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

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1
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2answers
1k views

How to project pixel coordinates in leaflet?

I am trying to create a map based on an image which is 16384x16384 px, but I would also like to add markers at specific locations using pixel coordinates of this given image. I created a tile layer, ...
6
votes
3answers
151 views

How to use Leaflet to efficiently show parts of a massive dataset?

I keep seeing non-GIS web developers running into this problem, and I'm not sure what the solution is. There is some dataset of thousands of items. We want to show a map to the user, with the ...
3
votes
3answers
125 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 ...
0
votes
0answers
35 views

How to use different popup styles in the same leaflet web map for different dynamic map layers

I am very new to javascript, CSS and HTML. I have been playing around with leaflet and have been trying to figure out a way to customize popups for different features in my map. Is there a way to do ...
1
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0answers
53 views

How do I use Proj4Leaflet projections correctly?

I'm loading data layers from a WMS server into a Leaflet map, and I need to give the user a choice of projections. For the WMS server requests, I just need to change the CRS parameter to a different ...
13
votes
9answers
8k 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 ...
3
votes
2answers
169 views

Leaflet geoJson in front of markers in a FeatureGroup

I am loading some markers and json data to a leaflet map. I need to get my json in front of the markers. I have tried placing the markers and json in seperate FeatureGroups and then tried ...
2
votes
0answers
15 views

How do I change polygon opacity using a esri WFS in leaflet?

Note...Solved and here for anyone having this problem...damn simple problem, I had not used a higher case character for fillcolor and fillopacity....they should be fillColor and fillOpacity , it ...
4
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0answers
32 views

Does leaflet.js offer an gutter option just like Openlayers

Currently we are switching from Openlayers to leaflet.js and there is a problem using a WMS layer with leaflet. The WMS being used is Deegree. When a layer is visualised within leaflet there are ...
2
votes
3answers
2k 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 ...
1
vote
2answers
545 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 ...
3
votes
3answers
815 views

Display GeoJSON layer on top a SVG image instead of a map.

I'm very new to GIS, so hope this is the correct place to ask. Not sure if this will even be possible. This is what I want to achieve: In short, I want to display a set of polygons, lines etc. in a ...
1
vote
1answer
36 views

How can I make Leaflet tiles appear in a page? [closed]

I am having trouble with leaflet working, but not displaying any of the background tiles in the page. This one is using the leaflet-rails gem in a Rails app. This is just in an html sample page: ...
2
votes
1answer
33 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
3
votes
2answers
92 views

Disable panning/dragging on leaflet map for div within map

This may be a bit trivial, but does anyone know how to suppress panning when you click and drag over top of a div box embedded within the map itself? Not sure if this question has been asked in ...
3
votes
1answer
60 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
1answer
95 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
63 views

Viewing map tiles generated from Maperitive in leaflet or openlayers

for few days i have been working on developing my own osm tile server. I tried it on linux as well as on windows, no complete success till now. I Have to make tile server on both windows and linux. ...
1
vote
1answer
37 views

layer priority over basemap

Hello I was trying to but together a quick and dirty bing/osm map using leaflet and leaflet plugin. My problem comes in when adding a layer from cartodb.The points do not show and I am not getting ...
0
votes
1answer
57 views

Optimum set up for large data sets such as mobile service coverage maps [closed]

When serving up large data sets such as mobile coverage maps (custom tile) mashed up with MapQuest maps and MapQuest POIs, is there any performance benefit to using shape file VS WMS tile PNGs? Any ...
0
votes
1answer
57 views

fitBounds on points after feature selection

I am trying to follow some of the examples I have found here and in Google Groups about fitBounds for points. Most of the examples are for polygons and don't seem to work for points. I think I've ...
3
votes
1answer
2k views

CloudMade Routing with Leaflet: route is not displayed

I am trying to consume the CloudMade routing API using Leaflet. So far, I have managed to pass points and receive a response, and parse that response into an array of points. The array of points is ...
1
vote
0answers
10 views

using gzipped js files in windows 8 OS

Previously, we were using a private ISP to run our web site. They were using LINUX. We could use js.gz files to serve interactive maps. Now, we have our own server with Windows 8 OS. How we can serve ...
0
votes
1answer
43 views

CartoDB.js SQL API editing geometry

Is there anyway you can allow users to edit the geometry of shapes (e.g. move an existing point) using the CartoDB.js or CartDB SQL API libraries. I realise you can do this directly in the CartoDB ...
5
votes
3answers
181 views

Guidance when to style your features in Tilemill vs. Leaflet?

I've found this generally to be dependent on each project's goals (or what the client wants), but when you have the options, what any rules of thumb or guidelines do use you in a project to determine ...
0
votes
1answer
45 views

Millions of polygons: displaying layers in Leaflet based on location being viewed?

I'm trying to create a map of all parcels in a state. In my state, this is several million parcels. In their current format, they are encoded as topojson and divided up by county. I'd like to show ...
6
votes
3answers
215 views

How to generate image tiles from custom geo data for use with Leaflet

Migrating a webapp from Google Maps API V3 to OSM + Leaflet, which displays custom data that consists of lots of lines and points, on a background map. When this custom data is drawn by Leaflet on ...
2
votes
1answer
24 views

Is it possible to use two layer.bindPopup functions in Leaflet

I have two different layers in a leaflet map. I have one layer in which I would like the popup to return some text from the layer's attributes. They other layer I would like the popup to return an ...
1
vote
2answers
148 views

Is there a Cluster convex hull implementation in OpenLayers?

In this leaflet example. When hovered over a cluster marker, it shows the bounding area of the clustered features which is known as convex hull. Is there a way to reproduce it with OpenLayers?
2
votes
0answers
82 views

QGIS 2.0 How to copy the color styling to a color column in a layer's attribute table

I have a polygon layer in QGIS that I have applied a random color style to each polygon. Under Layer Properties -> Style I selected a Categorized style and then generated a random color ramp. I added ...
1
vote
2answers
77 views

Leaflet highlight feature by ID

I have a map application where: I load polygons as GeoJSON objects I draw all polygons in a single layer I highlight a polygon on mouse hover What I need to do is the following: on mouse hover, I ...
1
vote
1answer
66 views

labels showing up behind other labels due to unmatched z-index

I am using leaflet label plugin to show labels on markers by using layer.bindLabel('name'). As the number of markers is high the markers come above the label thus labels are not visible clearly. ...
0
votes
1answer
67 views

Reproject WKT Polygon with Javascript

I have a polygon in WKT in EPSG:4326: polygonWKT = 'POLYGON((13.215179443359373 52.588032137196755,13.42803955078125 52.592620721000365,13.454132080078125 52.46897854656702,13.347015380859375 ...
2
votes
3answers
8k 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 ...
0
votes
1answer
80 views

Show map using esri leaflet, with 4326 spatial reference

I have this MapServer http://geoservices.big.go.id/arcgis/rest/services/RBI/Rupabumi/MapServer It turns out it uses 4326 spatial reference. I want to present it using leaflet, my code so far: ...
2
votes
3answers
92 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 ...
0
votes
1answer
55 views

CartoDB or Leaflet.js get coordinates of point clicked?

Using CartoDB or Leaflet.js is it possible to retrieve the coordinates of the point on the map clicked when opening an infowindow?
0
votes
1answer
54 views

Zoom variable or pixel distance

I have query by distance working in a framework that generates a list of features within a fixed distance of a clicked feature. I would like to make the queried distance variable based on either: ...
0
votes
1answer
87 views

Displaying properties from GeoJSON file in choropleth map Leaflet.js

I'm using the Leaflet.js library to generate a choropleth map of zip codes colored by some property values stored within an externally loaded GeoJSON file. I'm following a tutorial here but have run ...
1
vote
1answer
52 views

PostGIS: Update child geometries based on parent

I'm using Leaflet and postgis in a case where using Leaflet draw plugin I draw a polygon first like this Now, I draw a line which cuts the polygon and using line and polygon geometry, based on ...
0
votes
0answers
29 views

Can i access UTF grids without a server?

I'm creating a slippery map that will run off of a usb stick or cd (client request). I'm able to load up the map, display pre-cooked tiles and some some simple vectors. The client would like some more ...
0
votes
1answer
92 views

Zip Code-Level Choropleth Using Leaflet.JS

Brand new to Leaflet.js, but I'm enjoying learning it. However, I have a question I've been working on that even the Google hasn't been able to answer just yet. Is it possible to create a choropleth ...
1
vote
1answer
314 views

Looking for a GeoJSON describing the french departments

Is there any place where I could find a GeoJson describing the borders of the french departments, or do I have to convert a .shp file?
1
vote
0answers
45 views

Can't project ArcGIS Tiled Service for Esri-Leaflet

I'm following this example from the esri-leaflet docs. I have an ArcGIS Tiled MapService in ESRI:102696. So I'm trying to use Proj4Leaflet to project the service and use it in my application. I ...
1
vote
1answer
28 views

Delay on Marker Title in Leaflet

I am trying to put title on leaflet markers. This explains the way to give title to marker which would appear on hover. Is there any way we can set time on that i.e. make the title appear after 50ms ...
0
votes
0answers
25 views

Can tilecache create UTFgrids?

Am i able to create utf grids in tilecache or do i have to move to tilestache? I ask because i am using, and would prefer to continue to use, utmZ10 and not wgs84 or spherical mercator.
0
votes
0answers
42 views

How to access map tiles from external storage in PhoneGap?

I am trying to build an Android app using Phonegap and Leaflet. I have added a local tile layer and added the tile folder within the www folder. It's working fine. var tmsLayer = ...
0
votes
0answers
24 views

Possible to call Telogis Geobase server from OpenLayers or Leaflet

I've been creating mapping solutions some time with various platforms and one I am currently working on is utilizing Telogis. I'm having a lot of trouble with their JS library, and it's not playing ...
4
votes
4answers
4k 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 ...
5
votes
2answers
1k views

Leaflet Polyline with custom fill pattern

I'm drawing Lines with leaflet.js an have to create custom styled polylines. So i got various image files which should be like a repeated background image in HTML. So is it possible to give a drawn ...