An open geographic data format based off of JavaScript Object Notation

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3
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1answer
304 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 ...
2
votes
1answer
36 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 ...
2
votes
1answer
323 views

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 ...
2
votes
1answer
266 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 ...
2
votes
1answer
114 views

how to see multiple features from GeoJSON

In Pablo's answer: Open a GeoJSON file with QGis He says he 'imported each type at a time'. How do you do that? I am working with a GeoJSON file that has a mixture of points and polygons, but points ...
1
vote
1answer
34 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 ...
1
vote
1answer
18 views

QGIS geojson vector layer

When I add vector layer to QGIS using geojson protocol, data form server are being displayed. Problem is that every change of map extent (pan, zoomIn, ZomOut) is causing request for same data again. ...
1
vote
1answer
47 views

How do I make my map use a set of coordinates

Right a little background. I've made a custom google map with the google map api which has a few functions that work well within it - one specifically is limiting the user on what they can view within ...
1
vote
1answer
86 views

Is there a way to have a choropleth map in Excel reading data from a sheet?

Is it possible to have a solution similar to ESRI maps for office in which I want basically a geojson file or any file for that matters to render a choropleth map based on data in a sheet? Tried ...
1
vote
1answer
60 views

Unable to save to in Geojson format with the correct projection

I have a shape file (Polygon) in Qgis that I wish to save in Geojson in order to display it with the mapbox javascript api. Original projection is in POSGAR 97 My issue is that it does not reproject ...
1
vote
1answer
156 views

SQL-query should return GeoJSON FeatureCollection

I'm trying to return a GeoJSON FeatureCollection object from a SQL-query with PostgreSQL 9.3 and PostGIS 2.1. This is my query so far: SELECT row_to_json(fc) AS p FROM (SELECT 'FeatureCollection' ...
1
vote
1answer
286 views

How to write GML and GeoJSON features while retaining attributes in .NET?

I am developing a .NET project [C#] that needs to export/write features as GML and GeoJSON, including, of course, the attributes; data could queried by a database or manually entered. I checked ...
0
votes
1answer
31 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 ] } }, ...
0
votes
1answer
41 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 ...
0
votes
1answer
18 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" ...
0
votes
1answer
22 views

GeoJSON: line connecting features

How do I create a line connecting Features in GeoJSON? I hope to avoid having to re-enter coordinates for the polylines I use to connect the Features separately...
0
votes
1answer
54 views

geoserver to leaflet via jsonp

Please somebody help because I am on the edge of madness:) I have no idea what is wrong with my code... Only what I want is adding layers to my leaflet map: 1 point layer, 1 line, and one polygon. ...
0
votes
1answer
118 views

How to query postgres with gis to get GeoJSON for GeoJSON tile layer?

I have a postgres database with one table like the following: CREATE TABLE post_pl ( gid serial NOT NULL, zip character varying(5), zip_n integer, city character varying(50), geom ...
0
votes
1answer
13 views

Guideline/scheme for naming properties in GeoJSON

Are there any guidelines/requirements for naming properties in GeoJSON? Should I add a vendor-prefix for my properties which only make in use with a specific application? I already read the ...
0
votes
1answer
70 views

TileMill OGR Plugin: Failed to read GeoJSON data

I'm trying to load the following into a TileMill layer as the file build1.geojson { "type": "Feature", "geometry": { "type": "Polygon", "coordinates": [[ ...
0
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0answers
6 views

Openlayer 3: geoJSON clustering failed

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 ...
0
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0answers
30 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: ...
0
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0answers
22 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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0answers
12 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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0answers
39 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 ...
0
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0answers
35 views

error converting shapefile to geoJSON with Ogre online tool

I am using on online tool built with ogr2ogr to convert shapefiles to geoJSON: http://ogre.adc4gis.com/ It's worked well except for one shapefile, and I can't see why... The shapefile has only six ...
0
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0answers
103 views

GeoJSON and php i cant visualy roads from postgres database

I am make a json file with geometry MultiLineString from the posgresql but when i try to load the file in map.data.loadGeoJsonis not visually the roads but if i take the link from google api example ...
0
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0answers
86 views

Get Linestring and Polygon into Leaflet from GeoServer

I can load points from my geoserver to leaflet via jsonp. Now I would like to know how can I load linestring or polygon with similar method into leaflet. Here is the example for points: var ...
0
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0answers
116 views

GeoJson layers with leaflet in IE8

I have built a website displaying a lot of line shapes, using geojson, on a leaflet map. This is working relatively well in most browsers, though speed could be improved. As usual IE8 is being the ...
0
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0answers
58 views

geojson object with different representations and label/popoup conten

I have a quite complex geojson in terms of vertexes. It holds all the information which is needed in the webmap. it serves as the input for many layers like this (example for two): var represenation1 ...
0
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0answers
72 views

How to hide overlays in Leaflet layerControl if geojson var not found?

i would like to perform a specific task: i have a set of geojson layers, loading features from local files. i have the layercontrol on the map showing available layers to show/hide now, regarding ...
0
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0answers
356 views

openlayers 3 geojson style

here's a part of my html/js file. I cant display my geojson and really dont know the reason why. debug only says : "TypeError: f is null" any1 help ? Thx var map = new ol.Map({ target :'map', layers: ...
0
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0answers
110 views

OpenLayers Vector Features with common properties in multiple Layers

I am trying to manage features across different layers. Features are displaying weather parameters at some points on the map. Hence there is a wind layer, a temperature layer, etc. which all are ...
0
votes
0answers
133 views

Geojson not rendered with Mapnik

I am trying to generate a tile with Mapnik with a GeoJSON. The stylesheet.xml with the part to render the GeoJSON is the following: <Style name="cities" filter-mode="first"> <Rule> ...
0
votes
0answers
44 views

How to serialize a HTML form to GeoJSON data?

I'm developing a Cordova/PhoneGap mobile application and using NodeJS for server and MongoDB as database. I need to serialize GPS data from mobile phone to send it to my webservice with latitude and ...
0
votes
0answers
86 views

Google Maps + Geojson vector layers --> Save as Image

I've created a custom website with Google Map's + geojson layers read from a Postgis database. I draw some other layers on top of it, including some polygon and line layers... I display this website ...
0
votes
0answers
64 views

OpenLayers GeoJson style

I have a GeoJson that I'm displaying in OpenLayers. I created a style map and added it to a layer. The problem is that in GeoJSON I have two types of features - Points and Linestring. And they both ...
0
votes
0answers
60 views

GeoJSON layer with local projection in Leaflet

I try to add a GeoJSON layer to my map in Lambert II projection. The GeoJSON contains few points. It don't work if the GeoJSON have more than 1 feature, but for 1 feature, it work ! I don't know why ...
0
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0answers
127 views

TileStache : Unknown geometry type in geoJSON file

I'm currently trying to set up a TilSstache server on Ubuntu 12.04 to serve some GeoJSON tiles from a shapefile/JSON file (administratives boundaries) for a web mapping project using the Leaflet ...
0
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0answers
245 views

Venue/Indoor Map using D3.js and Geojson

I have created geojson file which contains all the features of 1st floor of a shopping mall. I got that venue map projected using d3.js with different colors but only some parts not the complete map. ...
0
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0answers
375 views

Java + GMaps JSF + PostGis + JasonSanford / geojson-google-maps

Guys want to test how to plot lines and points in google maps using Java + JSF + PostGIS + GMaps JasonSanford / GeoJSON-google-maps. First have a spaceport in postgis with a table of rows and other ...
0
votes
0answers
22 views

From NBM to UWN

Okay, I'll start this off by saying that I'm not a GIS expert by any means. I'm also working with data and places that most people don't work with, but I'm hoping it can be boiled down to basics. I've ...
0
votes
0answers
632 views

D3.js with dynamic geojson data (SQL server/.NET)

I have a $.ajax function which returns the geojson data from the asp.net mvc server method. I want to know how I could send that as a parameter to d3.json() function. Better if anyone shared code ...
0
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0answers
313 views

D3.js with dynamic geojson data

I have a $.ajax function which returns the geojson data from the asp.net mvc server method. I want to know how I could send that as a parameter to d3.json() function. Better if anyone shared code ...
0
votes
0answers
353 views

Using Tile Mill and GeoJSON

I am trying to use Tile Mill and GeoJSON layers to have an image appear within a tooltip but it is not working properly. The process I go through to get the GeoJSON: 1) load .shp into QGIS 2) save ...
0
votes
0answers
255 views

Why do my maps exported in WGS84 have large coordinates?

I'm using QGIS to export map layers as GeoJSON for use in Leaflet. The map file CRS is WGS84(EPSG4326) and I'm exporting it as such. The issue is the exported coordinates are still too large: [ ...
0
votes
0answers
164 views

saveStrategy and OpenLayers

I am trying to apply code mainly from here http://maps.peterrobins.co.uk/files/ol6.html and create a custom "saving button". Problem is, that my json is loaded (from mysql db) to variable. (This time ...
0
votes
0answers
337 views

Continents geometry data / extracting contours of continents from country geometry

I have an ESRI Shapefile data from Natural Earth (Admin-0 Countries). I converted it to geoJSON format. There is no world or continents geometry there, only the county one. And I'd like to extract eg. ...
0
votes
0answers
171 views

Openlayer seems slow when zooming / panning on vector (geometry line) from geojson. Why?

I have a layer with 7 lines . when I zoom on some of the lines , the maps seems to be very slow. I thought it might be because I bring a lot of points to the client (that represents the line) aa ...
0
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0answers
92 views

Is there a big (if any) performance difference between Geoserver SQL Layer and OpenLayers geojson Layer?

I have a table with multiline geography items in SQL Server 2008 (Routes). I want to show them on OL Google Map but I'm having trouble creating SQL Data source in geoserver (something related to ...