An open geographic data format based off of JavaScript Object Notation

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4
votes
2answers
897 views

How can we generate GeoJSON from SQL data with latlong

Is there any way we can create GeoJSON from SQL server table with Latitude & Longitude Data?
1
vote
1answer
138 views

Create shapefile based on geojson data with geotools (Java)

I'm using Geotools 14.0 for Java and I'm trying to generate shapefile based on data from GeoJSON. Here is my code: try { String url = "geojson.json"; File geojson = new File(url); ...
1
vote
1answer
167 views

Openlayers 3.5.0: Problems with GeoJSON in IE11

I seem to have a problem with loading a geojson-file as source for a layer in IE11 using openlayers 3.5.0. IE11 throws an error without any description. The problem seems to occur when the geojson is ...
0
votes
0answers
32 views

Add vector icons and popups in openlayers 3.11

here's what I am working on: http://environmentalobservatory.net/Calumet/3scale.html It works great so far and now I want to put icons, or what we used to call "markers" on it. But I can't find any ...
3
votes
2answers
45 views

Is GeoJSON an OGC format

I am using geometries in a JavaScript page and it is best to use JSON objects rather than GML which is XML based. I heard of GeoJSON, but is it an OGC open format?
2
votes
1answer
339 views

Routing api help (MapBox or similar)

i have a geoJSON objects and i want to route between waypoints on my geoJSON file. this is my example geojson file. { "type":"FeatureCollection", "generator":"JOSM", "bbox":[ ...
2
votes
2answers
58 views

PostGIS convert point->raster->GeoJSON

My question is a follow up to Convert a raster to GeoJSON polygons in PostGIS I'm trying to accomplish querying point data from the database, and then turn that into a raster for calculating ...
2
votes
0answers
28 views

How to make a network /tower coverage map in in mapbox

I am new to mapping and currently I am trying to make a map showing coverage of a network provider here in my country. The map I am trying to achieve should look similiar to that at ...
1
vote
2answers
113 views

Separating two GeoJSON files, one with properties and another with geometry?

Using Leaflet with GeoJSON, I would like to create a map with geometries, and with alphanumerical data associated to each item of the geometry. A map very similar to the easy sample at ...
2
votes
1answer
705 views

how to draw a polygon in leaflet and add it to geojson file

I am working on a small project with leaflet. the goal of the project is to show a geojson file and updating it dynamicaly from the window of the web site. I have imported the geojson file to the map. ...
4
votes
2answers
1k 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 ...
1
vote
0answers
13 views

OpenLayers3 creating large GeoJSON layers off the main thread

I am pretty new to this field and struggling to find out whether my idea is worth pursuing further. The problem I am facing is that I have to load a couple of large GeoJSON layers into my OpenLayers ...
0
votes
0answers
32 views

populating a geojson from postgresql with php depending on zoom level

i am about to load a few thousand polygons (a grid 500x500m) from a postgresql db into a leaflet map with php script converting the data into a geojson. the php script populates the geojson depending ...
7
votes
1answer
3k views

What's up with the GeoJSON spec and CRS as a IRM?

I'm writing a web API to our GIS data, currently revamping our geocoding service. I'm creating the option for folks to specify the output type as GeoJSON so I'm trying to follow the spec. Our data is ...
0
votes
1answer
502 views

Loading GeoJSON via AJAX after adding Layer to OpenLayers 3?

I'm trying to add a new GeoJSON layer to OpenLayers 3 that I have to fetch via AJAX. I want the user to click on a list of layers, have it add an empty vector layer, and then make an AJAX call and ...
2
votes
1answer
35 views

GeoSpatial queries and indexes in memory

I am currently using Spark/Scala to process some data, and I am at the point that I need to run ~3M of geospatial queries. One common solution would be using MongoDB or PostGIS (or Magellan for Spark ...
0
votes
1answer
34 views

Speeding up large GeoJSONs in Leaflet maps

I've been racking my head around this problem for some time and I could use some help; I am trying to use Leaflet to make a map which displays multiple projection boundaries, i.e. UTM, State Plane, ...
0
votes
0answers
60 views

CartoDB data load from csv , geojson file error

I had installed CartoDB locally on my Ubuntu 12.04 and the installation was perfect. I can create dataset by CartoDB's GUI and able to visulaize data perfectly without any problem. But when i drag and ...
3
votes
1answer
37 views
1
vote
2answers
545 views

Polygon intersection with bounding box with polygon's holes intact

I am trying to serve GeoJSON FeatureCollection tiles with each feature's geometries trimmed to the tile boundary. I am working on a Leaflet plugin to re-assemble the geometries. It works by building ...
0
votes
1answer
38 views

Leaflet + GeoJSON and ArcMap : Map fails to load if missing variable

I am working on my first web map using the Leaflet API. I have a shapefile that was converted to the GeoJSON format (within ESRI's ArcMap software). The Shapefile contains a field attribute named ...
3
votes
1answer
3k views

ogr2ogr : Converting KML to GeoJson

I have a requirement to convert .KML 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, when I run.. ...
2
votes
3answers
1k views

Shapefile to GeoJSON conversion

I am working with OpenLayers. I want to convert Shapefile into GeoJSON format and send it to browser to show with OpenLayers. But the problem is that when the size of my Shapefile is bigger than 60Mb, ...
1
vote
2answers
177 views

working with geojson and vincent on python

I want to import a geojson file into python so I can map it with a visualization package vincent and merge with other data in a pandas data frame. To be specific, the said geojson file is: ...
0
votes
3answers
299 views

How to load geojson from geoserver to define a variable in leaflet?

How can I load a geojson file from geoserver in leafletjs? There are lot of suggestions out there, but none of them work for me. Currently my app loads a js file from the server that starts like ...
1
vote
1answer
59 views

Convert a raster to GeoJSON polygons in PostGIS

I'm trying to convert a raster to a polygon and export it from PostGIS as GeoJSON. Specifically I want each pixel to be a polygon with associated the raster value. PostGIS seems to have a few ...
1
vote
0answers
180 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
38 views

Stubborn geojson layer misaligned with mapbox (leaflet) tiles only in production website, not in codepen or other online sandboxes

You can see my code and expected result in this running swiftly in codepen! Other online sandboxes work as expected too. The exact same code running in my php file on my wordpress site, shows the ...
2
votes
1answer
59 views

Why won't GeoJSON load?

I'm working with openlayers3 and I wanted to load a GeoJSON file from my local ../assets/data/countries.geojson. Nothing is wrong but it didn't appear on the screen. This is my code: <!doctype ...
1
vote
1answer
37 views

hide unhide layers in leaflet

I want to hide somme layers when I click in a layer and resotore the visibility back after clicking out I tried with this code but it doesn't work here also the punker code Hide show layers var ...
0
votes
2answers
479 views

PHP PostGIS to geoJSON missing required parametar error

I'm using this PHP PostGIS to geoJSON script: https://gist.github.com/bmcbride/1913855 But I keep getting this error: 'missing required parameter: geotable' This is my code: # Retrive URL ...
1
vote
1answer
172 views

Is there any method to retrieve SQL queries into a GeoJSON file using JSP?

I want to display the contents of my PostGIS database of various shape-files in leaflet pop-up dynamically. I know there are static methods available that retrieves attributes. But I need to by ...
0
votes
1answer
46 views

GeoJSON properties not displaying in popup-leaflet GeoDjango

I want to show the markers in different colours based on column(rastervalues) values in leaflet. My geojson data is {'geojson': "[{'type': 'FeatureCollection', 'features': [{'type': 'Feature', 'ge ...
0
votes
1answer
187 views

Try to load GeoJSON object with OpenLayers 3

I'm a bit new to working with OpenLayers 3. I'm trying to load a GeoJSON object in OpenLayers 3 but it display the center only point[0,0], which not even in my GeoJSON object, where I'm going wrong. ...
1
vote
1answer
249 views

Geoserver 2.5.2 upgrade - now GeoJSON and GML WFS not working

I've recently migrated Geoserver from a Geoserver 2.1 to a clean install of Geoserver 2.5 and copied across my data files. However, I'm not finding that clicking Layer Preview, going to the All ...
1
vote
1answer
291 views

Rendering TopoJSON in Leaflet from GeoJSON PostGIS output?

I'm using the query found here SQL query to have a complete geojson feature from PostGIS to get a geojson that I can display on a leaflet map. However, the amount of data is kinda big and the ...
1
vote
1answer
33 views

OpenLayers 3 Vector layer

Can i add two sources to Vector layer, i want regular feature source, and geojson source? Maybe can I do something like: var layer = new ol.layer.Vector({source: VectorSource, GeoJsonSource}); My ...
2
votes
0answers
22 views

Unable to load and display data from geoJSON source in OpenLayers

It seems like OpenLayers library changes from day to day and loses compatibility with the previous minor version each time... But, actually, I have another question to ask. The problem I face, is that ...
1
vote
1answer
50 views

Leaflet marker cluster not working on GeoJSON with MultiPoint geometry

I have a GeoJSON file of fly tipping incidents that I have managed to display on a basic Leaflet map. I am now trying to incorporate the marker cluster plugin, but I am having problems as it does not ...
1
vote
0answers
26 views

Plot a bubble chart in d3.js by giving an local geojson file as an input

This is the content in my geojson file { "type": "FeatureCollection", "features": [{ "type": "Feature", "properties": { "profit": 326, "npa": 174.000000 } }, { "type": ...
1
vote
1answer
19 views

How to include a GeoJSON FeatureCollection inside another FeatureCollection?

In the GeoJson spec 'An object of type "FeatureCollection" must have a member with the name "features". The value corresponding to "features" is an array. Each element in the array is a ...
0
votes
1answer
621 views

Read GeoJSON with openlayers

I generated a GeoJSON from a table in EPSG:WGS84 in postgis SELECT ST_AsGeoJSON(geom) FROM "onibus" I put this file into the www folder on my server. I'm running geoserver locally. My pages are ...
1
vote
1answer
981 views

How do I add elevation data to a GeoJSON line from a GPX file?

I understand that elevation can be added as an optional third value in Coordinates (lat, long, elev) in a geojson file, but I can't find a way to actually do that from a gpx file. I've used ogr2ogr to ...
1
vote
2answers
45 views

How can obtain geojson geometry ? OL3

I need to get a GeoJSON geometry of this, then use a buffer for the TURF library. Get get data from GeoJSON turf but would not admit it in any way. any ideas ? This is my code: var feature_buff = ...
2
votes
1answer
50 views

European postal code shapes provider

I am looking for a single (paid) provider of postal (zip) code shapes (boundaries) for countries in Europe. I hope to find reliable partner with reasonable pricing and update policy. What I need are ...
0
votes
0answers
44 views

Failed to load resource: the server responded with a status of 404 (Not Found) Django while displaying geojson data on map

I'm getting the following error when I try to diplay geojson data on map. http://localhost:8000/geojson/%7B%22type%22:%22Point%22,%22coordinates%22:[76.996944,31.58]%7D Failed to load resource: the ...
1
vote
0answers
14 views

How to display Geojson file over OSM, google satellite as abase layer (at correct location) in open layer?

How to display Geojson file over OSM, google satellite as a base layer in open layers. It is showing somewhere. var map = new OpenLayers.Map('map',{ projection: "EPSG:900913", ...
2
votes
1answer
111 views

GeoJSON: PolyhedralSurface geometry type not supported

I am trying to make a 3D web application which should be able to render 3D buildings (I will be using Cesium, but that is not that important for now). I basically have a database consisting of the 2D ...
0
votes
2answers
82 views

Adding one search box for multiple GeoJSON polygon layers?

Multiple GeoJSON markers can be combined to one group layer then search on a specific attribute but doesn't work for GeoJSON polygons. How to put multiple GeoJSON markers and polygons in one search ...
1
vote
2answers
230 views

Leaflet and census block data: not displaying

I am new to leaflet and am trying to load a geojson file showing census blocks and associated information for a city in CA. It is a small city and not too many census blocks. I cannot get the popup ...