].slice().reverse())}return flipped}if(typeof addEventListener!=="undefined"){addEventListener("message",function(message){var method=message.data[0];if(method in GeoJSONPolyline){var geojson=message.data[1];var precision=message.data[2];var converted=GeoJSONPolyline[method](geojson,precision);postMessage(converted)}})}},{"@mapbox/polyline":2,"object-assign":3}],2:[function(require,module,exports){"use strict";var polyline={};function py2_round(value){return Math.floor(Math.abs(value)+.5)*(value>=0?1:-1)}function encode(current,previous,factor){current=py2_round(current*factor);previous=py2_round(previous*factor);var coordinate=current-previous;coordinate<<=1;if(current-previous<0){coordinate=~coordinate}var output="";while(coordinate>=32){output+=String.fromCharCode((32|coordinate&31)+63);coordinate>>=5}output+=String.fromCharCode(coordinate+63);return output}polyline.decode=function(str,precision){var index=0,lat=0,lng=0,coordinates=[],shift=0,result=0,byte=null,latitude_change,longitude_change,factor=Math.pow(10,precision||5);while(index<str.length){byte=null;shift=0;result=0;do{byte=str.charCodeAt(index++)-63;result|=(byte&31)<<shift;shift+=5}while(byte>=32);latitude_change=result&1?~(result>>1):result>>1;shift=result=0;do{byte=str.charCodeAt(index++)-63;result|=(byte&31)<<shift;shift+=5}while(byte>=32);longitude_change=result&1?~(result>>1):result>>1;lat+=latitude_change;lng+=longitude_change;coordinates.push([lat/factor,lng/factor])}return coordinates};polyline.encode=function(coordinates,precision){if(!coordinates.length){return""}var factor=Math.pow(10,precision||5),output=encode(coordinates[0][0],0,factor)+encode(coordinates[0][1],0,factor);for(var i=1;i<coordinates.length;i++){var a=coordinates[i],b=coordinates[i-1];output+=encode(a[0],b[0],factor);output+=encode(a[1],b[1],factor)}return output};function flipped(coords){var flipped=[];for(var i=0;i<coords.length;i++){flipped.push(coords[i].slice().reverse())}return flipped}polyline.fromGeoJSON=function(geojson,precision){if(geojson&&geojson.type==="Feature"){geojson=geojson.geometry}if(!geojson||geojson.type!=="LineString"){throw new Error("Input must be a GeoJSON LineString")}return polyline.encode(flipped(geojson.coordinates),precision)};polyline.toGeoJSON=function(str,precision){var coords=polyline.decode(str,precision);return{type:"LineString",coordinates:flipped(coords)}};if(typeof module==="object"&&module.exports){module.exports=polyline}},{}],3:[function(require,module,exports){"use strict";var getOwnPropertySymbols=Object.getOwnPropertySymbols;var hasOwnProperty=Object.prototype.hasOwnProperty;var propIsEnumerable=Object.prototype.propertyIsEnumerable;function toObject(val){if(val===null||val===undefined){throw new TypeError("Object.assign cannot be called with null or undefined")}return Object(val)}function shouldUseNative(){try{if(!Object.assign){return false}var test1=new String("abc");test1[5]="de";if(Object.getOwnPropertyNames(test1)[0]==="5"){return false}var test2={};for(var i=0;i<10;i++){test2["_"+String.fromCharCode(i)]=i}var order2=Object.getOwnPropertyNames(test2).map(function(n){return test2[n]});if(order2.join("")!=="0123456789"){return false}var test3={};"abcdefghijklmnopqrst".split("").forEach(function(letter){test3[letter]=letter});if(Object.keys(Object.assign({},test3)).join("")!=="abcdefghijklmnopqrst"){return false}return true}catch(err){return false}}module.exports=shouldUseNative()?Object.assign:function(target,source){var from;var to=toObject(target);var symbols;for(var s=1;s<arguments.length;s++){from=Object(arguments[s]);for(var key in from){if(hasOwnProperty.call(from,key)){to[key]=from[key]}}if(getOwnPropertySymbols){symbols=getOwnPropertySymbols(from);for(var i=0;i<symbols.length;i++){if(propIsEnumerable.call(from,symbols[i])){to[symbols[i]]=from[symbols[i]]}}}}return to}},{}]},{},[1])(1)});