从纬度和经度中识别哪个是多边形

我有一张使用leaflet.js绘制的地图。 如果我将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？

Answer 1

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 } }