geojson

I'm trying to build a GeoJSON object . My input is a csv with an address column, a lat column, and a lon column. I then created Shapely points out of the coordinates , buffer them out by a given radius, and get the dictionary of coordinates via the mapping option- so far, so good. Then, after referring to this question , I wrote the following function to get a Series of dictionaries: def make_geojson(row): return {'geometry':row['geom'], 'properties':{'address':row['address']}} and I applied it thusly: data['new_output'] = data.apply(make_geojson, axis=1) My resulting column is full of these:

I use leaflet-angular-directive, i successfully display objects in table and map, although i achieved filtering through searching input only affect geojson objects in table. My aim: make filtering through searching input affect geojson objects in table and map. My Module var AppMapDirectory = angular.module('DirectoryAppMap', ['ngResource', 'leaflet- directive']); My Factory AppMapDirectory.factory("Directory", function($resource) { return $resource("json/result.json", {}, { get: { method: "GET", cache: true } }); }); My Controller AppMapDirectory.controller("DirectoryMapList", function($scope

I am new to leaflet and JavaScript. I was thinking I could use geocommons and GeoJSON to host data for a mapping project. I found External GeoJSON and Leaflet: The Other Way(s) . This tutorial on reading external GeoJSON using a leaflet plugin but I haven't been able to get it to get the points to render on my map. The map portion of the code renders fine but the GeoJSON won't appear. var geojsonLayer = new L.GeoJSON.AJAX("http://geocommons.com/datasets/168923/features.json?lat=53.796&lon=-1.551&radius=3&callback=?", {onEachFeature:popUp}); function popUp(feature, layer) { layer.bindPopup

I have created a GeoJSON list and am trying to export it to file via a button in the webpage. Everything works fine except that the file that is exported only displays 'undefined' and none of the GeoJSON data. What am I doing wrong? HTML : <button onclick="exportToJsonFile()">Download GeoJSON</button> Script : var api = $.getJSON("https://api.data.gov.sg/v1/environment/rainfall?date=2019-07-03", function rainfall(data_rainfall){ apiGeo = { type: "FeatureCollection", features: []}; //---- apiGeo is populated here ----// console.log(apiGeo); //displays data in GeoJSON format in browser console }

I want to convert java List object into D3 GeoJSON . Is there any java api available that help to convert java object to GeoJSON object. I want to display graph in d3. Can anyone help me to solve this problem? GeoJSON is very simple; a general JSON library should be all you need. Here's how you could construct a list of Points using the json.org code ( http://json.org/java/ ): JSONObject featureCollection = new JSONObject(); try { featureCollection.put("type", "featureCollection"); JSONArray featureList = new JSONArray(); // iterate through your list for (ListElement obj : list) { // {

基于地理位置的应用越来越多，该功能可以查找距离当前位置最近的地点，例如美团、共享单车等。MongoDB为LBS应用提供了解决方案：基于2dSphere索引，我们可以基于该特性创建LBS应用。下面通过一个案例说明如何用mongoDB做位置搜索。 如下图所示。假设我们有以下的坐标点 A B C D E F G, 分别代表一些采集到地理位置的商店。那么，我们怎么才能获取到距离自己最近的商店呢？我们有一个集合是商店shop，分别保存了商店的名称和地理位置。 （1）创建商店的集合 db.createCollection("shop") （2）为字段位置location建立索引，类型：2dsphere db.shop.createIndex({"location":"2dsphere"}) （3）插入商店的测试数据 在前面我们为位置创建了2dsphere索引，这里需要插入的是GeoJson数据。GeoJson的格式是 { type: ‘GeoJSON type’ , coordinates: ‘coordinates’ } 其中type指的是类型，可以是Point(本例中用的)。除此之外，还有LineString，Polygon等类型，coordinates是一个坐标数组。 可以到官网 https://docs.mongodb.com/manual/reference/geojson/