An open geographic data format based off of JavaScript Object Notation

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4
votes
1answer
921 views

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 ...
4
votes
2answers
942 views

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!) ...
4
votes
1answer
3k views

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, ...
4
votes
0answers
47 views

Describing borehole information with geojson (javascript)

I deal a lot with borehole information and looking the best way to move it around in javascript / take advantage of javascript libraries (e.g. leaflet) for looking at this information on mobile ...
4
votes
0answers
950 views

How to correctly import GeoJSON in PostGIS? [closed]

I'm trying to migrate GeoJSON data to PostGIS database and I thought that ogr2ogr is the tool: ogr2ogr -f PostgreSQL PG:"host={} user={} port={} dbname={} password={}" test.geojson -nln ogr_test ...
4
votes
2answers
950 views

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 ...
4
votes
0answers
228 views

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 ...
3
votes
5answers
769 views

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 ...
3
votes
2answers
208 views

How to determine number of features in GeoJSON file using Python or JavaScript?

Is there a best way to determine the number of features in a GeoJSON file? Ideally using Python or JavaScript.
3
votes
2answers
820 views

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 ...
3
votes
3answers
97 views

GeoJSON Rendering in Leaflet

I have published a wms using the QGIS Cloud and on top of it I am overlaying the same data (countries of Europe), using GeoJSON. Have a look at an example here: http://jsfiddle.net/j21kh7ao/ At a low ...
3
votes
3answers
2k views

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); } ...
3
votes
1answer
1k views

ogr2ogr specify lat/long order on conversion to GeoJSON

When using ogr2ogr to convert a polyon from a .shp file to GeoJSON, I noticed that it writes the coordinates in order lat, long. I noticed this because whenever I tried to view the GeoJSON on a map, ...
3
votes
3answers
654 views

Is it possible to check incoming GeoJSON to see if any of the features are identical to existing ones before adding to map?

I am working on a Rails/PostGIS app and doing a typical ajax call to retrieve GeoJSON within the map viewport bounds. Whenever the map is shifted or zoomed all of the markers are removed and then ...
3
votes
1answer
952 views

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 ...
3
votes
2answers
4k views

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 ...
3
votes
2answers
821 views

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 ...
3
votes
1answer
980 views

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 ...
3
votes
2answers
855 views

GeoJSON formatting for Leaflet

I am using http://GeoJSON.io as the source for my data, which is then to be displayed via Leaflet.js. I found that leaflet neads the file to include "var name = {" but GeoJSON.io doesn't like it, ...
3
votes
3answers
1k views

Definitions and limitations of MapInfo TAB file objects

I am working on a MapInfo plugin to convert MapInfo files to GeoJSON files. I am having trouble matching up the object types of the two formats. Each GeoJSON object type is described in the ...
3
votes
1answer
47 views

How do I produce a GeoJSON with 1 point at a certain lon/lat?

I need to create a GeoJSON string, which contains exactly one point at lon/lat 132.159633, 43.350116. I'm trying to use GeoTools 12-RC1 for that. Let's say I have following method, which is supposed ...
3
votes
2answers
309 views

Error inserting GeoJSON in PostGIS

I know there is a similar question but I am getting a different error and none of those answers have helped. I am trying the following query (the GeoJSON itself is from the PostGIS website. INSERT ...
3
votes
1answer
2k views

ogr2ogr : Converting KML to GeoJson

I have a requirement convert .HML 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, I am getting beloow ...
3
votes
1answer
2k views

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!
3
votes
1answer
404 views

Serialize python list containing geometry

In simple case if list doesn't contains geometry all works fine: result = [dict(f.fields, id=f.id, label=f.label) for f in features] json.dumps(result) But if result list contains geometry ...
3
votes
1answer
2k views

My GeoJson will not display on a Vector Layer in Openlayers

I have geoJson from the the USGS that I am downloading to my server. It validates just fine with geojsonlint. When I past the JSON into this Openlayers example it says it is bad input json. My Code ...
3
votes
3answers
918 views

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 ...
3
votes
1answer
623 views

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 ...
3
votes
2answers
2k views

Getting json feature id on OpenLayers

I'm projecting some features using json format on OpenLayers. I need to get the id from the feature (not the OpenLayers' id but the one in the json file). The file looks something like this. ...
3
votes
2answers
254 views

Read (GEO)JSON file from web service using FME Desktop

I have a webmap of bike stations and there is a json service for these stations behind the map. It is possible to provide this URL as the source dataset, using FME Desktop? Does FME Desktop support ...
3
votes
1answer
683 views

Ol3 displaying a vector layer

I have GeoJson that happily displays on GeoJson.IO that I am trying to display on a Vector Layer on an Open Layers 3 Map. The GeoJSON is in EPSG:4326, the Map is in EPSG:3857. My Code is: view = ...
3
votes
1answer
109 views

ogr2gui geojson to csv do not export coordinates

I tried to convert ogr2gui to convert geojson files to csv. The geojson file contains point data only. The resulting csv only contains attribute data, no coordinates. Is there a way to get the ...
3
votes
1answer
2k views

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 ...
3
votes
1answer
879 views

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 ...
3
votes
1answer
3k views

OpenLayers & GeoJSON files

After some hunting, it seems that if I have an a geojson file, I NEED the data and map to be on a server in order to view this in OpenLayers because of the protocol class. I saw an example where I can ...
3
votes
1answer
1k views

OpenLayers GeoJSON Data Store

Background: I have a single geoJSON data object that backs multiple Vector Layers of its features. I do this because the feature data has many attributes and can be presented in many different ways, ...
3
votes
1answer
84 views

Is there a way to reduce tile processing from Openlayers 3 when user pan & zoom a lot?

I have 2 overlays with local tiles (xyz) on my map. When the user zoom in / out and pan the map intentionally a lot, the app becomes very slow because OL tries to render all the tiles it was requested ...
3
votes
1answer
80 views

ST_GeomFromGeoJSON strips coordinates, is it a bug?

I'm storing some geo paths in PostGIS using GeoJSON and the ST_GeomFromGeoJSON()-function but I just found an issue with it: SELECT ...
3
votes
1answer
201 views

Put LeafletJS geoJSON's into a MySQL database through PHP

I'm doing a project that will let users manipulate a map through LeafletJS, creating circles and polygons on top of the map. I need to gather these inputs for later analysis, using a MySQL database ...
3
votes
1answer
174 views

Lambert_Conformal_Conic: converting from shapefile to geojson fails

I have a shapefile that also contains a proj file that looks like so: PROJCS [ "MGI_Austria_Lambert", GEOGCS [ "GCS_MGI", DATUM [ "D_MGI", ...
3
votes
1answer
1k views

Geoserver WFS - Can I Pass in Filter Parameters via the URL?

I'm trying to use PHP's CURL function to fetch geoJSON information from a GeoServer instance. I'm doing this using url variables rather than trying to construct a full xml GetFeature request. ...
3
votes
2answers
186 views

Performance loss for OpenLayers EPSG transformation? Storing GeoJSON coordinates in lat/lon or in native map projection?

For a project the map projection is EPSG:32468 (tiles). On top of the map, two or three GeoJSON LineStrings should be displayed using OpenLayers. Each LineString has about 1500 coordinates. ...
3
votes
1answer
676 views

Change Layer name when converting from GeoJSON

I am converting GeoJSON files to other formats (including KML) using ogr2ogr. As you may know, there is no field in a GeoJSON file to specify the name of the layer, causing every conversion to have ...
3
votes
1answer
44 views

Leaflet + GeoJson = problem with style

I got my first leaflet + geojson project partly working! (even the popup with content from the geojson file!) but I still have a problem with style the geojson (export from mapbox) file has point, ...
3
votes
1answer
212 views

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 ...
3
votes
1answer
95 views

Troubleshooting with Tiger for d3 — is this the wrong projection? Why's it look like this?

UPDATE: Solved, sort of … I downloaded the file afresh and tried feeding it through ogr2ogr and topojson again … and wouldn't you know … after a while it worked. I think I was possibly not setting an ...
3
votes
2answers
941 views

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 ...
3
votes
1answer
83 views

Rounding bug using ST_GeomFromGeojson()

Let's say I have the following geographical point represented in GeoJSON: {"type":"Point","coordinates":[-109.0,35.292506]} When I run the following conversion, things work as expected: SELECT ...
3
votes
1answer
426 views

Folium GeoJSON Overlay Not Appearing

I am in the midst of a task which involves the clustering of assessment neighborhoods into larger neighborhoods (data link). The goal is build these neighborhoods in a manner consistent with major ...
3
votes
3answers
382 views

Extracting Earthquake Depth from the USGS GeoJson Earthquake Feed for use with Openlayers

I have some GeoJson from the USGS as follows: {"type":"Feature","properties":{"mag":4.3,"place":"30km ESE of Jarm, ...