@mapgis/webclient-leaflet-plugin/dist/es5/webclient-leaflet-plugin.min.js

开发时需要引入MapGIS Client for JavaScript（Leaflet）开发包；其中包括必备的 CSS 文件和 JS 文件；

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/*
    object-assign
    (c) Sindre Sorhus
    @license MIT
    */
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/**
     * @license GNU Affero General Public License.
     * Copyright (c) 2015, 2015 Ronny Lorenz <ronny@tbi.univie.ac.at>
     * v. 1.2.0
     * https://github.com/RaumZeit/MarchingSquares.js
     *
     * MarchingSquaresJS is free software: you can redistribute it and/or modify
     * it under the terms of the GNU Affero General Public License as published by
     * the Free Software Foundation, either version 3 of the License, or
     * (at your option) any later version.
     *
     * MarchingSquaresJS is distributed in the hope that it will be useful,
     * but WITHOUT ANY WARRANTY; without even the implied warranty of
     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     * GNU Affero General Public License for more details.
     *
     * As additional permission under GNU Affero General Public License version 3
     * section 7, third-party projects (personal or commercial) may distribute,
     * include, or link against UNMODIFIED VERSIONS of MarchingSquaresJS without the
     * requirement that said third-party project for that reason alone becomes
     * subject to any requirement of the GNU Affero General Public License version 3.
     * Any modifications to MarchingSquaresJS, however, must be shared with the public
     * and made available.
     *
     * In summary this:
     * - allows you to use MarchingSquaresJS at no cost
     * - allows you to use MarchingSquaresJS for both personal and commercial purposes
     * - allows you to distribute UNMODIFIED VERSIONS of MarchingSquaresJS under any
     *   license as long as this license notice is included
     * - enables you to keep the source code of your program that uses MarchingSquaresJS
     *   undisclosed
     * - forces you to share any modifications you have made to MarchingSquaresJS,
     *   e.g. bug-fixes
     *
     * You should have received a copy of the GNU Affero General Public License
     * along with MarchingSquaresJS.  If not, see <http://www.gnu.org/licenses/>.
     */
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