An open geographic data format based off of JavaScript Object Notation

learn more… | top users | synonyms

0
votes
2answers
285 views

Is there a typescript interface for “GeoXML” formats (such as WFS and WMS) apart from GeoJSON?

I want to work with JSON behind TypeScript interfaces but I'm not sure what the spec should be outside of GeoJSON. Is there a spec which is more encompassing then GeoJSON and includes things like a ...
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 ...
0
votes
1answer
2k views

Leaflet GeoJSON features not showing up in map

New to GeoServer and Leaflet...loving it so far, but I am weak in JavaScript. I have just built a simple web page that should load points from a GeoServer WFS service using GeoJson. However, even ...
2
votes
1answer
2k 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 ...
0
votes
2answers
460 views

How to convert gml to geojson using Python and ogr with geometry transformation?

Does anyone have an idea how to convert gml to geojson (with attributes) using Python with ogr bindings? It should be possible to transform geometries to different coordinate system. I can not use ...
6
votes
3answers
1k views

Advantages of WFS over GeoJSON/KML?

I'm planning to create an online map with openlayers (2 or 3) or leaflet. I have to show some points/markers (~30.000), polygons (~500) and lines on top of an OSM map in several layers. Those points ...
0
votes
1answer
503 views

Search for geojson polygon in mongodb implementing a custom vector tileserver

I am building a vector tileserver in node.js using mongo 2.4.7 as database. My database contains geojson data from multiple sources and they are in many layers. It is important to render the layers ...
0
votes
1answer
258 views

Why do Shapefiles and GeoJSON behave differently in GDAL Python?

I have a test.shp. I loop over the file, buffer the features, and write the buffers to a new file. I tested writing the buffers to a Shapefile and to a GeoJSON. If I try to use the new buffer layer ...
7
votes
1answer
370 views

Python3 libraries for GIS analysis

I am trying to do some spatial data analysis in Python 3 now, and I was wondering what the best libraries are for GIS in Python 3. The Fiona library was developed with Python 3.3 but the Python 3+ ...
0
votes
3answers
2k views

How to get WKT or GEOJson by country or city name with Overpass API?

I'm trying to understand Overpass API, I'm experimenting with it, but cannot get what I expect. Overpass API doesn't return me neither polygon shapes, nor WKT, nor GEOJson, nor even a highlight of the ...
3
votes
2answers
855 views

GeoJSON formatting for Leaflet

I am using http://GeoJSON.io as the source for my data, which is then to be displayed via Leaflet.js. I found that leaflet neads the file to include "var name = {" but GeoJSON.io doesn't like it, ...
5
votes
2answers
1k views

How to generate one geojson file from several rows in Postgres/PostGIS?

I have a table with geospatial objects, in particular, polygons. I know that I can generate from one row a geoJSON string using ST_AsGeoJSON(http://www.postgis.org/docs/ST_AsGeoJSON.html). But I would ...
1
vote
2answers
4k views

How to project pixel coordinates in leaflet?

I am trying to create a map based on an image which is 16384x16384 px, but I would also like to add markers at specific locations using pixel coordinates of this given image. I created a tile layer, ...
8
votes
2answers
10k views

setStyle() function for GeoJSON features - Leaflet

Ok, since I already asked a very long question about this, but since it didn't get any new replies for a while, and not to get confused in details, I will keep this one simple the best way I can. If ...
2
votes
2answers
2k 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 ...
1
vote
1answer
218 views

How Do I configure PostGIS 2.0 on windows to use ST_GeomFromGeoJSON?

I have installed PostGIS 2.0 on a Postgres 9.1 database on a Windows 2012 Server. I need to write an insert query, which uses ST_GeomFromGeoJSON(). The Docs for this query say that I need - JSON-C >= ...
6
votes
1answer
6k views

problem adding pop-up to GeoJSON layer in Leaflet

I'm new to working with the Leaflet API and am running into trouble with creating popups for a GeoJSON layer. I've looked at the following post as a reference and am still having difficulty: binding ...
3
votes
3answers
382 views

Extracting Earthquake Depth from the USGS GeoJson Earthquake Feed for use with Openlayers

I have some GeoJson from the USGS as follows: {"type":"Feature","properties":{"mag":4.3,"place":"30km ESE of Jarm, ...
3
votes
1answer
2k views

My GeoJson will not display on a Vector Layer in Openlayers

I have geoJson from the the USGS that I am downloading to my server. It validates just fine with geojsonlint. When I past the JSON into this Openlayers example it says it is bad input json. My Code ...
0
votes
0answers
354 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: [ ...
5
votes
3answers
1k views

Can we merge shapefiles with different geometries (point and polygon) to get a single layer which shows both geometries?

I want to merge two shape files in which one is of point geometry type and other is polygon type in order to get a single layer containing both points and polygon in a single map.
5
votes
2answers
1k views

OGR merge shapefiles of different geom type into a single GeoJSON feature collection

I'd like to merge shapefiles of different geometry types into a single geojson feature collection, but OGR says it doesn't support update of GeoJSON files: $ ogr2ogr -f GeoJSON -t_srs crs:84 -lco ...
1
vote
1answer
174 views

Access attributes on featureCollection

The geoJSON-String: { "type": "FeatureCollection", "features": [ { "type": "Feature", "properties": {"title": "Standort 1 "}, "geometry": { "type": "Point", ...
1
vote
2answers
72 views

How to remove features from geojson by mouse selection?

There are these unnecessary lines in my geojson: You see, not all the borderline was deleted when I merged two countries. Is there any way to quickly select and remove the features in a practical ...
5
votes
1answer
222 views

Is there a free dataset of historical geocoordinates of ancient cities and places?

Is there a freely available dataset (csv, geojson, topojson, etc.) with geocoordinates of ancient cities, for example of the Roman Empire? Ideally with additional information like population size? ...
5
votes
3answers
3k views

How to convert geoJSON to python objects?

New to the site, and to geoJSON, and to python. My goal is to read in a file with geoJSON data, and use it to generate shapes to be used in an application that is using python scripting. Python has ...
1
vote
2answers
430 views

Is it possible to convert regular JSON to GeoJSON?

My apologies if this is a repeat question, I searched here and couldn't find an answer. I have JSON data I've exported from Openpaths.cc which contains lat and lon values. However, the data is not in ...
1
vote
1answer
1k views

Get Features from OpenLayers Layer.Vector not working

polygon_layer = new OpenLayers.Layer.Vector("Polygone", { projection : projLonLat, strategies : [ new OpenLayers.Strategy.Fixed() ], protocol : new ...
1
vote
1answer
553 views

How to export a geojson file with correct order of coordinates?

I was testing rendering of data via GitHub in geojson format, because I wanted to use it for INSPIRE data. INSPIRE data are in GML 3.2.1 format. I've downloaded one of datasets from ...
1
vote
0answers
110 views

Possible to rollback from QGIS 2.0.1?

I'm running Ubuntu 12.04 LTS. Unfortunately Ubuntu has automatically upgraded my QGIS from 1.8 to 2.0.1. And 2.0.1 which creates GeoJSON files that OpenLayers cannot parse. Would be best for me to ...
3
votes
1answer
1k views

ogr2ogr specify lat/long order on conversion to GeoJSON

When using ogr2ogr to convert a polyon from a .shp file to GeoJSON, I noticed that it writes the coordinates in order lat, long. I noticed this because whenever I tried to view the GeoJSON on a map, ...
2
votes
2answers
364 views

animate polygons in series of kml/geojson/shp

I have a series of KML files (though they could easily be converted to geoJSON, SHP, or anything else that ogr2ogr can handle), each file containing a set of polygons that correspond to the alpha ...
1
vote
2answers
660 views

Import Error:No module named shapely.wkb

OpenERP GeoEngine I have installed OpenERP 6.1 version, works fine .,When i'm trying to add CamptoCamp GeoEngine Modules with OpenERP getting below find eror: Installation Prerequisites: OpenERP ...
1
vote
1answer
856 views

Converting geojson to wkt with OpenLayers

I was just wondering if there was a good way to convert GeoJson data to WKT data using OpenLayers. The method I've tried is to create a Feature.Vector with the GeoJson and then tried using ...
1
vote
1answer
144 views

simplilfy geojson file [duplicate]

I have a geojson file, but it's way too heavy for the app I need to develop I'd like to know what alternative do I have to make it lighter. I was thinking about simplifying it's shapes, and also ...
1
vote
2answers
178 views

Is it possible to export a GeoJSON with an array field from a joined layer?

I'm using QGIS to 1) load a shapefile, 2) join the shapefile data with a CSV-file and finally 3) exporting the layer as GeoJSON. Hence, I end up with something like this, where the properties object ...
1
vote
1answer
95 views

Fw tools using error

I am using Fw tools. And I am writting cmd screen: ogr2ogr -f \"GeoJSON\" -t_srs WGS84 D:\\electric_Data1\\direk.json D:\\electric_Data1\\ag_direk.TAB tried. And I have a error. error code: ...
4
votes
2answers
2k views

How to merge TopoJSON features?

I currently have a coordinate based map of the US and it's states for topojson (https://github.com/mbostock/topojson). The coordinates are a JSON array (as topojson works), data looks like this: ...
0
votes
0answers
203 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 ...
2
votes
2answers
488 views

Show different marker for cluster and icon for single vector features in OpenLayers

I have a vector layer which is geoJSON file containing school points and their attributes,to visualize this i defined cluster and show circle which size is based on the number of features it contains. ...
4
votes
1answer
920 views

Geotools: Efficiently writing a GeoJSON stream into a Shapefile

I've been trying a few solutions to efficiently convert GeoJSON into a shapefile without having to store all features in memory. I'm using GeoTools 9.2. The problem is not so much in how to stream ...
2
votes
1answer
521 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 ...
1
vote
1answer
240 views

projection error on Leaflet map

I am trying to add a converted shapefile (now a geojson) to a Leaflet basemap, using EPSG 26986, so I tried using proj4leaflet to reproject it. However, I keep getting an error message "phi2z has ...
12
votes
1answer
1k views

What is topojson and how is it different than geojson?

This is a conceptual question. What are the differences between these? and what are the pros and cons of these formats?
1
vote
1answer
404 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
252 views

OGR2OGR workaround for gpx-json conversion bug

ogr2ogr produces invalid GeoJSON when multiple layers are involved (http://trac.osgeo.org/gdal/ticket/3842). For example: ogr2ogr -f GeoJSON "$f.json" "$f" tracks routes For me the bad GeoJSON ...
1
vote
1answer
946 views

How to use ArcGIS 10.2 Features to JSON output in web maps?

Using the Features to JSON tool that is now available with 10.2, is there additional formatting that needs to be done to the files before they can be displayed as web maps?
7
votes
4answers
14k views

How to load external geojson file into leaflet map

I would like to load a geoJSON (polygon) file into my leaflet map. I have seen examples where geoJSON is embedded into the javascript code but I can't find any examples showing how it is done with an ...
1
vote
1answer
483 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. ...
2
votes
2answers
737 views

How do I sort a geoJSON feature collection alphabetically by a property value?

I am trying to sort the objects in a geoJSON FeatureCollection alphabetically by the values of one of their properties. How do I get to the nested object properties with JavaScript? I have tried using ...