GeoJSON is a geospatial data interchange format based on JavaScript Object Notation (JSON)

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Make polygon from area not covered by loaded polygons (like invert selection)

See screenshot, from geojson.io, with a geojson file loaded: So how do we make a polygon out of the blank area? Looking for a way which doesn't involve manually copying selected sequences of co-...
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1answer
307 views

Converting OpenStreetMaps PBF to geojson with geocoding

I am able to convert PBF to geojson, but I lack the additional attributes like state, country, city, suburb, type of business etc which is offered by geocoding service like Nominatim. The geojson ...
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2answers
137 views

Problem loading GeoJSON file on geojson.io

I am newbie in GeoJSON file. I am having difficulty to load my GeoJSON file on geojson.io. Here is my GeoJSON file : https://gist.github.com/anonymous/0abb8f926977d577b52d. The source file is from : ...
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1answer
1k views

How to get GeoJSON properties to appear in popup on feature click in Openlayers3?

I have a map with a base layer and a geojson cluster layer. I want to be able to click an individual feature on the map and have the contents of the properties be displayed in a popup. I currently ...
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1answer
39 views

GeoJSON not being shown

I was trying to add a GeoJSON feature implementing leadlet, but with no avail. Cannot figure out what is going on? <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-...
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1answer
231 views

GeoJSON and OSM layers with different projection

I have a GeoJSON from NaturalEarth for world state boundaries and I want to display it with only without backgroung. But also, I want to add a OSM layer as another baselayer option. The code I am ...
3
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1answer
152 views

How do I produce a GeoJSON with 1 point at a certain lon/lat?

I need to create a GeoJSON string, which contains exactly one point at lon/lat 132.159633, 43.350116. I'm trying to use GeoTools 12-RC1 for that. Let's say I have following method, which is supposed ...
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0answers
420 views

Filter geoJSON layer after it has been loaded

I'm declaring and defining a geoJSON layer first, like: var layer1 = L.geoJson(null, { onEachFeature: function(feature, layer) { ... } }); ..and then loading a CSV into it, like: omnivore....
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1answer
135 views

Reusing tiles between zoom levels of Leaflet?

I have a Leaflet map with a GeoJSON Tile Layer and a custom backend for serving geoJSON tiles. The geometries returned from the backend are simplified depending on the zoom level, but within certain ...
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2answers
2k views

Methods for importing GeoJSON feature collection into ArcMap?

I have a GeoJSON file containing a feature collection, with the structure/format validated by http://geojsonlint.com/. What do people recommend as the best way to import this into ArcMap? I have ...
2
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0answers
109 views

Leaflet with GeoJSON Tiles and a Partitioned Datastore

I'm looking at displaying a frequently updated (potentially thousands of points per second) global dataset of locations on a tiled slippy map. Functionally I'm just going to be putting a marker down ...
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1answer
43 views

Rectangle Appears Distorted on Map

When displaying two features, a polygon a (see geoJSON) and its minimum bounding rectangle b (see geoJSON), I get the following result when viewing on geojson.io: The minimum bounding rectangle ...
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0answers
63 views

Why does R(gdal) mangle data when converting to geojson?

I've encountered issues with projections in .geojson files created by rgdal, but I never thought it would destroy my data, until I tried this (reproducible example): downloader::download("http://...
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0answers
143 views

Is there limit on size of GeoJSON files that can be handled by QGIS? [closed]

I'm trying to load a GeoJSON file with about 5K features in QGIS, and it fails, saying Invalid Data Source without further details. If I remove features down to 1K, it works. Is there a limit on the ...
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1answer
168 views

No output when rendering GeoJSON using Leaflet() package in RShiny

I am creating a Rshiny interface on that can take in the user input when a user click on a point on the map, query the user's selection from postgresql and return another map layer. The package I am ...
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2answers
278 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: https://...
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1answer
197 views

mapbox overlay data

I have loaded my geojson into Mapbox Studio sources and then uploaded it to Mapbox. Now I see my upload under my Data tab on mapbox.com. How do I overlay that Data on my map using the Mapbox ...
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1answer
1k views

Loading GeoJSON data into an array with OpenLayers 3?

First off I'm using OL 3.6 with no additional plugins. Pretty simple question that I thought would have been asked already/would have been much more readily available, is there a way to store points ...
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1answer
226 views

covert a shape file to geojson

Is there any method in PHP to covert a Shapefile to GeoJson ? I need to upload Shapefile and convert it to PostgreSQL table. I tried PHP exec(), but it didn't work. Please help me
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0answers
172 views

Help serializing a postGIS query to geojson

I have a query which I would like to serialize to geoJSON: select article_title, pub_date, city, geom from article, location where article.id = location.id; I can serialize the geom field easily ...
5
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1answer
1k views

Leaflet JS add GeoJSON shape as a hole in a polygon

I have a dataset which already contains geojson. I can add it to my map with the following line of code. L.geoJson(data.geojson).addTo(map); And I get this But I want to achieve this, where the ...
4
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1answer
155 views

Truly lossless TopoJSON / keep all coordinates in TopoJSON

I'm displaying GPX traces on a Leaflet map. I'm using TopoJSON to drastically reduce file size, which works pretty well. My problem is the following : I want to be able to display altitude and ...
2
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1answer
173 views

How can I clean/fix polygons in a Node.js application?

I am working on a simple Node.js application where users can walk around an area with a mobile device using GPS. This track is stored as a Polygon, but sometimes (due to inaccurate GPS signals or ...
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0answers
79 views

Telerik ajax RadMap

I am using telerik RadMap with client side binding in the OnInitialize client event. Copied from the examples: function OnInitialize(sender, args) { var originalOptions = args.get_options(); ...
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0answers
51 views

Publishing Linked Datasets Format [closed]

This past summer for research I was working on linking the NOAA Rivers Database (http://water.weather.gov/ahps/forecasts.php), The National Atlas Lake Database, and the the USBGN datasets so that ...
3
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1answer
246 views

Is there a way to reduce tile processing from Openlayers 3 when user pan & zoom a lot?

I have 2 overlays with local tiles (xyz) on my map. When the user zoom in / out and pan the map intentionally a lot, the app becomes very slow because OL tries to render all the tiles it was requested ...
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1answer
495 views

Plotting GeoJSON data on map using ArcGIS API for JavaScript?

We are developing the portal in which we are using Arcgis javascript APIs.The requirement in our project is one of the weather provider is going to publish the webservice which will return the weather ...
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1answer
423 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 ...
0
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1answer
309 views

Convert Leaflet WMS layer to Leaflet GeoJSON layer

Using the Leaflet API I am adding a WMS layer through the L.tilelayer.WMS feature. This feature includes only a certain amount of options such as 'layers','crs','style' etc. Through the Leaflet ...
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3answers
566 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 this:...
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1answer
253 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 ...
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2answers
388 views

How to reduce large dataset for processing by Tippecanoe and upload to Mapbox

I'm a masters student at the University of Washington without any background in geo, so if this question seems naive or unclear, I apologize. Please let me know if I can add any information for ...
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0answers
662 views

OL3 bbox strategy on geoJSON vector layer?

I try to improve my current OL-3 webmap to load less payload using the bbox strategy. So I altered my code similar to the bbox examples out there: overlayGroup.getLayers().extend([ new ol.layer....
2
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1answer
407 views

parse geoJSON using bounding box and Openlayers 3

I have used Openlayers 3 to give me a bounding box extent and then make a WFS call to Geoserver using those extents and returning a geoJSON and it has worked perfectly, giving me the features within ...
0
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1answer
46 views

OpenLayers doesn't display US Census-based GeoJSON Layer

I'm getting started with OpenLayers and all was going well until I tried to use my own GeoJSON file. I started with the Cartographic Boundary Shapefiles - Counties from the Census website, loaded it ...
0
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1answer
105 views

Where can I find world map shapefiles/GEOJSONs/KMLs for 1950-2015?

I'm looking for world maps showing countries from 1950-2015. Are there shapefiles, KMLs or GEOJSON files of these?
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1answer
39 views

use a global geoJson layer in leaflet

i´m using getJSON to draw points in leaflet, this is the code: function cargarpapes(movibles){ $.getJSON("papeleras1.php", function(data) { papesjson = L.geoJson(data, { ...
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1answer
247 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 ...
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1answer
727 views

Leaflet map - custom markers from CSV and referring to CSV / GeoJSON marker properties?

I run a non-profit online resource called the Megalithic Portal and have created a Leaflet map that uses Leaflet.geoCSV to load in points from a CSV file github.com/joker-x/Leaflet.geoCSV To see ...
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1answer
750 views

GeoJson and D3.js multipolygon

I have this geometric shape file, so no map of a city. I store the two Shapefiles in a GIS database as a geometric form. Now, I want to visualize the geojson data. I created the GeoJson data ...
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0answers
52 views

Cannot draw geometery on WorldWind

I'm trying to draw my geometery on worldwind but it keeps saying WARNING: Unspecified coordinate system and draws a default blue line in the middle of nowhere. The procedure is that I populate ...
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1answer
203 views

Function to merge geojson and csv data in R

I have been using merge() to merge my geojson file with csv data in R. My codes are as follows: map@data <- merge(map@data, csvdata, by.x="ID", by.y="ID") However, after exporting the geojson ...
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2answers
1k views

How to store a drawn feature in OpenLayers?

I have found a draw tool in OpenLayers-3 which allows us to draw on a map (see http://openlayers.org/en/v3.2.0/examples/draw-features.html). Is there an API in openlayers to store the drawn feature in ...
0
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1answer
78 views

How to update an existing GeoJSON with Fiona

With the code below I can create a new GeoJSON and add data to it: data =[(LINESTRING (-98.98234 19.38234, -98.990341 19.342345, -98.992449 19.378621, -98.991299 19.378233, -98.992349999 19.377381), ...
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1answer
172 views

Using CartoDB to change projection of maps - then exporting as SVG

This seems like a fairly simple question, but I've looked everywhere for the answer and can't find it. I've imported geoJSON UK constituency data into CartoDB and it looks great. I now want to export ...
2
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1answer
331 views

How to efficiently use a Postgres DB with Python

I have a Postgres DB with a lot of lines that are too long and so now I want to split those lines into smaller ones. This is why I started writing a little python script for that job. Basically it ...
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1answer
580 views

How can I export a GeoJSON file from R?

The write. function allows one to export a JSON file, but it does not seem to work for a GeoJSON file. This is the code i ran: write(map,"Map Layer2.GeoJSON") and this was the error produced: ...
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1answer
71 views

How to Convert db.ListProperty(GeoPt) to GeoJSON Polygon

My Python Google App Engine (no tag?) app has a datastore model of an Area of Interest, simplified as import geojson class AreaOfInterest(db.Model): name = db.StringProperty(required=True) #...
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1answer
1k 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 ...
0
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1answer
193 views

How to protect the loaded json file name and location using html5 and javascript?

The data of markers (not the map) is stored in a json/csv/js file. We want to show all data as markers on the map. But how to protect the raw data file from public access? Following the example on ...