我有一张使用leaflet.js绘制的地图.如果我给出经度和纬度值作为输入
我可以识别多边形吗？我可以为此获得客户端脚本吗？
我可以识别多边形吗？我可以为此获得客户端脚本吗？
解决方法
得到的答案如下：
//这是基于’多边形点算法’
function getPoint () {
float x=-89.82421875; //x and y represents the lat and lng values
float y= 40.18307014852533;
var a = boundaries; //the coordinates used to draw the map
for (i = 0; i < a.features.length; i++) {
PointInPolygon(x,y,a.features[i].geometry.coordinates[0],i);
}
};
function PointInPolygon(pointX,pointY,_vertices,number) {
var j = _vertices.length - 1;
var oddNodes = false;
var polyX,polyY,polyXJ,polyYJ;
for (var i = 0; i < _vertices.length; i++) {
polyY = parseFloat(_vertices[i].toString().split(",")[1]);
polyX = parseFloat(_vertices[i].toString().split(",")[0]);
polyXJ = parseFloat(_vertices[j].toString().split(",")[0]);
polyYJ = parseFloat(_vertices[j].toString().split(",")[1]);
if (polyY < pointY && polyYJ >= pointY ||
polyYJ < pointY && polyY >= pointY) {
if (polyX +
(pointY - polyY) / (polyYJ - polyY) * (polyXJ - polyX) < pointX)
{
oddNodes = !oddNodes;
}
}
j = i;
}
if (oddNodes == true) {
map._layers[number+1].fire('click'); //fire the map click event
}
}
