geojson

I am starting to use the Google Map Javascript API V3 and wish to display markers on a map, using GeoJSON. My GeoJSON is as follows: { "type": "FeatureCollection", "features": [ { "type": "Feature", "geometry": { "type": "Point", "coordinates": [153.236112, -27.779627] }, "properties": { "name": "[153.236112, -27.779627]", "description": "Timestamp: 16:37:16.293" } }, { "type": "Feature", "geometry": { "type": "Point", "coordinates": [153.230447, -27.777501] }, "properties": { "name": "[153.230447, -27.777501]", "description": "Timestamp: 16:37:26.298" } } ] } And my JavaScript code to load

After seeing a recent video by the Google Devs I decided to do a regional map of the UK. There were a couple of possibilities mentioned on this site that I've since had to dismiss* So I ended up using this site (example page of data downloads): http://mapit.mysociety.org/area/11804.html Notice the GeoJSON download as the third link down? Its about a 1Mb file size. When I first tried using it with my map: function initMap(){ var ukc = new google.maps.LatLng(54.8, -4.6); var mapOptions = { zoom: 5, center: ukc }; map = new google.maps.Map(document.getElementById('map-canvas'), mapOptions); map

Is it possible to determine whether a GeoJSON point at a given lat,lon lies within a given GeoJSON polygon using only JavaScript (either through d3, topojson, or any other way)? For example, I can draw a map showing countries in the UK based on the tutorial here . I then have a some points which have coordinates but no indication as to which country they lie within. I would like to display a total point count for each country. Can I work out which country contains each point in the browser, or do I need to preprocess my point data on the server using PostGIS or similar? Seems like d3 has you

I apologize if this is basic, but I have very limited javascript knowledge. I'm making a map that loads GeoJSON data that I created in ArcGIS reformatted to GeoJSON using ogr2ogr. I've got the map loading and showing the point markers from my GeoJSON file, and I've even got a styleFeature() function to set styling on the features based on their properties. The problem I'm having is trying to have infowindows pop up when a point feature is clicked on. I have successfully used the code to set a event listener and update the contents of a div with the information from a clicked feature: map.data

I would like to load two geojson layers to my map and be able to style them independently with different rules. I can display both my geojson files with the below code, but since they are both part of the same map.data object I have only been able to apply universal styling to both. Is there any way around this? Ultimately(longer term goal) I would also like to be able to toggle the different layers on and off with a checkbox as well (I am focusing on independent styling first so as not to overcomplicate the problem) function initialize() { map = new google.maps.Map(document.getElementById(

GeoJSON格式规范说明 1.简介 1.1.举例 2.GeoJSON对象 2.1几何对象 2.1.1.位置 2.1.2.点 2.1.3.多点 2.1.4.线 2.1.5.多线 2.1.6.面 2.1.7.多面 2.1.8.几何集合 2.2.特征对象 2.3.特征集合对象 3.坐标参考系统对象 3.1. 名字CRS 3.2. 连接CRS 3.2.1.连接对象 4.边界框 附录A.集合例子 点 线 面 多点 多线 多面 几何集合 GeoJSON是基于JavaScript 对象表示法的地理空间信息数据交换格式。 1.简介 GeoJSON是一种对各种地理数据结构进行编码的格式。GeoJSON对象可以表示几何、特征或者特征集合。GeoJSON支持下面几何类型：点、线、面、多点、多线、多面和几何集合。GeoJSON里的特征包含一个几何对象和其他属性，特征集合表示一系列特征。 一个完整的GeoJSON数据结构总是一个（JSON术语里的）对象。在GeoJSON里，对象由名/值对–也称作成员的集合组成。对每个成员来说，名字总是字符串。成员的值要么是字符串、数字、对象、数组，要么是下面文本常量中的一个：“true”,“false"和"null”。数组是由值是上面所说的元素组成。 1.1.举例 GeoJSON特征集合： { "type": "FeatureCollection", "features"