An open geographic data format based off of JavaScript Object Notation

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39 views

ArcGIS API for JavaScript - Adding Point(s)

I need to add a single point, I am new to JS and ArcGIS API. I was looking for some code examples on how to create a point and/or a few other points (as needed) I can't use any additional ...
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1answer
65 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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1answer
90 views

Getting coordinates to create geojson

I have a geotiff that I have been working with in tilemill and I would like to select portions (buildings) in the map and create new layers as geojson objects. My issue is I don't know how to get the ...
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1answer
361 views

WFS 2.0 with bbox filter and attribute filter

I am trying to get the following WFS GET request to work: wfs = "service=WFS&version=2.0.0&request=GetFeature", name = "&typeName=storeName:layerName", bboxFilter = '&bbox=' + ...
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0answers
119 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> ...
3
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1answer
68 views

Rounding bug using ST_GeomFromGeojson()

Let's say I have the following geographical point represented in GeoJSON: {"type":"Point","coordinates":[-109.0,35.292506]} When I run the following conversion, things work as expected: SELECT ...
8
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3answers
221 views

Metadata and GeoJSON?

My agency currently maintains and distributes shapefiles with FGDC XML metadata. We have now converted a lot of shapes to GeoJSON but are concerned that if our developers forget where they got the ...
2
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1answer
140 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 ...
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37 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 ...
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2answers
121 views

Georeferencing Vector Layer (shp) from Mollweide Projection to Custom CRS in QGis

the title might be a little complex. Its part of a massive project: I'm working on a fantasy world; a map, to be more specific. I basicly just started to paint a world map in Photoshop, but over time ...
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1answer
133 views

Issue with using TopoJSON server API to return TopoJSON object with properties

I am creating a node application and using TopoJSON server API reference (see the link below) to convert a GeoJSON object to a TopoJSON object. TopoJSON server API reference I used these three lines ...
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0answers
47 views

GeoJson attributes encoding limitation

I have problem when trying to encode attribute values in latin1 using ogr GeoJson driver. Accent char are not displayed correctly. Is the geoJson encoding is limited to UTF-8? I cant find any info ...
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1answer
78 views

GeoJSOn or WFS service to view, edit and save geometries

To view, edit and save in postgis geometries using OpenLayers + Geoserver what is recomenadado use GeoJSON or serivços WFS? I ask this for performance and additionally want the edition is recorded ...
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80 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 ...
3
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1answer
91 views

Consume geojson web service in ArcMap

I need to consume data from a REST endpoint that returns features in geojson format within a model in ArcGIS 10.2. Is there a way to access a URL instead of opening a file? If there is no way to ...
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3answers
475 views

Using geojson hosted on GitHub from Leaflet: it doesn't work

I'm trying to use a geojson hosted on GitHub (rif. https://raw.githubusercontent.com/cesaregerbino/DatiGeo/master/ScuoleTorino.geojson), from Leaflet. here you are my code .... My first ...
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1answer
91 views

reproject vector layer with pyqgis with new CRS does not worl

In QGIS I am running a script in th python toolbar to export all visible vector layers to a GEOJSON with this snippet: canvas = qgis.utils.iface.mapCanvas() allLayers = canvas.layers() for i in ...
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1answer
103 views

Filter geojson or shapefiles

I'm trying to create a geojson file with a few shapes of roads from OSM. Now, I've been able to get shapefiles of the greater region (province) these roads are in from http://download.geofabrik.de/ . ...
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1answer
438 views

Read GeoJSON with openlayers

I generated a GeoJSON a projected table in EPSG: 4326 domeu postgis SELECT ST_AsGeoJSON(geom) FROM "onibus" I put in the www folder on my server I'm running geoserver locally my pages are also in ...
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2answers
735 views

How to plot geo-data using matplotlib/python

I am trying to plot a polygone on python, using different libararies, but no one of these worked with me. I tried vincent ,Shapely , .. and now matplotlib. I don't wanna use softwares like qgis I ...
4
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2answers
930 views

Convert Sql Server Spatial data to GeoJSON & plot on map

I have a sql server table with Geo spatial data. An example of row would be (with Column names): type: streetline code: 231001 geog: 0xE6100000011 ........ Centroid 0xE61000000C....... geom: ...
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2answers
221 views

PostGIS to GeoJSON with GDAL: how to get lat/longs?

I'm trying to convert line features from PostGIS to GeoJSON files, as follows: from psycopg2 import * from subprocess import call conn = connect(dbname='gis') cur=conn.cursor() cur.execute("SELECT ...
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1answer
522 views

Large loads geojson from mysql to leaflet?

I have a mysql database with +25K rows including geometry and other attributes. Using a mysql2geojson php script I then added it to a leaflet map. It is super slow now, what can I do to boost the ...
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1answer
737 views

ogr2ogr : Converting KML to GeoJson

I have a requirement convert .HML 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, I am getting beloow ...
2
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1answer
224 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?
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62 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 ...
2
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2answers
147 views

Convert Shapefiles to GeoJSON?

I'm trying to convert Shapefiles from the State of Texas Senate Districts website into a GeoJSON file for use with Google Maps API. I'm using QGIS to facilitate but I can't get the ...
0
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1answer
178 views

How to generate random GeoJSON polygons (latitude, longitude)

I am looking how to generate polygons in GeoJSON format with random locations (latitude, longitude), if I generate totally random set of points it will not produce valid polygons. So my question is ...
0
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1answer
253 views

Using Openlayers Protocol.HTTP GeoJSON format

just took Openlayers GeoJSON Example and inserted the features to file json1.json instead using a variable, then tried to preform HTTP call: var epsg4326 = new OpenLayers.Projection('EPSG:4326'), ...
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56 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 ...
2
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2answers
319 views

How to load big geo-data file into web application

I am building a web app where I show details in map. I load data using geojson file (190 mb). I was looking in different possibilities to show the data, here there are: Leaflet GeoJSon: it should ...
2
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1answer
186 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 ...
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54 views

mongoDB query not working as expected

My mongoDB collection has all three types of shapes. A point is stored as { 'CE_NO': '_', 'E_NAME': 'RAILWAY BOOKING CENTER', 'SRCTYPE': 'Facility', 'geom': { 'coordinates': [ ...
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0answers
118 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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1answer
832 views

Which are the Geojson css style properties for mapbox.js?

I try to style a LineString in a Mapbox Map through L.Geojson and all the style properties I could find are: fillColor, colour, weight, opacity. Does anyone know if there is something else? For ...
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2answers
593 views

How to plot geoJSON using Python?

I have huge geojson file that I am working on: [{ "geometry": { "type": "MultiPolygon", "coordinates": [ [ [ ...
1
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1answer
83 views

ArcGIS Server JSON to GeoJSON does not always work

I'm using GDAL 1.10.1 for reading ArcGIS Server responses with automatic conversion to GeoJSON format as described in How to convert ArcGIS Server JSON to GeoJSON? post. However, it looks like some ...
3
votes
1answer
578 views

converting/parsing geojson into com.vividsolutions.jts geometry

Does any has any experience with converting string geojson into com.vividsolutions.jts geometry object (point, polygon, etc). Maybe there is some java library I cannot find. Greets!
1
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2answers
64 views

Remove unneeded columns from geographic data file?

I have some GML data that has some unneeded columns in it. I'd like to remove these columns in order to reduce the file size. (To clarify: I mean that the file has many points in it, and each of these ...
0
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2answers
50 views

Is there any way to use open source tools to make sure that lines on a map dont overlap?

I am a generalist developer getting the hang of basic gis. I made this geojson map by clipping and converting different shapefiles. The problem is that the precincts of New Orleans extend into the ...
4
votes
1answer
238 views

Leaflet - Change style on click

I am beginer with Leaflet library and I am facing an issue with a geojson. I have an extern geojson file (points) and I would like to display a circle for each point coordinates and get a bigger ...
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1answer
26 views

What format comes out when you export from OSM

I am trying to export this osm output (and then convert it into geojson). I click export and get a file called "map." What format is this file in?
2
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1answer
41 views

How can I see the layers in an .OSM file?

I have an osm file. I am trying to convert it to geojson with ogr2ogr. I get an error that ogr2ogr can't handle multiple layers. How can I tell what layers are in the file and remove them? I see from ...
2
votes
3answers
306 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 problem is when the size of my shape file is so big like 60MB or ...
2
votes
2answers
283 views

How do I convert open street map export to geojson?

I am trying to render this output from open street map into geojson to add into a map. I only need to export the data one time. How do I do that? OSM lists it as a use case. I see a js library to do ...
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0answers
117 views

django---error in displaying data and displaying it on the map

. i am trying to display a feature queried from postgis. . i also designed a user input field to enter the id of the desired feature to be displayed. . i have already queried the attributes first ...
0
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1answer
348 views

Issue with a point insertion into a Geoserver points layer. WFS-T

How is the best way to insert a feature from the client side into an existing GeoServer layer? Maybe using an ajax call and JSONP? Or OpenLayers (i can't figure out how to have the proxy working)? ...
2
votes
1answer
255 views

Converting JSON/GeoJSON files to Shapefiles

I have a quick question please about converting JSON/GeoJSON files. I'm trying to convert some JSON files into something I know how to work with (shapefile, R objects or PostGIS). I'm afraid I have ...
1
vote
1answer
228 views

TileMill: How to access geojson properties with CartoCSS

When trying to display a geojson layer in TileMill, is it possible to access the 'properties' of each feature? My geojson looks like this: "type": "Feature", "geometry": { ...
2
votes
1answer
446 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 ...