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

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453 views

How to extract style data from DXF when converting to geoJSON

I am using ogr2ogr (GDAL) to convert DXF files (from autoCAD) to geoJSONS for usage inside Leaflet.js The issue is that a lot of information, like line stroke size and colors are not kept during the ...
0
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1answer
650 views

How to use leaflet-search for a geojson feature property?

I'm trying to use the leaflet-search plugin to search for a specific geojson property (i.e. 'Name'). The trick part of this is I want to perform a search on a Geojson file thats loaded in via the ...
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0answers
34 views

Accessing Topojson features

I am having trouble with accessing the "density" property of my TopoJSON file. Basically I want to change the density property or add another property named "metric" in my properties and make the ...
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0answers
109 views

Save JSON from Openlayers using AJAX

I am trying to build a web app where users can use OpenLayers to draw features and then save them either as a download or write to a file on the server which I can collect when I need it. I am happy ...
0
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1answer
275 views

Get GeoJson feature by ID and zoom on entity

I have got a leaflet map with Geojson layers : I use jquery Autocomplete to search an entity by name or id, I have no problem with that. I need your help because I'm not able to refer to a specific ...
6
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105 views

GeoJson structure

I currently designing a table/document database structure and use GeoJson to store points and routes. Currently I choose MongoDb, I will consider PostGIS later. I want to store route info for public ...
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2answers
565 views

How can I represent Time in GeoJSON?

I'm modelling a bus route as a series of waypoints. Most of these waypoints have just a latitude and a longitude and represent points along a road. However, when the bus gets to a bus stop, the ...
3
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1answer
338 views

D3 javascript and GeoJSON: lines in Stockholm map very strange

All the code and shapefiles that I'm using are available in this GitHub repo. I'm trying to draw a map of Stockholm with D3. The shapefile looks ok in QGIS: However, drawing the GeoJSON produces ...
3
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1answer
480 views

cannot convert shapefile into GeoJSON

I have downloaded a shapefile of Stockholm (files on GitHub). I'm trying to convert the shapefiles to GeoJSON with the ogr2ogr command line tool. It does not work with the following error: Export ...
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1answer
98 views

Can you display data from a csv (or other file format) onto a GeoJSON popup?

All, I'm trying to display data from another file such as a csv into a GeoJSON popup window. So far I know I can match the data using a nested for loop with a common id between the two files, but I'm ...
0
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1answer
230 views

Leaflet GeoJSON style function feature only colors one GeoJSON feature

I need to style every feature differently that I pull from a GeoJSON file. However this anonymous style function only changes the style on the first feature it comes across and stops. I am new to ...
0
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1answer
498 views

Leaflet Marker Cluster from GeoJSON

I've created marker cluster in this example and now I want to show the same thing with data from GeoJSON, but it doesn't work. I'm trying to reproduce same situation in this example, but marker ...
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4answers
2k views

Methods to Convert .SVG File to GeoJSON

Question How do I convert an SVG file to GeoJSON format? Desired Outcome: I want to make a choropleth map using something like D3.js, or any of the other libraries out there. Challenge: I have an ...
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1answer
44 views

Certain polygons not obeying JavaScript style rules?

http://catalinagis.org/ownership You can see that some of the parcels don't follow the fill style rules (opacity: 0.5) even though the same style rule applies to all polygons in the data. This ...
2
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0answers
105 views

Different Leaflet fillcolors for different layers

I have a leaflet map set up with two layers and I want them to use different colorization functions to color the choropleth shapes. My shapes are set up in layers like this: var povertyLayer = L....
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0answers
72 views

show polygon from database in browser in geodjango

I tried to retrieve the polygon which I saved into postgis database. (all polygons) Here is my code: models.py from django.contrib.gis.db import models class MyMap(models.Model): name = models....
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1answer
93 views

Shared edge between two geojson polygons

I am interested in getting the coordinates of a shared edge (if exists) between two geojson polygons. I am (currently) using turfjs and geojson-equality libraries I tried this but I consider it quite ...
3
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1answer
392 views

geopandas: can't save geojson

My task is to upload geojson, add data from corresponding csv, drop some columns, then save it back to geojson. However, after I did everything, added csv data (gj.join(df) ), etc, I can't save it ...
2
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1answer
313 views

Best approach for indexing a SQLite database containing geoJSON spatial objects?

I'm building an iOS application for public release. My architecture currently includes Mapbox, Parse, geoJSON and SQLite for the local store. The app will store spatial objects locally as a string in ...
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88 views

get the outline of a polygon

I have geojson data that draws shapes similar to the following: I wanted to know if there are any operations that can give me the geojson which represents the outline of these shapes represented by ...
1
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1answer
92 views

How to pass custom data in GeoJSON point?

I have an application, which creates a GeoJSON stream on the server, which is then rendered on the client (using CesiumJS). GeoJSON is created using GeoTools. I want to pass some custom data to the ...
1
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1answer
209 views

ogr2ogr problem mapping shapefile to geojson ETRS89 / Poland CS92

I'm trying to convert official boundaries of administrative regions of Poland from official governmental site (codgik.gov.pl). I want to use those data because they are official ones, and set contains ...
-1
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1answer
304 views

How to filter polygons in Leaflet using range slider

I have a map I'm working on with Leaflet that displays a choropleth of zip code-level data. One piece of functionality I would like to add is to allow users to use a range slider to filter out ...
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1answer
92 views

mapbox geojson + leaflet + custom markers [duplicate]

In the geojson file the following can be found for a marker (coming from mapbox geojson) "marker-color":"#1087bf","marker-symbol":"monument"} I would like to find a solution so monument will be ...
1
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1answer
36 views

Tile server return empty features

I have successfully installed tilestache. I also has succesfully add a layer using shapefile from here. But when I tried to use my own shapefile, the server always return empty featurecollection. I ...
2
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1answer
811 views

Upload KML / GML / GeoJson to Geoserver through Rest API

What is the best option, if any, to upload a vector format like GeoJson, and or GML to Geoserver? The environment from which to upload will be a client web-application, so i cannot use curl. In the ...
3
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1answer
143 views

Leaflet + GeoJson = problem with style

I got my first leaflet + geojson project partly working! (even the popup with content from the geojson file!) but I still have a problem with style the geojson (export from mapbox) file has point, ...
2
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1answer
108 views

How can I export a shapefile from PostGIS with a GeoJSON query?

I tried to export a shapefile from my PostGIS installation using pgsql2shp as follow pgsql2shp -f tiles.shp -h <host> -u <user> -P <pass> <database> "SELECT id, the_geom FROM &...
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0answers
174 views

Change label size in OpenLayers 3 from QGIS Plugin output

I am working on OpenLayers 3 at the moment and my aim is to provide an offline map. At the moment I am trying to get GeoJSON files offline. For that I am using the QGIS Plugin that exports the ...
0
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1answer
116 views

Have to click twice to open popup leaflet

I am trying to make a map in which a marker can be clicked and a popup opens up with some information. I have successfully done all of that however my first click on any of the markers result in the ...
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0answers
166 views

PostGIS dijkstra routing - specifying source and target as bigint instead of int4?

I'm currently working on a problem where I have to use PostGIS's pgr_dijkstra to calculate the shortest route from a starting point to a destination, and then use ST_AsGeoJSON to convert the route to ...
1
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3answers
250 views

Load a really big geojson to a feature layer in leaflet

I have this geojson file(about 60mB) that contains the administrative area boundaries. I want to make a chloropleth and give color based on each geometry properties value and add it to the ...
0
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1answer
59 views

Getting GeoJSON formatted properly for Leaflet?

I am trying to get data put on a leaflet map that I have set up. I am following this tutorial: https://www.youtube.com/watch?v=fDfkjx-VhLI I have all of the html, css and js scripts up and running, ...
0
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1answer
53 views

Getting uploaded shapefile into geometry field on PostGIS table?

I am working with a PHP web application where we have a user submitting a ShapeFile. I am able to convert that ShapeFile then to a format of geojson. What I am wondering now is how I can best ...
4
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2answers
305 views

Big data sets and challenges using the Leaflet client

I am using Leaflet to present around 90.000 data points. My test code is generated using the plugin QGIS2leaf in QGIS 10.10.1. I am using clustering and reviewing the code I can see that this is "...
1
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1answer
373 views

How to SELECT all points within a GeoJSON polygon in PostGIS

I have a GeoJSON polygon, and a table with lots of points. I want to SELECT all points that are within an arbitrary GeoJSON polygon. How can I do that with PostGIS SQL?
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1answer
104 views

Leaflet map.locate, very long response time

I'm using leafletknn to search the nearest geojson element from the user location. I add a map.locate method that zoom to the user location. The response time is longer than when I directly use it... ...
5
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1answer
546 views

Wrapping vector tiles generated by geojson-vt

I've followed the example in geojson-vt, and am able to generate vector tiles from my geoJson source. However, I can't read these tiles with mapbox-gl-js or Leaflet.MapboxVectorTile because I don't ...
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0answers
240 views

Can I use GeoJSON GeometryCollection in QGIS?

I want to create a GeoJSON that contains multiple geometries to be used in QGis later on. Now I red through the specs here: http://geojson.org/geojson-spec.html#geometrycollection When I simply copy ...
0
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1answer
804 views

Ol3, dynamic CQL for WFS layer (GeoJSON) from Geoserver

My map in Openlayers (Ol3) contains a WFS layer with GeoJSON format from Geoserver. My intention is to use CQL filters that can be applied by the user through comboboxes next to the map. The CQL ...
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0answers
271 views

Dynamic data loading in openlayers 3 using Geojson

I am able to load the multiple wfs features using GeoJSON, but now i need to load the features dynamically instead of loading randomly Here is my code // First WFS Layer var url = 'http://localhost:...
0
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2answers
219 views

Administrative level GeoJSON Polygons for African Countries

I'm very new to GIS and I have spent the last few days trying to find some kind of database with the aforementioned polygons with no luck. The purpose is simply to label a location at district level ...
1
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1answer
154 views

Using GEOJSON offline in QGIS

I have some GEOJSON-Layers in my QGIS-project. The problem is, that when I zoom in or out, it takes very long to built up the window again. That's because it always loads it from the server. But I don'...
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2answers
354 views

leaflet / change a geojson divicon html

I have a geojson layer with a divIcon and now i want to change it. i have tried whit seticon but it does not work. How could i do it? This is what I am trying: papesjson.eachLayer(function(layer){ ...
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0answers
21 views

Editing geojson without separating segment endpoints

I have a few maps of city sidewalks in Geojson format which I need to manually edit to make corrections. However, in the tools that I've tried, geojson.io and QGIS, segments that share an endpoint are ...
1
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1answer
75 views

gdal_polygonize with World File

I have this image that I want to convert it to GeoJSON. And I have this World File: 0.0388048118 0.0 0.0 -0.0387897595 697054.11331 4458020.56656 When I try to run the gdal_polygonize command ...
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1answer
464 views

Points of LinearRing do not form a closed linestring - one point intersection

I'm trying to index geojson data using elasticsearch. There is some kind of polygons that causing an error: "Points of LinearRing do not form a closed linestring". Looks like it happens because ...
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0answers
25 views

geoJSON isn´t showed

I am working in Openlayers 3. I have been trying to show a *.json (GeoJSON) layer but it doesn´t work and I don´t know why. debug tool shows this message: My code is: Vector layer ...
2
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0answers
74 views

What is the most suitable way to get the boundary of a state or a country or the whole world dynamically?

I am working on a project where I have to create filled map charts based on the data client has provided. The data has latitude and longitude information. Based on the selected level (city or state or ...
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0answers
350 views

mongodb $geoIntersects query for all documents who's polygon contains a point. no results?

I am trying to find all documents for a point that is within a document's polygon. using mongoTemplate to set up my geo index. mongoTemplate.indexOps(Boundary.class).ensureIndex( new ...