An open geographic data format based off of JavaScript Object Notation

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Printing GeoJSON layer

I am trying to print a GeoJSON layer that I create myself programatically. The way that I am using is the following: var style = { externalGraphic: "images/drop.png", graphicOpacity: 1, ...
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1answer
94 views

export to GeoJSON coordinates in the reverse order

This question has been asked before, but I don't understand how to use the answer given by cengel. I want to make a GeoJSON file with lat long coords, not the default of long lat coords. I have a ...
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54 views

ogr2ogr in java gdal

I would like to code ogr2ogr -f "GeoJSON" destination.geojson source.geojson -s_srs EPSG:3068 -t_srs EPSG:4326 in java-gdal. I tried to understand how it should work by looking at this example but ...
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2answers
70 views

Is it possible to read geojson geometry from ArcGIS Javascript API?

I'd like to know if it is possible to read geojson geometries using the ArcGIS Javascript Api.
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2answers
382 views

Openlayer 3: geoJSON feature clustering

Ive been trying to use the basic example from openlayer website to create a simple clustering map for my geoJSON data. However, Im not getting any luck to generate any clusters. Below is my code, many ...
2
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0answers
81 views

How to get Geography data to GeoJSON in PostgreSQL?

I am using PostgreSQL database and there is a field in a table(area), i.e., public.geography(Points,4326). It contains below type of records "0101000020E6100000BA83D89942334540780B24287ED051C0" I ...
2
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1answer
49 views

Remove null attributes from GeoJSON

I used the following command to reproject a GeoJSON from lat/lon to 3857: ogr2ogr -f "GeoJSON" results_3857.json -t_srs "EPSG:3857" results.json Unexpectedly, the resulting file was 5 times larger ...
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4answers
235 views

Where could I find geojson data for all counties of the UK

I'm having a look at http://code.highcharts.com/mapdata/countries/gb/gb-all.js However I'm having trouble identifing a list of counties from this geojson data. I've managed to get a rough list by ...
2
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1answer
188 views

Leaflet Marker Mouseover Popup

I've tried to make a MouseOver Markers Popup since a couple of days, I'm using Leaflet. I know some solutions I've read in many forums, but I wanna make it work with GeoJSON-Points and I haven't found ...
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0answers
27 views

combine multiple geojsons

I have several geojsons which contain polygons. But the polygons are reaching over other geojsons. When I import them into lets say Qgis, the polygons, which are distributed among several geojsons are ...
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1answer
113 views

Openlayers: select a feature programmatically from GeoJson

I am working on a project that uses openlayers (version2.14)to display a Bing layer(GeoJSON format), I have no problem reading the GeoJSON and display features, but I want to select a feature ...
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3answers
300 views

How to load geojson vector tiles from mapbox id?

I have some data hosted on mapbox and I'm trying to load it as tiled geojson into Leaflet from its mapbox id (I just want to get plain geojson, I'm not trying to render it). How can I achieved that? ...
2
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170 views

How to load GeoJSON into PostgreSQL database using Python?

What I have tried to do is (In Python IDLE): import psycopg2 import json try: conn = psycopg2.connect("dbname='carto' user='postgres' host= localhost password='password'") except: print "I am ...
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1answer
84 views

PostGis - BBox -vs- ST_intersects Queries

CartoDb Recommend here that the following query is faster than an St_intersects Query SELECT * FROM {table_name} WHERE the_geom && ST_SetSRID(ST_MakeBox2D(ST_Point(-73.9980, 40.726), ...
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1answer
98 views

CartoCSS Expression for shield-name

Is there any way to use a regular expression to filter a string when using CartoCSS expressions? I have geojson of some ways and route relations I obtained using Overpass Turbo. When creating a new ...
0
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1answer
300 views

Adding drop-down menu on leaflet map instead of L.control

I have created a choropleth map including several layers from the same geojson layer which is turkeyData in my case.I actually did it and it works fine. But I like to change the standart leaflet ...
1
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1answer
76 views

Write GeoJson into a .geojson file with Python

I want to write a geosjon object with the type <class 'geojson.feature.Feature'> into a .geosjon file. Therefore I tried to use with open(test.geosjon, 'w') as outfile: ...
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1answer
71 views

ogr2ogr: don't import properties on each feature?

I have a 2MB shapefile that when converted to GeoJSON becomes 10MB: $ ogr2ogr -f "GeoJSON" -t_srs EPSG:900913 landfill.geojson Authorised_Landfill_Sites_010k.shp I can reduce the size of the ...
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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?
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1answer
60 views

Export KML from GeoJSON in QGIS and coordinates change?

I'm very new in this area. I have a geojson vector layer file, with coordinates like { "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 487677.2993499999866, 112018.26101 ] } }, ...
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1answer
62 views

PostGIS returning a field one level higher in the Json

I have the following SQL on a PostGIS Database ($properties contains a list of fields, including osm_id) SELECT row_to_json(fc) FROM ( SELECT 'FeatureCollection' As type, ...
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0answers
117 views

Saving data in OL3

I have a small app where I would like to be able to digitize new features and save them for use outside the app. I am using geojson as I don't have a geoserver I have managed to create a button that ...
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2answers
55 views

Most efficient method to get national-level data displayed with Leaflet

I'm looking for the most efficient way to get a national or U.S. and Canada level dataset working with a JS mapping library. My problem is there's a myriad of technologies that seem like they can ...
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0answers
136 views

OL3 error with Style function

I am trying to style a .json layer with a numbe of classes based on an attribute. I and getting the error below which is apparently in ol3.js based on debugging in chrome: Uncaught TypeError: ...
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1answer
122 views

Difference between TileStache and Geoserver?

I have troubles to understand the differences between TileStache and Geoserver. My goal is to serve tiled geoJson through a restFull API and consume it with Leafet. Which one is the best for this ...
3
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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
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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 ...
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1answer
67 views

How to add GeoJSON layer with GraphHopper?

I have a GeoJSON file containing some POI that I would like to be able to display within a separate layer with GraphHopper. But after several tries and search over internet, i can't manage to get a ...
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28 views

increase gdal_polygonize's capacity

I have a very big PNG (82500x40900) with more than 5000 polygons. I want to use gdal_polygonize but the geojson output shows that gdal_polygonizer stopped after 4770 polygons and the geojson isn't ...
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1answer
44 views

Is gdal_polygonizer creating a wrong geojson?

I have this PNG and I use gdal_polygonize 0VxOhek.png -f "geojson" 0VxOhek.geojson This is the output. There is a "features"-array which contains many objects with "type", "properties" and "geometry" ...
2
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2answers
72 views

How to encode a point geometry in Geojson?

I have point geometry in posgresql which I query as follows: select ST_AsText(geom) as pointgeom from pointable. I'm using python as server side script. I want to pass the result as Geojson response ...
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14 views

Deviated InfoBox - Geojson

I tried to showing info-Box after click (onmouseclick), that is goes well but info-Box's location is far away from my geojson area. Can Someone explain to me what happen in here?
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1answer
209 views

Add 'name' from GeoJSON to Leaflet List Markers control

Im my web app I use Leaflet List Markers plugin (https://github.com/stefanocudini/leaflet-list-markers). Markers loaded as GeoJSON from GeoServer. I want dispaly name of markers in list control, but ...
2
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2answers
51 views

Coordinate Not Match - Convert Shapefile to Geojson

I'm a newbie at GIS programming and I have a problem with file conversion. I've tried to convert shp file to geojson, and the coordinates do not match. But when I try to convert it to kml, it goes ...
1
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1answer
197 views

Leaflet interactive styling does not reset style correctly on mexican state geojson layer

I adapted the leaflet tutorial for an interactive choropleth map to create hover highlights and zoom functionality to my Mexican states map. Oddly, when I test out the highlight it leaves certain ...
0
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1answer
97 views

Open Layers 3 geoJSON not loading

I am having trouble loading a geoJSON layer (below is my defintion). everything works fine when I read the file locally in a web browser e.g. file:///Z:/inetpub/wwwroot/bang.html however when I try to ...
3
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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 ...
1
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1answer
46 views

Layer toggle disappears leaflet

I'm having a bit of trouble finalizing a project I'm working on. When I upload my map to filezilla, my map layer toggle doesn't show up: before uploaded: after uploaded: Does anyone have any idea ...
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2answers
600 views

OL3 Style function

I am attempting to write a style function within an open layers 3 application that will change the fill color of a circle based on an attribute from a geoJSON piece of data. I have looked over stack ...
5
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2answers
94 views

Access geojson from github in leaflet

I am new to json, github, and leaflet. But I am trying to create a simple application which will render my points which are in geojson up on github. From everything I have read this should work. ...
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0answers
39 views

OpenLayers 2: Transform the geometries for a list of feature objects

I am trying to export GeoJSON for a list of feature objects. The features are in EPSG:3857 projection and I would like to convert all geometries to EPSG:4326. I am perfectly capable of doing this by ...
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1answer
195 views

Geoserver WFS GeoJSON layer in Leaflet, having trouble diagnosing 'Uncaught TypeError: undefined is not a function (Anonymous Function)' error

Pardon me if this has been addressed, I searched as far as I could for similar errors. I'm trying to serve a large amount of polyline data as a geoJSON layer from GeoServer to a Leaflet instance. ...
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0answers
59 views

GeoJSON to routing graph

What are the best automated ways of placing the nodes and edges of a routing graph using the GeoJSON data of a multi-level building? What other data is needed (area layout, accessor directions etc)?
2
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1answer
88 views

OL3 - Y Axis inverted

I have a custom map, served by our custom internal map server (XYZ) showing up in OL3. This works perfectly, but now I have to put some vector shapes over the top, these shapes are coming from an SVG. ...
2
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2answers
217 views

What's the best way to determine if a point is within a certain distance of a GEOJSON polygon?

What's the best way to determine if a point is within a certain distance of a GEOJSON polygon? Should one use TurfJS buffer method (https://github.com/Turfjs/turf-buffer#turf-buffer)? Can one perform ...
0
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1answer
846 views

D3.js cannot render my geoJSON file

I've been trying to draw maps using the d3.js library in a manner similar to that below. <script> //Width and height var w = 500; var h = 300; //Define path ...
2
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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 ...
1
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1answer
305 views

shapefile for mumbai area or section wise

I am working on a project in which i need to plot data on Mumbai city map section wise or area wise but i am not able to get Shapefile for the same. Can anyone please provide me the link where i can ...
0
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1answer
31 views

How to plot a Start and Stop point while drawing a line in CartoDB?

My visualization plots a bunch of lines on a map using CartoDB using a Start coordinate and a Stop coordinate. My data contains geojson formatted coordinates (for each row) I want to show a "Start" ...
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0answers
91 views

Why can't gdal save CRS information to GeoJSON?

gdal fails to add CRS definitions to GeoJSON files in some cases. Try this, for example, from any linux terminal that has gdal installed: # download the data wget ...