define([
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"ThirdParty/shapefile-js-3.3.2/shp",
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"ThirdParty/geojson-topojson/lib",
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'File'
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], function (
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shp,
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topojson,
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FileExtend
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) {
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/**
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* 提供shapefile格式矢量文件解析相关工具
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*@class shp
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*@memberof MeteoLib.Util
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*/
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/**
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*
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*@param {Array.<File>}files
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*@return {Object}
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* @method
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* @name groupFiles
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* @static
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* @memberof MeteoLib.Util.shp
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*/
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shp.groupFiles = function (files) {
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var shpFile, dbfFile, prjFile;
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var group = {};
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for (var i = 0; i < files.length; i++) {
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var name = Path.ChangeExtension(files[i].name, "");
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if (!group[name]) {
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group[name] = [];
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}
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group[name].push(files[i]);
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}
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return group;
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}
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/**
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*
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* @param {Array<File>}files
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* @param {Boolean}[toTopojson=false]
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* @method
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* @name parseShpFiles
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* @static
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* @memberof MeteoLib.Util.shp
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*/
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shp.parseShpFiles = function (files, toTopojson) {
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if (!files || files.length > 0) {
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var promise = Cesium.when.defer();
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var shpFile, dbfFile, prjFile;
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for (var i = 0; i < files.length; i++) {
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if (files[i].name.toLocaleLowerCase().indexOf(".shp") > 0) {
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shpFile = files[i];
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}
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if (files[i].name.toLocaleLowerCase().indexOf(".prj") > 0) {
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prjFile = files[i];
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}
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if (files[i].name.toLocaleLowerCase().indexOf(".dbf") > 0) {
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dbfFile = files[i];
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}
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}
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if (!shpFile || !prjFile || !dbfFile) {
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throw new Error("打开文件失败,请通过ctrl+同时选择shp、prj、dbf三个文件");
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return;
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}
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var readPromises = [
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File.readAsArrayBuffer(shpFile),
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File.readAsText(prjFile),
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File.readAsArrayBuffer(dbfFile)
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];
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Cesium.when.all(readPromises, function (buffers) {
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var shpBuffer = buffers[0];
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var prjBuffer = buffers[1];
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var dbfBuffer = buffers[2];
|
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var parsed = shp.combine([shp.parseShp(shpBuffer, prjBuffer), shp.parseDbf(dbfBuffer)]);
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parsed.fileName = shpFile.name.toLocaleLowerCase();
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if (toTopojson) {
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parsed = topojson.topology({
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collection: parsed
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}, {
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"property-transform": function (obj, name, value) {
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obj[name] = value;
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return obj;
|
}
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});
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parsed.fileName = shpFile.name.toLocaleLowerCase();
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}
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promise.resolve(parsed);
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}, function (err) {
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promise.reject(err);
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});
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return promise;
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} else {
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throw new Error("文件列表不能为空");
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}
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}
|
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return shp;
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})
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