getpaths()多边形谷歌地图api

Question

我试图检索折线和多边形的latlng坐标.在完成任一对象的绘制后,我想将latlng存储在数据库中,但是现在我只是想在textarea中显示latlng.我已经足够容易地完成了标记,矩形和圆形,但折线和多边形的术语令我感到困惑.当我完成绘图时,我使用addDomListener(drawingManager,'polygoncomplete',...用于多边形,然后遍历我绘制的所有多边形.对于每个多边形,我然后迭代它的coords数组.我搜索了这个论坛数据库并在Google文档页面上尝试了百慕大三角形示例. 百慕大示例 我已多次阅读文档并且无法看到我遗漏的内容.感谢任何帮助.

//Save polygons data to text area
                var polygons = [];

                google.maps.event.addDomListener(drawingManager, 'polygoncomplete', function(polygon) {
                  polygons.push(polygon);
                });

                google.maps.event.addDomListener(savebutton, 'click', function() {
                    document.getElementById("savedatapolygon").value = "";
                    for (var i = 0; i < polygons.length; i++) {
                      var polygonBounds = polygons[i].getPath();
                      var xy;
                        // Iterate over the polygonBounds vertices.
                        for (var i = 0; i < polygonBounds.length; i++) {
                            xy = polygonBounds.getAt(i);
                            contentString += '<br>' + 'Coordinate: ' + i + '<br>' + xy.lat() +',' + xy.lng();
                        }
                      document.getElementById("savedatapolygon").value += "polygon(";
                      document.getElementById("savedatapolygon").value += contentString;
                      document.getElementById("savedatapolygon").value += ")";

                    }
        });

Answer 1

在谷歌地图多边形类返回回MVCArray.您需要使用MVCArray的forEach方法来循环它.

var polygonBounds = polygons[i].getPath();
// Iterate over the polygonBounds vertices.
polygonBounds.forEach(function(xy, i) {
  contentString += '<br>' + 'Coordinate: ' + i + '<br>' + xy.lat() +',' + xy.lng();
});
document.getElementById("savedatapolygon").value += "polygon(";
document.getElementById("savedatapolygon").value += contentString;
document.getElementById("savedatapolygon").value += ")";