input type="button" class="btn" value="测面" id = "area"/>
        <input type="button" class="btn" value="测高" id = "height"/><br>
        <label id="result" style="margin-left: 10px;">当前多边形面积: 0</label>    
    </div>                                                                                            
    <script type="module">
        import planeData from './common/plane.js';
        const { createREGL, mat4, reshader } = maptalksgl;
        const MODES = ['points', 'lines', 'l