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

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2
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1answer
218 views

Leaflet snap circle draw to marker

I am looking for ideas/libraries that enable snapping when I create a circle with leaflet draw. There is the libaray Leaflet snap, that enables snapping of draggable markers to polylines and other ...
2
votes
1answer
187 views

Cache geodjango query with bounding box filter

Im using geodjango (postgis) to retrieve points contained inside a bounding box (made by leafletjs), it works so nice, but now I want to cache this query. A tipical query is one like this: ...
2
votes
2answers
248 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 ...
2
votes
1answer
278 views

SVG control not visible on top of Leaflet.js

I'm using Leaflet 0.7.1 and want to draw a radial menu (like openstreetmap's iD editor) on top using d3. Some examples I found use Leaflet's overlayPane to append the svg element to: var ...
2
votes
1answer
402 views

proj.4 definition for Moscow GCS_Bessel_1841 to WGS84 convertion

I'm developing an app which should show a map using Leaflet framework but i have no luck as the coordinate system on the map server differs from the one used by Leaflet. As a map server i use ...
2
votes
2answers
825 views

Leaflet: Container coordinates vs Layer coordinates?

What is the difference between map container coordinates and layer coordinates? From what I gathered, the map container coordinates are always relative to the map viewport, and while layer ...
2
votes
1answer
407 views

Programmatic conversion between GML and GeoJSON

I am modifying a .Net (C#, MSSQL) system to add some geography that I'd like to display on a leaflet map. I had originally expected to save GeoJSON directly into text strings in the DB, but after ...
2
votes
2answers
354 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 ...
2
votes
1answer
2k views

Leaflet - how can I call custom js after drawing polygon?

I want to draw a polygon on a leaflet map and afterwards send it to the DB and retrieve all objects that intersect that polygon. In Openlayers I did it by using custom function in "featureAdded:" ...
2
votes
2answers
362 views

How to visualize pgRouting layer in leaflet?

I have completed all the queries of the of pgRouting tutorial by Underdark where visualization was done with the help of RT SQL Layer Plugin. As I am using Windows OS I have no access of that tool. ...
2
votes
1answer
610 views

formatting geojson from postgis data using node.js

I am trying to build a GeoJSON object from a SQL query to some GIS point data in a postgis postgresql database. A snippet of my node.js app.js is below. As it stands I understand building the type ...
2
votes
1answer
1k views

How to setup leaflet map to display a WMS layer in ESRI:102012 projection?

I have a WMS server that serves layers in ESRI:102012 projection. http://spatialreference.org/ref/esri/102012/ It accepts GetMap requests with srs=EPSG:102012 parameter. My goal is to display a map ...
2
votes
1answer
938 views

LEAFLET - store and retrieve user markers & diagrams from database

I am intending to use leaflet in order to build a "microscope laboratory" for my institute's medical school. I am quite new to javascript, ajax and json technologies so I would like to have some ...
2
votes
1answer
42 views

Leafletjs get latlng center position of polyline

After drawing a polyline, I would like to draw a circle from the center of this line whose radius encompasses the entire line. For polyline's that have more than 2 points I can crudely get the center ...
2
votes
1answer
46 views

How to display UtfGrid info

first off sorry if this question have been asked, I have been looking for an answer for some time now but cant find any solution. I have created a .mbtiles file with Tilemill, extracted the .png and ...
2
votes
1answer
84 views

Saving Leaflet Maps in Database

I have a webpage with a Leaflet Map, I can add markers,filter markers and so on. My question is that how can I save it? Load the Map Add some Markers on the Map (Optional) Filter the Markers on ...
2
votes
1answer
136 views

leaflet marker-cluster JSONP geoserver

I hope I can get same help from here. I started to put together a leaflet map, please see here: http://gis.xyz/leaflet2.html I want to show my postgis point (uk based) features on this map with ...
2
votes
1answer
97 views

openlayers leaflet and popup

I am working on a map mixing openlayers and leaflet librairies (it is possible, correct ?). I am such a beginner that, after lots of readings, I thought creating popups was less difficult for me ...
2
votes
1answer
160 views

Easy way to render TileMill tiles in retina mode with Leaflet?

I have a few quick little map websites that run straight off TileMill, without pre-exporting. They usually have code like this: L.tileLayer('http://example.com:20008/tile/MyMap/{z}/{x}/{y}.png', ...
2
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1answer
205 views

Make Leaflet Map Background Transparent

How can i make the background of the leaflet map transparent. I see opacity controls from the layers, but not the map background. Should the be changed just with plain CSS? Thanks
2
votes
1answer
184 views

How does one use leaflet layergroups with CartoDB layers?

I'm trying to use leaflet layergroups with a cartodb layer, ala: http://leafletjs.com/reference.html#layergroup but haven't been able to successfully do it. This is what I have so far: var map = ...
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 ...
2
votes
1answer
1k views

Make sidebar div active on Marker click (and vice versa)?

What's the best way to change an element to active when you click on a marker. For example, when you click on a marker on a Leaflet map, how to make it so the sidebar element that's related to it ...
2
votes
3answers
124 views

Start-Marker from geojson polyline

i have a map with some walking- and bike-routes and popups with a few details and a picture. Now i want to set a marker on the first vertex of a geojson polyline, but i cant find out how. Btw. i´m ...
2
votes
1answer
534 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" /> ...
2
votes
1answer
185 views

Leaflet.js and CartoDB.js event conflict

Little problem here. I’ve got a layer from a CartoDB viz that I’m listening to the featureclick event. When a feature is clicked I highlight it by applying cartoCss. However, I want to unhighlight it ...
2
votes
1answer
155 views

Super large scale maps with Leaflet, how?

I have a map/architectural drawing of two floors of a huge building with a lot of rooms. Now I'd like to make an interactive slippy map using preferably Leaflet showing all the rooms and use ...
2
votes
1answer
631 views

How do I set the fillcolor of polygons in Leaflet.js dynamically?

I'm using the interactive chloropath example for leaflet.js I figured out how to make each of my polygons add a running tally of values to the bottom of the page after each polygon is clicked. Upon ...
2
votes
2answers
1k views

How do I modify features during runtime, in a GeoJSON feature group on Leaflet?

I have added some GeoJSON to my Leaflet powered map as below. (Altered version) var array_of_layers = L.layerGroup([]); var styleholder = []; var belgium_style = {color: "#d3e46f"}; var bosnia_style ...
2
votes
1answer
195 views

How to control the order of appearance of markers using leaflet?

I'm plotting out markers from GeoJSON files onto my Leaflet map. Some of these markers overlap so now I want to control the order of appearance of these markers so that one type always sits above the ...
2
votes
2answers
673 views

Can I use leaflet to access a WMS service published as an OpenLayers javascript API?

I would like to add this layer to a site I'm working on that uses leaflet: http://116.240.195.134/vicmapapi/UserGuide.jsp The API itself is a javascript file based on OpenLayers: ...
2
votes
1answer
109 views

advice on browsing multiple points with leaflet - query only the points in the viewport

This a very basic question, but I don´t quite know where to start I have a postgis table with aproximately 15.000 points hosted on CartoDB And I'm developing an application that should let the user ...
2
votes
2answers
916 views

How to determine intersection between geojson feature and given coordinates?

I'm overlaying a leaflet map with features of geojson, fetched with d3 and added as SVG elements to the DOM. My geojson contains too many features to render at once, so my goal is to add to the map ...
2
votes
1answer
166 views

Value at a particular spot on Geoserver Heatmap

Geoserver is drawing from a PostGIS database to generate a heatmap using this SLD extension. Leaflet then overlays the heatmap over the base layer. Question: How can you determine the value at a ...
2
votes
1answer
2k views

select two markers & draw line between them in leaflet

I am very much new to leaflet. I have multiple markers plotted on my map in leaflet. now I have to draw line between two markers when I select them. Can any one help in doing this.
2
votes
1answer
359 views

How to create a radius search in Leaflet

My objective is to create a radius search tools using Leaflet API. It will behave like how many POIs within the radius from a given point. Any tutorial or any blog forum link will be helpful to me. ...
2
votes
1answer
636 views

How to render points from CartoDB with Leaflet and Leaflet Vector Layers?

I have a table in CartoDB containing some points. I want to render these points dynamically with Leaflet. There is cartodb.js for such tasks, but it does not support full customization of Tooltips, as ...
2
votes
2answers
987 views

UTM Grid as a Layer with Leaflet

How can I display a UTM Grid as a layer with Leaflet? Search a way to embed a OpenStreetMap map with Leaflet in a website. Particularity. I want to display a UTM Grid as a Layer. In addition, lower ...
2
votes
1answer
651 views

How to keep bound popups from opening on [click]?

I am working on a map application which creates and binds popups on markers and polyline objects. The popups are created and bound lazily, i.e. ad-hoc when a user clicks on a specific object. The ...
2
votes
1answer
710 views

How to preload tiles in Leaflet?

I'm trying to make a user controlled cross-layer animation in Leaflet. I have about 70 tileLayer.wms layers, that need to be preloaded on the map before animation can run. The question is - is there ...
2
votes
2answers
900 views

Leaflet, defining a specific region for a canvas to draw upon

Using leaflet, you can draw on a given map by adding a Canvas layer. Some instructions are given here, http://leaflet.cloudmade.com/reference.html#tilelayer-canvas var canvasTiles = new ...
2
votes
1answer
33 views

Export TileMill project as SVG image with CartoCSS applied to it

I am able to export TileMill project as mbtiles and rendering tiles on map using leaflet which is working fine. But if I export the project as SVG or PNG image the CartoCSS which I have written is not ...
2
votes
0answers
17 views

Is it possible to hatch format railroads in leaflet?

Within mapbox tilemill it is possible to make make rail-roads like this: To achieve this you need to write the following code: Source #railroads { ::line, ::hatch { line-color: #777; } ::line { ...
2
votes
1answer
56 views

Loop through a marker cluster using Leafletjs

I have a variable like this var cubbon = new L.MarkerClusterGroup() then i added many markers to this variable. now i like to create a function() and loop through the variable and find out a marker ...
2
votes
1answer
86 views

JSONP working with Leaflet time slider

I would like to integrate the time slider into a JSONP geoserver. Here is the current code I have http://jsfiddle.net/qcwcrwge/26/ and I would like to use the time slider with a layer called ...
2
votes
1answer
55 views

find inner bounds of a polygon in leaflet

How can I find the inner bounds of a polygon in leaflet? I a want to plot points randomly in polygoon but when I say Layer.getBounds() I get the bounds and I can still plot the markers ...
2
votes
0answers
35 views

Check/uncheck overlays in groupedlayercontrol.js

In a Leaflet-based app I have create several overlays, grouped with leaflet.groupedlayercontrol.js, as shown in this image: Everything works well, but I need to uncheck certain layers, allowing the ...
2
votes
0answers
79 views

Comparing mapping APIs

I am planning to write a thesis about mapping APIs and compare three of them (Google Maps API, Leaflet and OpenLayers) or four, if you consider OL2 and OL3 as different APIs. I am planning to make 3 ...
2
votes
0answers
30 views

What is the best way to handle metadata with TileStache?

When I'm serving up maps and UtfGrids with tileStache I would like to also include some metadata with the layers so that my leaflet application can understand the context of the layer. For example: ...
2
votes
1answer
81 views

Most efficient way to use UTM in leaflet

Our server is using UTM internally. We then send a large number of UTM Coordinates to display them in a custom made leaflet layer. First we transform (unproject) them into "normal" geographical ...