如何计算ngmap多边形的中心？

Question

我正在使用ngmap，每当我导入KML多边形文件时，多边形就会被淹没在地图上。 我有一个关于缩放多边形的问题。 有没有办法计算多边形中心（纬度和经度）？ 如果没有，那么无论如何都要在ngmap上绘制多边形后进行缩放。

谢谢

Answer 1

每当添加KML图层并将 var id_ele; $(".container-fluid .row").hover(function(){ id_ele = ''; id_ele = $(this).attr('id'); id_ele = '#' + id_ele; $('.nav--beca').find("a[href*='"+id_ele + "']").addClass('nav__item--current'); }, function(){ $('.nav--beca').find("a[href*='"+id_ele + "']").removeClass('nav__item--current'); }); 指令的Public Function unikue(BigString As String, LittleString As String) As String Dim B As Variant, L As Variant, Barr, Larr Dim Good As Boolean Barr = Split(BigString, ",") Larr = Split(LittleString, ",") For Each B In Barr Good = True For Each L In Larr If L = B Then Good = False Next If Good Then unikue = unikue & "," & B Next B If unikue <> "" Then unikue = Mid(unikue, 2) End Function 属性设置为preserve-viewport时，地图就会根据图层视口自动居中（这也意味着不需要明确指定中心）

确定KML图层中心：

1）设置kml-layer指令的true属性以引用KML图层

id

2）渲染图层后，获取KML图层的实例，然后通过kml-layer函数获取中心：

<kml-layer preserve-viewport="true" id="myLayer" url="http://googlemaps.github.io/js-v2-samples/ggeoxml/cta.kml"></kml-layer>

实施例

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google.maps.KmlLayer.getDefaultViewport

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NgMap.getMap().then(function(map) {
        var layer = map.kmlLayers["myLayer"]
        var center = layer.getDefaultViewport().getCenter();       
});

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