An open geographic data format based off of JavaScript Object Notation

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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
1answer
9k views

How can I change the style of marker in leaflet (from GeoJSON)?

I'm serving GeoJSON to leaflet and by default it get a blue icon marker. I'm trying to change the style so I'll be able to use the feature properties as part of the style , but no matter what I do , ...
3
votes
3answers
589 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
2answers
744 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
1answer
896 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
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
320 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
820 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
565 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
1k 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
1answer
5k views

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 ...
3
votes
2answers
131 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
97 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
1k 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
2k 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
999 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
65 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
163 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
168 views

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 ...
3
votes
1answer
144 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
178 views

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 ...
3
votes
1answer
1k 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
2answers
170 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
623 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
175 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
79 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
676 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
79 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
348 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
1answer
248 views

Why is the exterior shell of this GeoJSON invalid?

I got some data from Zillow's neighborhood database as shapefiles and converted them to GeoJSON. However, some of the objects appear to be malformed when inserting them into MongoDb. Is there ...
3
votes
3answers
336 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, ...
3
votes
5answers
641 views

How can I count overlapping polygons, resulting in a new set of polygons?

I have 100 polygons in a GeoJSON file that partially overlap each other. I would like to produce 100 new polygons as follows: The area covered by any of the original 100. This is their union. The ...
3
votes
1answer
1k views

display a choropleth map using D3 and Leaftlet

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 ...
3
votes
1answer
553 views

ogr2ogr from Postgres to GeoJSON missing crs key

I'm using ogr2ogr to convert some OSM data for Greenland (not really important for the question), from a PostGIS database to a file containing GeoJSON. The problem is that the GeoJSON gets written ...
3
votes
1answer
3k views

How do you put GeoJSON attribute information in a popup with OpenLayers

I am having some trouble putting GeoJSON attribute information in a pop-up. The selection control is working, and I create an alert (for testing) and this is working. But I can't figure out how you ...
3
votes
0answers
681 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 ...
3
votes
0answers
1k views

How can a leaflet SVG overlay be placed outside of the leaflet-overlay-pane?

I have SVG on top of GeoJSON in my map. How can a leaflet SVG overlay be placed outside of the leaflet-overlay-pane while keeping GeoJSON in place in the leaflet-overlay-pane? (For example, how could ...
3
votes
0answers
51 views

simple raster format to use in Web applications?

I'm building a Web application in which users create and edit very coarse raster data. They're assigning values to cells in a georeferenced grid. Right now I'm storing the values in a multidimensional ...
3
votes
1answer
371 views

leaflet geojson contextmenu

I want to add a context menu on right click for various elements on my geojson layer (I'm doing a road map so on a right click on the road at any part I want to show the context menu). I've managed ...
3
votes
0answers
189 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
0answers
139 views

GeoJSON support in ArcObjects 10 .NET

i am currently trying to build a geoprocessing application using OpenLayers and ArcObjects, I have some features that user draws on openlayers and i need to send these features to arcobjects for ...
2
votes
4answers
4k views

How to convert SHP into GPX or JSON?

I would like to convert the tree inventory shape files of London (Canada) into a GPX file and if possible into a JSON file. You can download the archive from their Open Data website. It contains the ...
2
votes
2answers
178 views

How to export thousands of features from PostGIS to a single GeoJSON file?

I know how to export one feature from a PostGIS database using ogr2ogr: $ogr2ogr -f GeoJSON out.json "PG:host=localhost dbname=xxx user=xxx password=xxx" -sql 'select id, county, wkb_geometry from ...
2
votes
3answers
140 views

FME and elasticsearch

We are developing a system to disseminate information about roadkills. The source data comes from three different databases. We have set up a FME project which pulls geojson from the source databases, ...
2
votes
5answers
124 views

What are some ways to convert a csv file to geojson while preserving data types?

Assuming said csv file is properly structured with Latitude and Longitude. I'm having problems find converters that won't mess up the data types (putting string around integers).
2
votes
2answers
768 views

Add GeoJSON layer to OpenLayers 3

I have a GeoJSON file called mygeojson.json and I want to add it as a layer in OpenLayers 3 on top of an openstreetmap layer. So far I could display the openstreetmap world including zoom etc. but for ...
2
votes
2answers
969 views

GeoJSON java library

I am creating a Java web service that receives GeoJSON. Does anyone know a java library to manage GeoJSON?
2
votes
3answers
55 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 ...
2
votes
2answers
921 views

How to project a geoJSON file in OpenLayers?

I have a json file well formed. I want to read a json file as a base layer from OpenLayers. <script type="text/javascript"> var styles = new OpenLayers.StyleMap({ ...