An open geographic data format based off of JavaScript Object Notation

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1
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1answer
56 views

Layer toggle disappears leaflet

I'm having a bit of trouble finalizing a project I'm working on. When I upload my map to filezilla, my map layer toggle doesn't show up: before uploaded: after uploaded: Does anyone have any idea ...
0
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2answers
901 views

OL3 Style function

I am attempting to write a style function within an open layers 3 application that will change the fill color of a circle based on an attribute from a geoJSON piece of data. I have looked over stack ...
6
votes
2answers
123 views

Access geojson from github in leaflet

I am new to json, github, and leaflet. But I am trying to create a simple application which will render my points which are in geojson up on github. From everything I have read this should work. ...
1
vote
1answer
60 views

OpenLayers 2: Transform the geometries for a list of feature objects

I am trying to export GeoJSON for a list of feature objects. The features are in EPSG:3857 projection and I would like to convert all geometries to EPSG:4326. I am perfectly capable of doing this by ...
1
vote
1answer
215 views

Geoserver WFS GeoJSON layer in Leaflet, having trouble diagnosing 'Uncaught TypeError: undefined is not a function (Anonymous Function)' error

Pardon me if this has been addressed, I searched as far as I could for similar errors. I'm trying to serve a large amount of polyline data as a geoJSON layer from GeoServer to a Leaflet instance. ...
1
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0answers
73 views

GeoJSON to routing graph

What are the best automated ways of placing the nodes and edges of a routing graph using the GeoJSON data of a multi-level building? What other data is needed (area layout, accessor directions etc)?
2
votes
1answer
112 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
2answers
325 views

What's the best way to determine if a point is within a certain distance of a GEOJSON polygon?

What's the best way to determine if a point is within a certain distance of a GEOJSON polygon? Should one use TurfJS buffer method (https://github.com/Turfjs/turf-buffer#turf-buffer)? Can one perform ...
0
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1answer
1k views

D3.js cannot render my geoJSON file

I've been trying to draw maps using the d3.js library in a manner similar to that below. <script> //Width and height var w = 500; var h = 300; //Define path ...
2
votes
2answers
363 views

How to export thousands of features from PostGIS to a single GeoJSON file?

I know how to export one feature from a PostGIS database using ogr2ogr: $ogr2ogr -f GeoJSON out.json "PG:host=localhost dbname=xxx user=xxx password=xxx" -sql 'select id, county, wkb_geometry from ...
2
votes
1answer
455 views

shapefile for mumbai area or section wise

I am working on a project in which i need to plot data on Mumbai city map section wise or area wise but i am not able to get Shapefile for the same. Can anyone please provide me the link where i can ...
0
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1answer
39 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" ...
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0answers
125 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 ...
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0answers
75 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 ...
2
votes
1answer
262 views

OpenLayers and GeoJSON

Recently I started learning Openlayers 2x and I've been struggling for a while now with a GeoJSON and it's projections. So, here is the deal; I successfully added wms layers from ( ...
1
vote
1answer
50 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
67 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 ...
0
votes
1answer
255 views

ogr2ogr convert DXF to GeoJSON with defined geometry

I trie to convert a DXF file into a GeoJSON file with: ogr2ogr -f 'GeoJSON' -sql "SELECT * FROM entities WHERE layer = 'geom_test'" test.json dfxtest.dxf Is it possible to convert only geometries ...
1
vote
3answers
246 views

How can I create GeoJson map from OSM Data

I am trying to build a map of countries in the some countries in Europe (Spain/France/Portugal). What is the best way to build such map: Should I look for shp files, then concatenate them. Is ...
0
votes
1answer
37 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...
2
votes
2answers
595 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 ...
0
votes
2answers
746 views

Convert shapely polygon coordinates

I am trying to work with a shapefile using shapely, fiona and python. The original coordinate system is in latitude and longitude that I am trying to convert to state plane system. So I want an ...
1
vote
1answer
634 views

Convert Multipolygon Geojson to multiple geojson polygons?

I see a lot of questions going from Polygons to MultiPolygon, but is there some easy way to go the other way around? It would also be useful to preserve the attributes from the MultiPolygon to apply ...
1
vote
1answer
108 views

GeoJson based on shapefile : large coordinates

I'm quite new to GeoJson (for use with d3), and in need of some help. When I convert my available shapefile (.shp) with ogr2ogr to a GeoJson-file, the resulting coordinates are very big numbers (in ...
5
votes
1answer
268 views

Conventions for returning GeoJSON via an API

I have a queryable API that returns one or more GeoJSON FeatureCollections. Currently the response looks something like this: { "success": { "data": { "layer1": {"type": ...
1
vote
2answers
959 views

Change marker color based on GeoJSON filter in Leaftlet

This is what I would like to do: Display all features of a GeoJSON file using Leaflet. Provide a text box where a property can be entered, if any of the GeoJSON properties match with what is entered ...
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0answers
48 views

Read and Write data with Open Layers3

I'am currently using postGIS/geoDjango/OL3 I need the capability for a user to drop a point on the map, and store that in my database. When any user returns, that point will be shown on the map. ...
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vote
2answers
403 views

Using AJAX to run PostGIS SQL statements and display results via GeoServer

I am learning Web GIS, and I can't find a good example that gives a big picture of a web interface of running spatial analysis using PostGIS. What I am looking for is a graphical/GIS version of ...
1
vote
1answer
290 views

Geopandas/folium map not displaying

I'm trying to use a combination of geopandas, pandas and folium to create a polygon map that I can embed incorporate into a web page. For some reason, it's not displaying and wonder if anyone can ...
1
vote
2answers
114 views

GeoJSON from OpenStreetMap with bike routes of a city only?

How can I get (if it's possible) a GeoJSON from OpenStreetMap with bike routes of a city only? I have to say that I'm pretty new with the all the map/geo language. But as a developer I'm ...
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vote
0answers
76 views

Extract polygons of PNG with GdalOgrInJava

I have PNG pictures with polygons of different colours on them. What I plan to do is to extract these Polygons using the polygonize function (see here) Then I will try to encode the polygons in ...
0
votes
1answer
398 views

Leafletjs Invalid GeoJSON object

I am using the following coming back from a socketio connection: L.geoJson(data.streets, { onEachFeature: map.onEachFeature }); It's throwing the following error: Invalid GeoJSON object. My ...
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votes
1answer
280 views

export from json file the coordinates

Hello i need help i cant export and print the coordinates , the format of json is came from a query in a database the format is ...
2
votes
1answer
246 views

How to get a table from a leaflet map?

I have a map Here based on leaflet JS and the layers are geojson. I would like to get a table at on another div when I click on each layers. How would I be able to do that? Thanks
2
votes
1answer
97 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 ...
1
vote
2answers
296 views

Open Source solution to batch process shortest distance between points along road networks?

I have the locations geocoded (a fairly small dataset, ~200), but I haven't found a straightforward way to load these data into QGIS and perform network analysis between nodes. Any suggestions? ...
1
vote
1answer
98 views

Problem with Leafletjs and GeoJSON

I am new to Leafletjs and I am trying to figure out how to plot a polyline on a map using a geoJson object. I've gotten as far as getting a map, making it centered on a given lat/long and setting the ...
4
votes
2answers
2k views

Reproject GeoJSON in OpenLayers 3

I'm basically trying (and failing) to replicate this in OpenLayers 3. I've set up a fiddle here: http://jsfiddle.net/vu8ecy8v/5/ I'm under the impression that OpenLayers will reproject a GeoJSON ...
2
votes
0answers
85 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 ...
1
vote
1answer
572 views

How can I convert GeoJSON with multiple Polygons and MultiPolygons into single MultiPolygon?

Is this even possible? I have a GeoJSON file with multiple polygons and multipolygons, and I need to set styling on them (in Leaflet.js). I'd like to create a single, large MultiPolygon from the ...
2
votes
1answer
58 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 ...
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0answers
47 views

Export isochrones to images

I'm looking for automated/scripted ways to generate PNG images based on GeoJSON multi-polygons. I have multiple polygon isochrones for a given starting point, e.g. 10 minutes, 15 minutes, 30 minutes, ...
0
votes
0answers
185 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 ...
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0answers
190 views

How to get feature on vector layer in Openlayers 3?

I'm try to get feature of a vector layer, but I'll have 3 or more Vector layer. When I click the map, I didn't get the feature. My vector layer definition; var vectorAltAlan = new ol.layer.Vector({ ...
2
votes
1answer
382 views

Find all street names or addresses within a polygon

I have a geojson list of lat/long coordinates that make up a custom polygon of a section of my county. Ideally I would like to be able to find all the addresses that are within the polygon boundaries. ...
1
vote
1answer
73 views

openlayers 2 can't close popup

I have a map with points from GeoJSON file. I created a default style and a select style for these points. I created a popup with attributes from GeoJSON when clicking on a point. All works fine, ...
0
votes
1answer
76 views

How can I load JSON into GRASS?

I have received rainfall data in JSON format. I want to load the data into GRASS. Sample JSON output: ...
2
votes
0answers
142 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 ...
3
votes
1answer
91 views

Troubleshooting with Tiger for d3 — is this the wrong projection? Why's it look like this?

UPDATE: Solved, sort of … I downloaded the file afresh and tried feeding it through ogr2ogr and topojson again … and wouldn't you know … after a while it worked. I think I was possibly not setting an ...
1
vote
1answer
688 views

Converting JSON to GeoJSON or CSV?

How do you convert a JSON file to a GeoJSON file or csv. I have a JSON file with lat lon information, but how can I can convert this file to GeoJSON or csv. I have found some online tools to convert ...