Generating GeoJson with javascript
Generating GeoJson with javascript
我得到一个横向/纵向数组与ajax
$.ajax({
type: "POST",
url: '../m/m_share.php',
data: 'zone=' + zone,
dataType: 'json',
success: function(tab) {
var i = 0;
var size = tab.length;
for (i = 0; i < size; i++) {
var lat = tab[i]['lat'];
var lon = tab[i]['lon'];
}
}
"tab"参数是一个jscon_encode(数组)由php发送我的lat/lon请求从db。我想做的是创建一个地理json,如这个,但与我的经纬度数据。
var geojson =
{"name":"NewFeatureType",
"type":"FeatureCollection",
"features":[{"type":"Feature",
"geometry":{"type":"LineString",
"coordinates":[[169.13693,-44.696476,296],[169.134602,-44.69764,295],[169.129983,-44.701164,299]]},
"properties":null}]};
我试图将纬度保存在变量
中 $.ajax({
type: "POST",
url: '../m/m_share.php',
data: 'zone=' + zone,
dataType: 'json',
success: function(tab) {
var i = 0;
var size = tab.length;
for (i = 0; i < size; i++) {
var lat = tab[i]['lat'];
var lon = tab[i]['lon'];
if(i===size){
coord = coord+'['+lat+','+lon+']';
alert(coord);
}
else{
coord = coord+'['+lat+','+lon+']'+',';
}
}
}
});
然后用我的coord var替换geoJson中的纬度/纬度,但似乎传单不喜欢它"无效的LatLng对象:(NaN, NaN)"。
创建一个geojson对象变量
var geojson = {
"name":"NewFeatureType",
"type":"FeatureCollection",
"features":[{
"type":"Feature",
"geometry":{
"type":"LineString",
"coordinates":[]
},
"properties":null
}]
};
那么你就把它推入坐标数组
geojson.features[0].geometry.coordinates.push([lat, lng]);
Pedro Estrada提到的方法是正确的。但是需要做一点小小的修正。
GeoJson标准要求地理点具有(经度,纬度)约定。
var gj = {
"name":"MyFeatureType",
"type":"FeatureCollection",
"features":[]
};
推送一个新的特性对象
gj.features.push({ "type": "Feature","geometry": {"type": "LineString","coordinates": []},"properties": null });
为新推送的对象添加一个坐标:
lon=20;
lat=10;
gj.features[0].geometry.coordinates.push([lon,lat]);
相关文章:
- Modify Javascript with C#
- JavaScript with PHP SESSION
- Javascript with IE 11 issue
- javascript with()函数获胜'我不适合歌剧、Chrome或Brave
- Javascript with Heroku
- sqlite with javascript with phonegap using build.phonegap.co
- Including html+javascript with javascript
- .post javascript with PHP 以启用 select 语句返回
- Scrape query JavaScript with scrapy
- 正则表达式 JavaScript with punct,space 和 alnum
- writing JavaScript with PHP
- 将字符串从 C# 传递到 Javascript with Phonegap 和 Windows Phone 8
- Javascript with SJCL lib,在 GCM 模式下解密 AES
- Javascript with jquery datepicker using knockout
- Java to JavaScript with NodeJS convertion
- onMouseOver JavaScript with CSS list-style-image
- Appending on javascript with onclick
- javascript with html for stickynotes
- Scraping javascript with R
- Inserting javascript with jQuery .html