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

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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 ...
3
votes
2answers
90 views

Mixing coodinate systems

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 in an area of ~10x10 kilometers in several layers. ...
1
vote
1answer
126 views

How can I make sure that tiles display properly when you first go to the page?

This page is not showing my map tiles properly when you first go to the page. http://bear.hol.low.li/Pocket_Docent/map.htm If I resize the window it centers and distributes the tiles properly. How ...
6
votes
1answer
1k views

Using Tilestache and Leaflet To Display Rasters In Native Projection

I have a collection of old Idaho state highway maps in GeoTiff format. The projection that these maps have been georeferenced in is a transverse mercator projection, called IDTM83 (Idaho Transverse ...
1
vote
1answer
3k views

Go to the URL when clicked on Leaflet marker

I want to implement marker click event so when user click on marker it goes to url. Url is written inside an array (a[3]). However, this is my code which doesn't work, it always goes to the link of ...
4
votes
5answers
2k 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
2answers
684 views

GeoJSON formatting for Leaflet

I am using http://GeoJSON.io as the source for my data, which is then to be displayed via Leaflet.js. I found that leaflet neads the file to include "var name = {" but GeoJSON.io doesn't like it, ...
3
votes
1answer
565 views

Drag marker from outside to leaflet map

Is there any way to drag a marker from outside to the map using leaflet Api . Any suggestions plese help me?
7
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...
1
vote
2answers
3k views

Dynamically set zoom level based on a bounding box

I have a leaflet map whose size depends on the size of the browser window. I would like the zoom level to be dynamically chosen so that it is as zoomed in as possible while showing the entirety of the ...
1
vote
2answers
2k 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
2answers
6k views

setStyle() function for GeoJSON features - Leaflet

Ok, since I already asked a very long question about this, but since it didn't get any new replies for a while, and not to get confused in details, I will keep this one simple the best way I can. If ...
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 ...
1
vote
2answers
417 views

qgis, simplify parcels to share borders

Is there a QGIS plugin or other method that simplifies parcels to share a common line(border)? I'm pretty sure I read about this some time ago. Couldn't find anything here or elsewhere. I'd like to ...
5
votes
1answer
4k 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 ...
0
votes
0answers
280 views

Why do my maps exported in WGS84 have large coordinates?

I'm using QGIS to export map layers as GeoJSON for use in Leaflet. The map file CRS is WGS84(EPSG4326) and I'm exporting it as such. The issue is the exported coordinates are still too large: [ ...
1
vote
0answers
86 views

How can i add to DB new created Polygon?

i'm new to LeafLet and i'm trying to understand power of LeafLet for mapping.. Question is simple, let's say i've created a new object(e.g. polygon) map.on('draw:created', function (e) { ...
3
votes
1answer
5k 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: ...
1
vote
1answer
2k views

Leaflet Heatmap Dynamic data layer

I am trying to add heatmap layer to my map. I have tried the following plugin: http://www.patrick-wied.at/static/heatmapjs/example-heatmap-leaflet.html From this plugin the data came from ...
1
vote
2answers
329 views

Is it possible to convert regular JSON to GeoJSON?

My apologies if this is a repeat question, I searched here and couldn't find an answer. I have JSON data I've exported from Openpaths.cc which contains lat and lon values. However, the data is not in ...
0
votes
1answer
254 views

Leaflet: Centering map when zoom in

For a project I have to use four sets of JSON datas (and one of the files is bigger than 10M). I am loading these files asynchronously using queue.js. Once it's fully loaded and displayed I am ...
2
votes
1answer
260 views

How to efficiently render and enable user interaction on thousands of points with Leaflet?

I've got a large dataset comprised of about 10k points representing gas stations. Some of these gas stations sell diesel fuel, others do not. In my web map, I want to let the user switch between ...
4
votes
1answer
114 views

How can I create drawFeature control in leaflet?

I want to call a callback on leaflet after drawing a feature. In openlayers I do it like this : customControl= new OpenLayers.Control.DrawFeature( tempLayer, ...
1
vote
1answer
777 views

Leaflet Custom menu links

I have an issue where leaflet when embedded in Drupal will not allow the user to click on the map as the Y coordinates have a decimal on for some reason. As a quick fix, I am thinking to put the map ...
1
vote
1answer
544 views

Leaflet Legend fixed image? not SLD?

I have a style pulled from my GeoServer and have created a basic legend, with a fixed PNG. However I was wondering if it is possible to have this legend be pulled from the layers SLD? so that if the ...
2
votes
1answer
499 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
0answers
318 views

Does SVG offer better performance than plain HTML to render text labels in Leaflet? [closed]

I'm using Leaflet built-in L.DivIcon to add text labels to my map. Text labels are rendered in simple HTML divs and can be rotated and scaled using CSS based on values obtained from geojson data ...
3
votes
1answer
196 views

looking for an esri compatible javascript engine

I work on an esri heavy team, i'm looking for a mapping engine that will give me flexibility to build on top of and leverage only the pieces I need and or add more as the app grows. I've been using ...
1
vote
2answers
219 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?
0
votes
3answers
701 views

Can leaflet read OSM xml format?

I want something similar to OpenLayers.Format.OSM for leaflet. i know how to use a geojson file and i have found support for GPX and WFS in plugins, but not for OSM. Simply saying i want to make this ...
2
votes
1answer
2k views

Request WFS from GeoServer with Jquery AJAX using INTERSECT cql_filter error

I am having difficulty troubleshooting this issue and would appreciate some ideas. Thanks in advance! I am trying to make an AJAX request from a Leaflet map with Jquery to GeoServer to return a WFS ...
2
votes
1answer
298 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
1k views

Incorporate Google Streetview into a Leaflet map

The person who asked the question at the link below way back in 2011 said, "I understand that it is possible to incorporate Google StreetView into non-Google apps". Can anyone tell me how this is ...
0
votes
0answers
367 views

Leaflet WMS Layer from arcgis server (extreme noob question)

I am very new to GIS, and find things a bit overwhelming. Please be kind and excuse my ignorance. I am trying to display a map on a website using leaflet. The map I want to display is hosted from an ...
0
votes
1answer
108 views

Postgis objects inside Leaflet circle

How can I retrieve database objects from postgis database which are contained inside Leaflet circle object? I assume circle is only a point with some radius and not a polygon. I wonder can it be ...
2
votes
2answers
820 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
0answers
73 views

How to draw ploygon in leaflet that use event?

Is there only one way to draw a polygon through the Leaflet.draw plugin? If you want draw anything, you must add the control ("map.addControl(drawControl);"). I want to draw a polygon on leaflet map ...
0
votes
1answer
648 views

Why WMS Image Repeat leaflet?

I setup wms service using mapserver, the map file is attached . I have created index page, the code is <!DOCTYPE html> <html lang="es"> <head> <meta charset="utf-8" /> ...
2
votes
1answer
112 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 ...
3
votes
0answers
561 views

Using Custom Map Projection On Leaflet

I have an application displaying a EPSG:3414 map running on Openlayers - jsfiddle working sample that works. I am trying to implement the same on Leaflet - jsfiddle non-working, it is not working as ...
4
votes
2answers
686 views

LeafletJS: Load Tile Layer based on bounding box

I have a LeafletJS map application with lots of layers. I have a few layers that only have imagery for certain regions across the world. Because everything goes on a world base map. All tile caches ...
2
votes
0answers
465 views

Data visualization techniques for web maps using ESRI and open source suites

I want to represent statistical data over the web map and looking the examples/techniques to represent data on the web map (apart from Pie-chat, bar graph) with new tools like gauge widget etc. ...
1
vote
1answer
200 views

projection error on Leaflet map

I am trying to add a converted shapefile (now a geojson) to a Leaflet basemap, using EPSG 26986, so I tried using proj4leaflet to reproject it. However, I keep getting an error message "phi2z has ...
-3
votes
1answer
2k views

How to create a layer switcher in leaflet

I had used the following layers in leaflet,now i want to switch between the 4 layers ,please tell the code to create a layer switcher control in leaflet // night layer //var osmUrl = ...
4
votes
2answers
1k 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 ...
1
vote
1answer
2k views

Leaflet export to jpg

Does anybody know if there is a way to export the current view of a Leaflet map to jpg? The setup is as follows: Leaflet is hooked up to an Oracle database. Depending on user interaction, various ...
8
votes
1answer
10k 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 ...
2
votes
0answers
84 views

Is it possible to link polyline features on a web map to a Google Chart?

I would like to display a line chart and (leaflet) map beside each other on a web page. When I turn off a series on the chart the associated polyline feature (river) should turn off on the map. I am ...
6
votes
4answers
9k 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 ...
6
votes
2answers
966 views

Progress bar for Leaflet map

Is there any way to show progress bar while waiting that all layers are rendered on Leaflet map? In this specific case, while geojson layers are rendered. Thanks.