An open geographic data format based off of JavaScript Object Notation

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2
votes
1answer
66 views

SQLServer Shapefile Export won't load in MongoDB due to self intersection

I am having an issue loading a handful of GeoJSON files that were created from a shapefile export from SQLServer into MongoDB. This polygon will not load in MongoDB because of two duplicate vertices ...
2
votes
1answer
134 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
2answers
171 views

Click Events with Leaflet and geoJSON

How do I attach a click event to a geoJSON that then executes an Ajax function when clicked. I looked into onEachFeature but that executes when the geoJSON is loaded, not when clicked, thus executing ...
2
votes
1answer
53 views

Why is my GeoJSON polygon only displayed as a line?

I'm trying to convert a simple shapefile drawn in GIS to GeoJSON. However, it's not working and I don't know why. The file converts with QGIS (Save As), but the http://geojsonlint.com/ doesn't plot ...
2
votes
2answers
141 views

export map state as JSON: Web_Map_as_JSON

Is there a way to export the current map state as a JSON object, mostly named Web_Map_as_JSON. The JSON specification should be like this. In other words, it would be convenient to have a function ...
2
votes
1answer
467 views

Geoserver WFS - Can I Pass in Filter Parameters via the URL?

I'm trying to use PHP's CURL function to fetch geoJSON information from a GeoServer instance. I'm doing this using url variables rather than trying to construct a full xml GetFeature request. ...
2
votes
1answer
67 views

Add GEOJSON layer in tilemill EACCES symlink Error

I'm trying to add a GEOJSON layer to Tilemill [ Version 0.10.2 (v0.10.1-293-g697c86c) ], installed on ubuntu 14.04. I've confirmed that the ID used is unique and attempted to load the file into my ...
2
votes
1answer
586 views

What is the best or recommended way to store a GeoJSON FeatureCollection in MongoDB?

The comments in this question: Shapefile to GeoJson conversion using C# raised another one: what is the best way to store a GeoJSON FeatureCollection in MongoDB? Is there any sort of convention when ...
2
votes
1answer
217 views

Can you use nested properties to style features in CartoCSS

I've imported a GeoJSON layer into TileMill and am having trouble styling based on the properties in the features. The features' properties objects have objects nested within them, and I haven't found ...
2
votes
1answer
258 views

Using ogr2ogr to download GeoJSON files from ArcGIS MapServer

I am trying to download as a GeoJSON file a line feature from a ArcGIS MapServer REST Service run by the National Park Service (link is here) so that I can open the data in QGIS. Using the guide ...
2
votes
1answer
552 views

OpenLayers3 vs Leaflet for styling multifeature geojson

I'm experimenting with various options for displaying geographic information to the public in html format. The ultimate aim is to build an online application where anyone can add the route they cycle ...
2
votes
1answer
1k views

Transform projection from EPSG:4326 into EPSG:900913

. i've got this problem about projection. .i just wanted to know what am i missing. . i already displayed map base layer using openlayers through base_layer = new OpenLayers.Layer.WMS( "OpenLayers ...
2
votes
3answers
290 views

json to xml transformation with x2js

I am trying to transform a JSON object to XML, but i have somehow get stuck in jscript (not an expert). Here is the code: ... var GEOJSON_PARSER = new OpenLayers.Format.GeoJSON(); var ...
2
votes
1answer
1k views

How do I set the fillcolor of polygons in Leaflet.js dynamically?

I'm using the interactive chloropath example for leaflet.js I figured out how to make each of my polygons add a running tally of values to the bottom of the page after each polygon is clicked. Upon ...
2
votes
2answers
1k views

How do I modify features during runtime, in a GeoJSON feature group on Leaflet?

I have added some GeoJSON to my Leaflet powered map as below. (Altered version) var array_of_layers = L.layerGroup([]); var styleholder = []; var belgium_style = {color: "#d3e46f"}; var bosnia_style ...
2
votes
1answer
330 views

How to control the order of appearance of markers using leaflet?

I'm plotting out markers from GeoJSON files onto my Leaflet map. Some of these markers overlap so now I want to control the order of appearance of these markers so that one type always sits above the ...
2
votes
2answers
1k views

How to determine intersection between geojson feature and given coordinates?

I'm overlaying a leaflet map with features of geojson, fetched with d3 and added as SVG elements to the DOM. My geojson contains too many features to render at once, so my goal is to add to the map ...
2
votes
1answer
305 views

Kartograph Open Street Maps

Firstly, congratulations to Gregor Aisch for creating such a wonderful library, thank you! I am having a little trouble rendering an svg from some osm data. I downloaded the Sweden transportation ...
2
votes
1answer
738 views

How to visuilze PostGIS data in GeoJSON format with PHP

I need to visualize PostGIS Geometry column as an overlay of a Leaflet tiled Map. I started a question here ,but didn't get any simple and satisfied answer. So I am starting this question. I got an ...
2
votes
2answers
763 views

How to Merge/Join GeoJSON and JSON?

I want OSM administrative boundaries from http://global.mapit.mysociety.org/area/14455.html. I can get the geodata in different formats there, but the attribute data always is a separate JSON file. I ...
2
votes
1answer
568 views

GML and GeoJSON vector layer can not display in Firefox and Chrome

I have following codes. It works perfectly in IE (GML and GeoJSON vector layer was loaded), but not in Firefox and Chrome without any errors noticed. Please help me to fix this problem. Here is the ...
2
votes
1answer
2k views

Mapping x, y pixel coordinates to latitude and longitudes on the WGS84 datum

Apologies in advance for the long question, I am fairly confused at this point and I figure if I show my thought process any flaws early on in the piece can be more easily pointed out. I have a grid ...
2
votes
2answers
757 views

Exporting OpenLayers.Layer.WMS to GeoJSON / KML

I'm looking the way to exporting an especific region of a WMS layer to some XML format (GeoJSON, GML, KML) using OpenLayers and Geoserver. I've found how to export features objects with ...
2
votes
1answer
4k views

OpenLayers - a GeoJSON layer

OpenLayers can parse GeoJSON in order to create an array of features. So, it is possible to create a layer from GeoJSON input by simply parsing it and then adding the features to a new vector layer. ...
2
votes
1answer
1k views

How to render GeoJSON tiles from Tilestream for polymaps?

Have been using polymaps successfully till now. Need to generate GeoJSON tiles for Canada Provinces. Found Tilestream and got it working with Tilemill. Is there a way I can make Tilestream hand ...
2
votes
0answers
97 views

Using Extjs 5 & OpenLayers 3

To consume geojson data from a REST HAL CORS webservice, in client side i'm using ExtJs 5, but to map data having geometries i'm stuck between choosing geoExt2 which has a branch based on extjs5 and ...
2
votes
0answers
63 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
votes
0answers
115 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 ...
2
votes
1answer
75 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
votes
1answer
68 views

Openlayers: Parsing GeoJSON-properties results in a “data”-property in feature

I'm using OpenLayers 2.12. I try to load a GeoJSON-response from server and (nearly) everything works fine: but the properties contained in the GeoJSON-response ("nummer" and "befund" below) were ...
2
votes
0answers
75 views

Developing workaround to arcpy.asShape truncating all values to 3 decimal points?

I've read a few questions\answers about converting a GeoJSON Shape into an ESRI Object. Unfortunately most of the answers pointed to decoding the dictionary's manually. Im a bit more lazy ^_^ The ...
2
votes
0answers
106 views

Using OpenLayers' Refresh strategy for GeoJSON

I am trying to use the Refresh Strategy reading a GeoJSON file in OpenLayers, however it doesn't work (but it works perfectly using for instance .Fixed() strategy), here is my code: var ...
2
votes
0answers
177 views

Getting JSON/JSONP/GeoJSON from GetFeature WFS request to ArcGIS for Server?

I'm trying to perform a GetFeature request to an ArcGIS 10.2.1 for Server WFS service and would like to get response in geoJSON format. If I look at the GetCapabilities from the service the only ...
2
votes
0answers
145 views

Formatting Google Places API GeoJSON and Import to QGIS?

Hi Stackexchange I'm trying to export JSON or XML data to my desktop and import it to QGIS. This is the URL I'm using but it appears to be incorrectly formatted: ...
2
votes
0answers
86 views

ogr2ogr does NOT save “styles”, say “color”, information; how do I get around it?

I'm using ogr2ogr to convert KML to GeoJSON and I'd like to extract style information along with the data. The bash script I am using is: filekml="/tmp/poly.kml" filegeojson="/tmp/poly.geojson" ...
2
votes
0answers
57 views

Stray horizontal lines after converting from GeoJSON to topojson

After converting a GeoJSON file to topojson, and loading the topojson into Leaflet, stray lines appear in the resulting map. Like this: What is causing this? If I view the GeoJSON, these stray ...
2
votes
0answers
61 views

loading geojson in leaflet

I just added the geoJSON vector layer in leaflet for my hybrid mobile app using phonegap, the problem is that when I add the geoJSON file of size larger than 2mb the application crashes. What is the ...
2
votes
0answers
113 views

How can I merge adjacent polygons and return all (adjacent and not adjacent) as Multipolygon?

I have a postgres database with administrative boundaries and their geometry. Each of those boundaries have an ident number. What I want to achieve: First I want to select all rows which are ...
2
votes
0answers
87 views

Adding marker on a leaflet map

I'm very new to GIS and for learning I started with building a simple web app with GeoDjango. I am using dango-leaflet. Since I have a very limited knowledge I am facing many challenges. I'm trying to ...
2
votes
0answers
285 views

Z-Index in GeoJSON features using leaflet

I have a watershed polygon with sub-watersheds contained within the larger watershed. I would like the sub-watersheds drawn on top. Can i control the drawing order of features within a geojson object ...
2
votes
2answers
248 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?
2
votes
2answers
318 views

Printing possible for openlayers GeoJson WFS with Mapfish printing service and wkhtmltopdf?

I searched lots of places but I couldn't find proper examples or documentation to do printing using Mapfish Printing service or Wkhtmltopdf. My application has a few WFS layers from openlayers and ...
2
votes
1answer
418 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
0answers
240 views

How to add an offset to a GeoJSON layer in Leaflet?

Using the example GeoJSON tutorial code at leafletjs.com. Change the myLines variable so that the two lines overlap, but run in opposite directions as follows: var myLines = [{ "type": ...
2
votes
3answers
229 views

How to get a bbox selection of huge shapefile as GeoJSON?

I have a 4.29 GB Shapefile from which I want to extract features as GeoJSON, defined by a bounding box. This should be as fast as possible, because I want to use it in a web application. My first ...
2
votes
0answers
1k views

Geoserver WFS get feature doesn't work - “SyntaxError: missing ; before statement”

I'm trying to use geoserver WFS json for creating vector layer (instead of using WMS) because this is a layer I redraw every 20 seconds. This is the code I use : function getJSON() { var ...
2
votes
0answers
194 views

Show geoJSON properties in jQuery Mobile Panel

First off I'm a novice at JS so please bear with me if this is a simple task to complete. I'm currently using the stock LeafletJS popup bubble to display the properties from my geoJSON. However, I ...
2
votes
0answers
335 views

R, GeoJSON and Leaflet

I recently learned about leafletjs.com from an R-Bloggers.com post. One such tutorial that I would like to achieve is to create interactive choropleth maps with leaflet. I have been using the rjson ...
2
votes
1answer
80 views

Which conditions does the geoJSON file read from the server in?

I've added an alert to the function myReadFunction in order to detect function calls. As according to my observations, the function readMyFunction is called sometimes while I have been navigating on ...
2
votes
1answer
115 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 ...