GeoJSON is a geospatial data interchange format based on JavaScript Object Notation (JSON)

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Exporting Arcgis Online content as georss or geojson? [duplicate]

There are number of sites talking about how to add a georss feed to an ArcGIS Online map (see silverlight and flex examples from esri_webapi), but I haven't located anything about exporting a georss ...
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Working examples of Leaflet/Polymaps with GeoJSON tiles generated from Tilestache using Shapefiles?

I'm looking to create choropleths using GeoJSON tiles generated from ESRI Shapefiles by TileStache(or similar), in either Leaflet or Polymaps. So far reading and drawing GeoJSON from both Leaflet and ...
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Why are GeoJSON coordinates different exported from QGIS vs. ogr2ogr?

I have a shapefile with a Google Mercator projection (900913) that I need converted to GeoJSON. I need to do this on a regular basis amongst other things so I wrote a shell script to do it using ...
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Transform GeoJSON geometry to WKB

I need transform geometry from JSON like: {"type":"MultiPolygon","coordinates":[[[[-125045.48351212002,4577567.588141698],[-124816.19981552364,4577552.93014355],[-124765.99472517562,4577419.175847012]...
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Can ArcPy's AsShape be used with GeoJSON FeatureCollection of Polygons with Labels?

The AsShape documentation provides examples that work very well. However, I have been given what I believe to be valid GeoJSON that is a FeatureCollection of two polygons each with a Label. It ...
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Problem with loading GeoJSON file in OpenLayers generated by PHP

I'm trying to read some geo-data from PostGIS database using PHP, creating a GeoJSON file and showing it on a base map using OpenLayers. The PHP code works just fine. The generated data in GeoJSON ...
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How to merge TopoJSON features?

I currently have a coordinate based map of the US and it's states for topojson (https://github.com/mbostock/topojson). The coordinates are a JSON array (as topojson works), data looks like this: [-...
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How to add a polygon from PostGIS ST_AsGeoJSON into Leaflet?

I try to use the following function to add polygons to my Leaflet map. function polygon(geojson) { alert(geojson); // alert for testing layer = L.geoJson(geojson); layer.addTo(map); } ...
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Is there an XML equivalent to GeoJSON?

In my web application, I am retrieving geospatial data from a server backend (Java) to the browser frontend (JavaScript). I am considering two options of how to serialize the data in this ...
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Converting multilayer KML files to GeoJSON using ogr2ogr

I have a kml file that I'm trying to convert to GeoJSON. However, it turns out there's multiple layers, and ogr2ogr isn't happy. $ ogr2ogr -f GeoJSON shapes.json shapes.kml ERROR 6: GeoJSON driver ...
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MySQL to GeoJSON - Formatting Issue

I'm trying to make a select on a mysql table and then write it out to a geojson file. I'm getting close but there are a few issues. Here's what I have so far: <?php require("dbinfo.php"); // ...
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Loading GeoJSON into QGIS

I am a beginner with QGIS. I am trying to learn it through lynda.com. I have tried downloading the nanaimo crime map in GeoJSON format, but I get a message saying that the data source is invalid. I ...
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Invalid GeoJSON when inserting data to a CartoDB (PostGIS) table from Leaflet

I've been following along to this tutorial from CartoDB. I create the GeoJSON using: var drawing = "'"+JSON.stringify(layer.toGeoJSON())+"'"; and then inserting using a custom SQL function ...
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Display GeoJSON layer on top a SVG image instead of a map.

I'm very new to GIS, so hope this is the correct place to ask. Not sure if this will even be possible. This is what I want to achieve: In short, I want to display a set of polygons, lines etc. in a ...
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Attribute editing in QGIS on geoJson file

We have vector files in the format of geoJson files. We need to keep it in geoJson format as it is picked up by mobile devices via Restful services. The problem is we want to change the attributes of ...
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How to avoid corrupt geometries when translating between TopoJSON and GeoJSON?

I'm trying to display some geojson vector features on a leaflet map. The size of my GeoJSON is too big (25.4mb of data, 8.47mb gzipped), so I'm trying to use a TopoJSON format to reduce the size ...
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Reproject GeoJSON in OpenLayers 3

I'm basically trying (and failing) to replicate this in OpenLayers 3. I've set up a fiddle here: http://jsfiddle.net/vu8ecy8v/5/ I'm under the impression that OpenLayers will reproject a GeoJSON ...
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ogr2ogr : Converting KML to GeoJson

I have a requirement to convert .KML file to GeoJSON or JSON. Can you please recommend open source command line tools on GNU/Linux(2.6.32-358.14.1.el6.x86_64)? I have installed gdal, when I run.. ...
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How to load big geo-data file into web application

I am building a web app where I show details in map. I load data using geojson file (190 mb). I was looking in different possibilities to show the data, here there are: Leaflet GeoJSon: it should ...
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converting/parsing geojson into com.vividsolutions.jts geometry

Does any has any experience with converting string geojson into com.vividsolutions.jts geometry object (point, polygon, etc). Maybe there is some java library I cannot find. Greets!
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How to properly convert landmass NaturalEarth data into GeoJSON?

100% Newbie. I've been following Mike's d3 Map Tutorial and I've come up against a challenge. I guess my question essentially boils down to: how does one generate the proper GeoJSON/TopoJSON files ...
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How to label GeoJSON polygons?

I'm using Leaflet combined with GeoJSON features. Is there a way to label GeoJSON features (in this case - polygons)? It should get labels from feature.properties.name This is my code where I ...
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Where can I find GeoJSON resources files?

I'm looking for demographic information and various things, and most of the time data are available as CSV (my application use geoJSON format). Shall I encode the CSV to geoJSON or is there a "...
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Beginner needs suggestions on map clicks and geojson

I'm a beginner with programming, and javascript. I went to the FOSS4G-NA conference and was very inspired to learn more. I'm trying to learn PostGIS, and have come across a very useful tutorial for ...
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Day and night zone layer for Leaflet

I'm working with Leaflet and I'd like to show the day and night zones adding a dynamic layer to my map. I was thinking to add a static layer with some transparency and make it move every x minutes but ...
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What is generally faster in OpenLayers: WMS or GeoJSON?

I work both with WMS (connection with postgres) and GeoJSON in OpenLayers. I have the impression that a WMS is faster when more feature need to be loaded. And I have the impression that GeoJSON is ...
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Using QGIS, how can I add a bounding box attribute?

I have a shapefile where I am exporting the features to GeoJSON objects with ogr2ogr based on a simple where clause. One thing that I would like to be included in the GeoJSON object is the 'bbox' ...
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GeoJSON/GeoCouch questions from a newb [duplicate]

I am new to JSON and GeoJSON and would like to start to use this but I am a little confused about some things. Perhaps you can help me out: 1) Is there a GeoJSON validator out there? 2) Is the text ...
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Split very large OSM file

I'm trying to get detailed geojson data for various African countries. I think I found a good source at http://download.geofabrik.de/. The problem is that the downloaded file is in osm format. I know ...
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Big data sets and challenges using the Leaflet client

I am using Leaflet to present around 90.000 data points. My test code is generated using the plugin QGIS2leaf in QGIS 10.10.1. I am using clustering and reviewing the code I can see that this is "...
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Methods for importing GeoJSON feature collection into ArcMap?

I have a GeoJSON file containing a feature collection, with the structure/format validated by http://geojsonlint.com/. What do people recommend as the best way to import this into ArcMap? I have ...
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How do I get GeoJSON data from GeoServer into show up on my Leaflet map?

I'm trying to create a simple "Green" map for my city. The idea being that it is a website with a map and layers you can turn on and off. I am serving the data through GeoServer and am using GeoJOSN ...
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103 views

leaflet GeoJson vs polyline

Is there any real advantage in using L.GeoJson instead of Polyline when drawing paths in a map powered by Leaflet? I know that GeoJson can attach additional options. It is also possible with ...
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How to encrypt vector tiles JSON response

I am using TileStache to serve vector tiles from Postgres and using Tangram to display these tiles by passing urlhttp://localhost:8080/composite/{z}/{x}/{y}.json in the data source. The response i get ...
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Truly lossless TopoJSON / keep all coordinates in TopoJSON

I'm displaying GPX traces on a Leaflet map. I'm using TopoJSON to drastically reduce file size, which works pretty well. My problem is the following : I want to be able to display altitude and ...
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Which plugin can draw topoJson right within Leaflet without conversion?

I already have asked how to reduce file size and increase performance for publishing spatial data on the web using Leaflet, here. A conversion to TopoJSON has reduced the file size by approximately ...
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Creating proper GeoJSON from PostGIS data using node.js

I am trying to build a GeoJSON object from a SQL query to some GIS point data in a postgis postgresql database. A snippet of my node.js app.js is below. As it stands I understand building the type ...
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d3 + Leaflet apply class value from geojson data

I have a geojson file that I'l able to draw just fine with D3 + Leaflet. I'm having trouble applying a class to the svg objects with a value from the geojson file. Each feature in the geojson file has ...
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Leaflet: Change point icon (geoJSON) on click and change back when clicking another point

I would be very grateful if someone could help me with this. I have a geoJSON (10 points) that is drawn using an icon. I want to change the icon when I click on one of the points and then I want to ...
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What is the best or recommended way to store a GeoJSON FeatureCollection in MongoDB?

The comments in this question: Shapefile to GeoJson conversion using C# raised another one: what is the best way to store a GeoJSON FeatureCollection in MongoDB? Is there any sort of convention when ...
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Leaflet geoJson in front of markers in a FeatureGroup

I am loading some markers and json data to a leaflet map. I need to get my json in front of the markers. I have tried placing the markers and json in seperate FeatureGroups and then tried ...
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Consume geojson web service in ArcMap

I need to consume data from a REST endpoint that returns features in geojson format within a model in ArcGIS 10.2. Is there a way to access a URL instead of opening a file? If there is no way to ...
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Find all street names or addresses within a polygon

I have a geojson list of lat/long coordinates that make up a custom polygon of a section of my county. Ideally I would like to be able to find all the addresses that are within the polygon boundaries. ...
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How to get data from TileMill tileLayer properties in Mapbox for click/hover

I've successfully used Leaflet to load a geoJSON polygon-shapefile with data, and added click and hover interactivity to the layer. For a large dataset, I switched to mapbox.js 1.6.1, used TileMill to ...
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Geotools: Efficiently writing a GeoJSON stream into a Shapefile

I've been trying a few solutions to efficiently convert GeoJSON into a shapefile without having to store all features in memory. I'm using GeoTools 9.2. The problem is not so much in how to stream ...
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display a choropleth map using D3 and Leaflet

I am trying to get a leaflet map to display a choropleth map using d3. I have written this code using samples I have found however the map just displays as the black fill, not the color classes I ...
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binding nested arrays as geojson popups in leaflet

I am struggling with geojson popups in leaflet.js I have nested arrays as properties for my features - an example would be counts of fish caught at a location (not my actual project data!) {"type":"...
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How to add a geoJSON layer to leaflet map?

i am newbie in leaflet & its geojson features... I am trying to test leaflet's functionalities. In fact i have built a map and its layer: var map = new L.map('map', {scrollWheelZoom:true, ...
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Offline Phonegap/Openlayers App

I have a mobile app that uses Phonegap with OpenLayers and Geoserver. Now, I need to make the app available completely offline. The amount of data points can get very large depending on what client is ...
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How do I clip Geojson FeatureCollection with another Geojson polygon

I have a GeoJSON file that contains one FeatureCollection with a bunch of features that are polygons. I also have the boundary of the continental USA in another GeoJSON file. I'd like to clip the ...