An Open-Source JavaScript Library for Mobile-Friendly Interactive Maps

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15
votes
10answers
12k views

How to convert ArcGIS Server JSON to GeoJSON?

I'm creating a web map using Leaflet, and I want to be able to grab feature layers from our ArcServer. I have successfully been able to retrieve a feature class as JSON, but Esri's JSON objects don't ...
7
votes
4answers
12k 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 ...
13
votes
4answers
18k views

How to show a popup on mouse-over, not on click?

Is it possible in Leaflet that popup opens on mouse-over, not on click? This is working for just one marker at a time, but I need it for a bigger number of markers: marker.on('mouseover', ...
2
votes
1answer
977 views

GeoServer Callback Function Undefinded

Any idea why the function loadThis() comes back as undefined? I've tried adding jsonp: false which doesn't help either. The json object is returned properly, I can view it in FireBug, but I can't get ...
47
votes
8answers
9k views

How to create Vector Polygons at the same amazing speeds GISCloud is able to render them?

EDIT (outlining new bounty added): I have added the largest bounty possible to this question in hope of getting a very detailed answer. Your solution should outline a step-by-step guide utilizing open ...
11
votes
2answers
2k views

Understanding web mapping tools [duplicate]

Before I start, this is going to be a general question but with specific cases. I've been trying to understand GIS tools and applications to achieve the following: Build my own basemap Publish the ...
4
votes
1answer
6k views

How do I get GeoJSON data from GeoServer into show up on my Leaflet map?

I'm trying to create a simple "Green" map for my city. The idea being that it is a website with a map and layers you can turn on and off. I am serving the data through GeoServer and am using GeoJOSN ...
6
votes
1answer
7k views

How to change Leaflet Map panes layering order (z-index)?

Leaflet maintains that the Map panes elements contain all layers added to the map. The difference between many of the Map panes is strictly the z-index order of layering. I would like to use a ...
5
votes
1answer
3k views

leaflet geojson coordinate problem

I just started to play with leflet/geojson a little. But my coordinates are not rendered properly and I have no clue what is going on. My coordinates are: 52.23943, 4.97599. They work correct with ...
37
votes
4answers
22k views

Should I use OpenLayers or Leaflet?

I was debating with one of my collegues on OpenLayers v/s Leaflet. I made a point that OpenLayers is much better API if we wish to build a project, where you need direct connectivity to the Geoserver ...
9
votes
2answers
7k views

How to get Leaflet interactivity from Geoserver WMS?

I have geoserver serving shapefiles as a WMS into Leaflet. I'd like to add interativity that shows a popup with WMS attributes in the Leaflet map when the user hovers over or clicks on a WMS feature. ...
4
votes
3answers
15k views

How to get the Lat, Long of a clicked location using Leaflet API?

I am using OSM with leaflet API. Now i want to get the lat and long of a clicked location. I meant something similar to this. ex: http://openlayers.org/dev/examples/click.html ...
3
votes
1answer
6k views

Combine Leaflet with Geoserver WMS map

I'm not very skilled within the GIS world, however, I would like to know if it's possible to use this map: ...
2
votes
2answers
144 views

great circles in QGIS and export in 3857 webmap

My plan is to visualize great circles in a leaflet webmap. So coming from this great postgis article and R version I thought it would work like this in QGIS: create line from two points, store ...
1
vote
1answer
1k views

How to get correct format of coordinates for export to geojson from QGIS?

I've created a custom map in QGIS with a few shapefiles. I'm using leaflet.js to render the map and the shapefile points and everything lines up correctly. The CRS is set to 4326. When I export the ...
4
votes
1answer
189 views

Day and night zone layer for Leaflet

I'm working with Leaflet and I'd like to show the day and night zones adding a dynamic layer to my map. I was thinking to add a static layer with some transparency and make it move every x minutes but ...
2
votes
2answers
824 views

Viewing map tiles from Maperitive in leaflet or openlayers

I generated tiles in Maperative. Created following html file: <html> <head> <meta charset="utf-8" /> <link rel="stylesheet" href="leaflet/leaflet.css" /> ...
10
votes
2answers
14k views

Adding/Removing Leaflet GeoJSON layers

I'm trying to show different GeoJSON layers at different zoom layers using the Leaflet API. I can load and display all three layers at once (though I don't actually want them all to show at once). I ...
9
votes
2answers
2k views

What is the most common way of displaying geodata from Postgis on Leaflet?

For example, in my database I've some points with geographic coordinates. I want to display them on Leaflet JS layer. Which instruments should I use? Maybe there is some API...
13
votes
7answers
1k views

Comparing two maps with nice web interface?

Is it possible in Leaflet or OpenLayers to compare two maps with a bar to slide between the two? Examples include: ...
8
votes
1answer
12k views

How to Add/Remove Legend with Leaflet Layers Control?

I have two overlays http://02d0c8c.netsolhost.com/dev/lcb_census_layers3.html that can be turned on and off with a Layer Control. I’d like the legend for each layer to turn on/off along with the ...
6
votes
1answer
4k views

Offline SLIPPY Map (Tiles) Database for Leaflet

How can create an offline cache of a large number of SLIPPY tile (PNG, 256x256) inside a web browser and then display them from that offline cache. For example, can one use HTML5 IndexedDB as an ...
2
votes
3answers
5k views

Getting WFS data from Geoserver into leaflet

I'm trying to use a ajax call to load WFS data from geoserver into a GeoJson layer in leaflet. When I do the following message in the console: XMLHttpRequest cannot load ...
6
votes
1answer
5k 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 ...
4
votes
1answer
632 views

What is the best practice to show GPS movements on map (Openlayers or Leaflet) using DB and Geoserver?

I have GPS unit which update the DB with Points every 10 seconds. I want to show the position in real time (as much as I can) on map using OL or Leaflet. What I did is serving the Point as Layer in ...
3
votes
3answers
2k views

How to add a polygon from PostGIS ST_AsGeoJSON into Leaflet?

I try to use the following function to add polygons to my Leaflet map. function polygon(geojson) { alert(geojson); // alert for testing layer = L.geoJson(geojson); layer.addTo(map); } ...
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 ...
4
votes
5answers
3k views

How to get a Leaflet app with a big GeoJSON file to work on mobile devices?

I have a leaflet app which displays a GeoJSON file as a layer. It works fine in the web browser. On the mobile browser it starts up, but quits after panning around on the map. I think the reason for ...
3
votes
3answers
634 views

Offline Map Service with Mapnik and Leaflet

I'm relatively new to GIS, so I hope my asking doesn't appear to be ignorant in any way. I currently work on an offline map service solution for usage in areas without internet connection. For that ...
3
votes
1answer
2k views

Which plugin can draw topoJson right within Leaflet without conversion?

I already have asked how to reduce file size and increase performance for publishing spatial data on the web using Leaflet, here. A conversion to TopoJSON has reduced the file size by approximately ...
2
votes
2answers
380 views

where to host private cartodb/leaflet web app

I am looking for opinions on where to host my cartodb/leaflet map site. It needs to be private with authorized users and have a document management system. So, I was thinking sharepoint online 2013 so ...
4
votes
2answers
893 views

binding nested arrays as geojson popups in leaflet

I am struggling with geojson popups in leaflet.js I have nested arrays as properties for my features - an example would be counts of fish caught at a location (not my actual project data!) ...
3
votes
2answers
775 views

'Home' button leaflet map

is there a possibility to have a kind of home button on my map which will zoom to my initial map view or a specific defined position, resp.? Any help welcome! Thanks
3
votes
3answers
2k views

gdal2tiles.py generates wrong tiles / MapTiler the right ones

I'm trying to generate tiles with gdal2tiles.py and the resulting tiles are stored as 18/132639/164219. If I do the same thing with MapTiler (the GUI variant of gdal2tiles) the tile result is ...
3
votes
2answers
2k views

Leaflet proj4leaflet with multiple projections

I am looking at having both EPSG4326 tiles and EPSG3857(cloudmade) tiles on a single map (but separate layers). I have been looking at the proj4leaflet plugin, and it "appears" to me that this might ...
3
votes
1answer
5k views

How to set up a layer control using Leaflet?

I have been working on a mapping application using Leaflet. I am using a WMS on Geoserver to get my layers, which are overlaid on a cloudmade basemap. I tried to use the layer control on my map by ...
2
votes
2answers
568 views

How does Leaflet layer ordering work with CartoDB layers?

All, I'm trying to figure out how Leaflet layer ordering works when you have layers coming from CartoDB. I have a map with 1 polygon layer (cartodb), 3 point layers (cartodb), 1 basemap layer ...
2
votes
2answers
955 views

Leaflet.geojson webpage performance out of hand, how to convert to .png?

I exported some countries as a single .geojson file. The file includes every country's vertices and coordinates, as that's what a .geojson is ─ a vector file. Thing is, there are about 20 countries ...
1
vote
3answers
422 views

How to load geojson vector tiles from mapbox id?

I have some data hosted on mapbox and I'm trying to load it as tiled geojson into Leaflet from its mapbox id (I just want to get plain geojson, I'm not trying to render it). How can I achieved that? ...
1
vote
2answers
1k views

How to add Geoserver WFS to Leaflet JS Application

I have a PostGIS database and have successfully consumed a table into GeoServer and published a WFS. Are there REST endpoints available for these WFS' akin to ESRI's feature services? How are ...
1
vote
1answer
625 views

Leaflet Draw - add title to marker or shape?

I am trying to create a participatory mapping site where users can draw pts, lines and polys using Leaflet draw. Is it possible to create a pop window where users can add a title or description of ...
1
vote
1answer
724 views

Reprojecting coordinates and geoJSON in leaflet

I have a Leaflet map in default projection and a wms layer also in default (web mercator) projection. I would like to add polylines and a geoJSON layer to my map, but the coordinates are in EPSG4326. ...
6
votes
2answers
115 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. ...
6
votes
1answer
788 views

What server and API to use for displaying complex polygons with dynamic symbology?

Background I need to interface a map into an existing website which allows the user to query a database and which currently results in a table listing population statistics per county. For example, ...
5
votes
3answers
8k views

How to add text-only labels on Leaflet map with no icon

I'm looking for a way to show text on Leaflet map using markers or anything else without showing any icon. I want to show text only and be able to style and rotate it... Any suggestion? Thanks a lot ...
5
votes
3answers
15k views

How to draw a polyline in Leaflet?

This is my coding I used in Leaflet: var pointA = new L.LatLng(28.635308, 77.22496); var pointB = new L.LatLng(28.984461, 77.70641); var pointList = [pointA, pointB]; var ...
3
votes
2answers
397 views

How do you get the nodes of an area in Overpass API in the “right” order?

I use the Overpass API to get the boundary of an OSM relation. I then use the result to display the boundary on a leaflet map. My problem is however, that the nodes are not in the "right order". ...
2
votes
1answer
150 views

L.esri.featureLayer shows up and sometimes not

I'm new to the leaflet/esri subject so please forgive me if it's just a simple question. I wrote my first webmap-app. It uses different sources. The main aim is to show two basemaps hosted by MapBox ...
2
votes
0answers
227 views

Leaflet wms offset on zoom out

I have Leaflet map with base layer (epsg4326) and wms layer of gps point (also epsg4326). I've noticed when I zoom out , the gps point offset to the left. Any idea why it happens ? Here you can see ...
2
votes
2answers
463 views

Can Geoserver return the raster value of a lat/lon point

I have a GeoTIFF published by Geoserver 2.2 and being used by Leaflet via WMS. How can I get Geoserver to return the raster value at a lat/long point? I'm guessing it has to do with using WCS, but ...