An open geographic data format based off of JavaScript Object Notation

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67 views

How to remove all active layers or to know all active layers in leaflet?

I just need to know if there is any function which helps to return all active layers. basically, I need this function to remove all layers due to my ajax call. Here is my main function ... function ...
2
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1answer
63 views

How to unlock imported GeoJSON vector layer?

I have a map on geojson.io, with some fails that I need to correct. It has a feature to edit polygon's node but it's too tedious and hasn't "snapping" mode. So I've imported my .geoJSON, .shp, ...
0
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1answer
29 views

OpenLayers3/GEOJSON - Feature 'source'?

I'm fresh with OpenLayers/GEOJSON... Anyway,vector layer with features (lines, polygons..dots..) and it pulls those data from GEOJSON ("type":"FeatureCollection") file. Is there a way to see ...
0
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1answer
88 views

Paper PDF maps to geoJSON

Is there a way to do this? Maps with lat/lng can be analyzed in Acrobat with the analyze/geospatial tool. When a user clicks on the map, the lat/lng is returned. There has to be a way to grab these ...
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0answers
80 views

Leaflet filtering existing featuregroup

I have a leftleat map and i would like to filter the featuregroup i am displaying. exp_colJSON = new L.geoJson(exp_col,{ onEachFeature: pop_col, pointToLayer: function (feature, latlng) { ...
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88 views

Appropriate number decimals for storing 20m resolutuion US county data in GeoJSON

I took the 20M the 2013 census bureau data and converted it to GeoJSON. I also used this Ramer-Douglas-Peucker implementation to reduce the point count and therefore number of points with an epsilon ...
0
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2answers
247 views

How do I json_encode without those quotes for the coordinates in leaflet geojson polygon?

I have a field name: 'coordinates' I have the coordinates stored in there: like this: [[ [100.0, 0.0], [101.0, 0.0], [101.0, 1.0], [100.0, 1.0], [100.0, 0.0] ]] when I json_encode($geojson); I get ...
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43 views

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
99 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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0answers
59 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
72 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
412 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
82 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
50 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
252 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
votes
1answer
205 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
123 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
313 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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0answers
182 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
90 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
101 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
337 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
82 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
79 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
1k 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
62 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
63 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
119 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 ...
1
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2answers
57 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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146 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
134 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
178 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
166 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 ...
1
vote
1answer
78 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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0answers
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 ...
0
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1answer
46 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
73 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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0answers
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?
0
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1answer
217 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
54 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
216 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
101 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
votes
1answer
174 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
626 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
98 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
41 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 ...
1
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1answer
197 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
60 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)?