我对GeoJSON功能和多字形有疑问。
要求是显示包含所有德国邮政编码区域的地图。其中一些完全封闭在其他人中,需要从他们的父母那里切除。
在GeoJSON specs之后,我创建了一个几何节点的特征,如下所示:
{
"type": "MultiPolygon",
"coordinates": [
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}
坐标对象是一个多边形数组,在这种情况下只有一个,第一个键是外线,第二个元素是内部多边形。
使用http://geojsonlint.com/一切都显示为已被删除,我也有其他多边形以相同的方式构建(一个只能创建此结构的类),它们就像一个魅力。
但是在Google地图中,它会在父级内部绘制折线,并且不会遗漏颜色。 (Child元素到位,因此内部斑点比所有其他元素更暗)
我清除了缓存,更改了浏览器甚至移动到另一台PC,所以我认为它不是客户端缓存问题。
另一个更复杂的情况是这个区域,漂亮的莱茵城市:
{
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}
2个多边形是直接邻居并且共享一条中间线,左边的一个被正确切断,右边的一个与Euskirchen的相同。
再次使用geojsonlint.com
来验证发生了什么,我无法看到对象的问题,所以我认为可能存在某种缓存,阻止显示/造型恰当。
有趣的是:谷歌地图知道不应该有任何多边形,因为地图对象的点击事件会触发而不是数据层。
非常感谢帮助/提示。
答案 0 :(得分:0)
解决方案非常简单,正如Molle博士指出的那样。 Google Maps API Polygon with "Hole" In Center
Google Maps API和geojsonlint之间的渲染差异也是造成差异的原因。
当您的多边形点为顺时针方向时,所有内部多边形必须是逆时针方向,以便省略。
只需反转有问题的内部多边形中点的顺序。
就我而言:
<?php
$array = array_reverse($array);
?>