JavaScript is a prototype-based, object-oriented scripting language that is dynamic, weakly typed and has first-class functions.
87
votes
14answers
23k views
Comparison of JavaScript mapping libraries?
I am working on a web-based mapping system and I'm trying to figure out the best/most appropriate library to use. There are a few of them about and they each have pros and cons. Even after trying a ...
17
votes
6answers
1k views
What embeddable web-based maps exist?
Some of the ones I'm familiar with (in no particular order):
Google Maps (http://code.google.com/apis/maps/index.html)
Bing Maps (http://www.microsoft.com/maps/developers/)
Yahoo Maps ...
13
votes
1answer
291 views
Are there any Javascript map labeling engines available?
Does anyone know of a javascript library containing functions that would allow me to generate labels for points on the map so that the labels don't overlap one another, and have optional leader lines ...
12
votes
4answers
2k views
Which framework is best to implement an application robustly, using ArcGIS Server JS API?
Over on the Esri forum, user Matt Moyles suggested that the approach used in the Esri JS samples isn't suitable for robust development of a web mapping application using HTML, JavaScript and CSS:
...
11
votes
8answers
6k views
How to Create Animated Cluster Markers in OpenLayers/Leaflet?
I want to use Leaflet due to the smooth transitions which Openlayers seems like they can't match. I specifically require the ability to cluster markers with custom styled marker groups.
The best ...
11
votes
5answers
4k views
Pure JavaScript Library for Geometry Operations
Does anyone know of a pure JavaScript library for doing geometry operations such as buffer, union, intersects, etc? I want to play with doing these operations in the browser. It looks like ...
11
votes
2answers
3k views
OpenLayers alternatives supporting more client-side features
I am considering different architectures for a system that will ideally use client-side rendering for point features and must be plugin-free. I have been using this application developed in response ...
10
votes
9answers
1k views
What is a good Javascript web API (preferably open) for building web maps that require little/no maintenance?
I have recently volunteered to make a web map for a local non-profit. The map will be pretty basic. It needs to display Lane county, Oregon split into multiple districts, with a "central office" ...
10
votes
3answers
316 views
What's a good library for displaying many small maps on a web page
I would like to create a visualization on the web similar to the following:
http://namemapper.babynamewizard.com/namemapper/
Are there any good libraries for doing this? Is OpenLayers light-weight ...
10
votes
3answers
2k views
Open source alternatives to Google's StreetView engine?
I am looking to create an open source javascript app using either Leaflet or OpenLayers. Is there any way to implement panoramic views (similar to Google's StreetView) into either of these, or any ...
10
votes
3answers
984 views
Options for displaying PostGIS rasters in OpenLayers
This question is similar to an earlier question about displaying vector data in a web-map. I want to have a basic web interface which uses OpenLayers and can display raster data that is currently in ...
9
votes
3answers
1k views
Where can I find country borders data in human-readable format?
I'm trying to obtain some data representing the borders of all countries in the world. This data doesn't have to be very precise, it is to draw the countries on a computer screen. I did a bit of ...
9
votes
4answers
632 views
Visualizing large datasets with Leaflet
When using Leaflet to visualize a large dataset (GeoJSON with 10,000 point features), not surprisingly the browser crashes or hangs. A sub-sample of 1000 features from the same dataset works ...
9
votes
3answers
710 views
Best ways to embed dynamic maps into PDF files
Working in consulting, I found that sending clients PDF file with my embedded maps is one of the best ways to achieve a wow-effect from them. The latest pdf file formats all support the layers feature ...
8
votes
3answers
315 views
Chart inside pop up window in Javascript
How to show a chart inside pop up window? I'm using Leaflet JS, which has support for raphael plugin http://dynmeth.github.com/RaphaelLayer/. Is it possible to create a div inside popup window? I was ...
8
votes
2answers
516 views
OpenLayers 2.12 and http basic authentication woes
I am trying to use OpenLayers 2.12 to display WMS layers from a server which has HTTP Basic Authentication enabled.
I have tried to handle the authentication by putting the username and password in ...
8
votes
3answers
1k views
Mobile offline mapping and editing of shapefiles
I've got a client that wants to create a mobile app that can view and edit shapefiles stored locally on the device to enable it to work offline. There is a possibility of converting the shapefiles to ...
7
votes
3answers
397 views
Map Application Requires Refresh to Initialize
I tried this question over on StackOverflow but didn't get any answers. Hoping you all might be able to help.
Creating a web mapping application in Javascript/Dojo:
When I load the app in a browser ...
7
votes
2answers
6k views
OpenLayers: Use scales instead of resolutions
Venturing around in the OpenLayers source code, it seems like everything related to zoom-levels is done using resolutions. Fair enough since this related directly to screen space.
I would like ...
7
votes
1answer
881 views
Browser support for ESRI ArcGIS JavaScript API (v2.4)
Can anyone give me information or a good pointer on browser version support in the ESRI ArcGIS JavaScript API v2.4?
I can't find much in their documentation beyond changes in support for specific ...
7
votes
4answers
6k views
Overlaying lat/lon points on Google layer in OpenLayers
I'm stuck adding a vector point in lat/lon on top of a Google layer in OpenLayers. The point is moving when I pan the map. This doesn't happen if I replace the Google layer with a layer in WGS84. How ...
7
votes
1answer
964 views
How to add a layer to SelectFeature without losing existing selections?
I'm using an OpenLayers.Control.SelectFeature for selections on multiple layers. However, when I add a layer using setLayer(), my selections on the other layers are lost.
Anyone know how to work ...
7
votes
3answers
135 views
CORS issue ArcGIS 10.1 IIS (Cross Origin Resource Sharing)
I have ArcGIS 10.1 installed with the web adapter for IIS. I've added a config file to the root of IIS7 to enable Cross Origin Resource Sharing (CORS) as per this page. I've pushed the cors enabled ...
7
votes
2answers
2k views
How to cluster Google Maps kml overlay
I have several thousand markers stored in a kmz file that I load into a Google Maps (v3 API).
I've looked around to find a way to cluster the overlay data, but to no avail.
MarkerClusterer looks ...
7
votes
3answers
670 views
what is the right way to delete all features from featureLayer
I have a feaureLayer and I don't want to kill it and create another one. I want to delete all features from the current featureLayer. I found that I can use applyEdits method but in order ot use it I ...
7
votes
1answer
859 views
Adding Panoramio Photos To An OpenLayers Map
I have a pretty well integrated OpenLayers map that I want to add photos from the Panoramio API to. Unfortunately, it seems both API's are under documented on this subject. I found one great tutorial ...
7
votes
1answer
128 views
Instructor led Web mapping development courses?
Hey guys I have been messing around with programing for a while now and have gotten proficient with Python and have some interest in HTML 5 and Javascript. I have recently received a request for an ...
6
votes
2answers
511 views
Accessing GPS data with JavaScript in real time
Is it possible to access GPS data in real time on a smartphone with JavaScript (without an android or ios application I mean)?
Thanks
6
votes
3answers
861 views
tiny JS discretization library for choropleth representation
I'd like to know if there is somewhere a tiny stat/discretization js library ready to use?
Actually I know the existence of jStat (which I may explore a little bit more), and I know mapfish has a ...
6
votes
3answers
4k views
Creating a Bing and Google Tile Layer for Leaflet
I want to use the Leaflet Javascript Library to display both a Google and Bing Tile Layer, though I'm unsure how to construct the url. The documentation shows an example using OSM:
var cloudmadeUrl = ...
6
votes
2answers
891 views
Restrict pan and zoom in ArcGIS Javascript API?
I'm creating a web map of a university campus. I have the map functioning, but I don't want to be able to pan off of the basemap, into whitespace. Do you know of a function that will auto-pan the ...
6
votes
2answers
188 views
Randomly Generate Streeview Point without GIS in country
I'm interested in pulling street view data at random within a country.
I can only figure out how to generate a point within a bounding box. Often it pulls data from nearby nations. I'm using a GIS ...
6
votes
1answer
398 views
What does maps.nokia.com use?
The maps on maps.nokia.com are pretty amazing. I assume they're generating their own tiles but, does anyone know about the infrastructure behind site: the tile server used? and their JavaScript ...
6
votes
1answer
1k views
Is it possible to use esri.dijit.Popup for editing
In the new arcgis js api ESRI added new nice infowindow - esri.dijit.Popup. We can use it this way:
//create a popup to replace the map's info window
var popup = new ...
6
votes
1answer
2k views
How to style features created by DrawFeature control?
I've been following this tutorial:
http://workshop.pgrouting.org/chapters/geoext_client.html#select-the-start-and-final-destination
It contains an Openlayers.Control.DrawFeatures control defined in ...
6
votes
1answer
726 views
How do we add a custom basemap in ArcGIS.Com that can be used in Javascript API?
It's possible to add a layer as a basemap in ArcGIS.com by checking the check box use as baselayer:
But when I consume the map using:
var mapDeferred = esri.arcgis.utils.createMap("<guid>", ...
6
votes
1answer
1k views
Add a OpenStreetMaps road data layer on Google Maps API v3
I've successfully embedded a Google Maps API v3 map on my site, and added OpenStreetMaps (OSM) as the base layer. Is it possible to use Google's tiles as the base layer, and then overlay street data ...
6
votes
2answers
2k views
How to navigate the REST endpoints and retrieve Field information programatically
I'm adding a Dynamic Map Service to an ArcGIS Server JavaScript API map, and I need to get hold of each component layer and its fields, so I can run a query.
See the sample ArcGIS Server services ...
6
votes
1answer
212 views
Trigger geocoding without having to visit page
I'm using Google's geocoder to store results in database then display them on a map on another page. The problem is that each company profile page needs to be visited before it's geocoded.
Is there a ...
6
votes
1answer
604 views
How to configure custom scale in Leaflet?
I have a custom WMS tileset generated using ESRI ArcGIS Server.
I have successfully configured an OpenLayers page to display this basemap. The code is as follows:
var map = new ...
5
votes
3answers
3k views
OpenLayers - redrawing map after container resize
In my web application, I want to enable users to set the size of the map container.
Everything worked fine when the container was expanded slightly (apparently this is because the tiles that were ...
5
votes
2answers
532 views
Help needed using REGEXP for address string parsing
Using JavaScript, my aim is to create an "intelligent" address search function with a single textbox (rather than separate textboxes for house number, street name, street type, suburb, etc).
I'm ...
5
votes
2answers
484 views
How to time function calls in OpenLayers?
We have an existing application that has a function that wraps the OpenLayers.Layer.Vector constructor, which gets its layer info from a KML source over http. Once this function completes, I need to ...
5
votes
3answers
5k views
Draw a point with ArcGIS Javascript API
I am currently trying to draw a point with the ArcGIS Javascript API.
Pretty much like this example, http://help.arcgis.com/en/webapi/javascript/arcgis/demos/toolbar/toolbar_draw.html, except the ...
5
votes
2answers
231 views
How to display a lot of images with OpenLayers?
I would like to display a lot of images at same time. The images are georeferenced (they have extents), with some labels on top of it which, on click, open popup. I can not say how many exactly ...
5
votes
2answers
513 views
How to resize a point on zoom out?
I've added a point on map like this but it is static in size. How to resize that point on zooming?
Map on zoom out
Any guidance and help is appreciated.
5
votes
1answer
2k views
Find bounding box of a Google map
Is it possible to get the bounding coordinates of a google map that a user has zoomed to using Javascript? I see that it can be done using the Google App Engine but I don't know if is possible using ...
5
votes
1answer
218 views
Unclear on proxy used for AJAX in Javascript
I do understand how the proxy helps in transferring the XMLHttpRequest between the ArcServer and the Server (IIS/Apache) but where I am confused is that the first time the Html Doc loads, doesn't the ...
5
votes
6answers
412 views
Is anyone using JSONP in Web mapping applications to get around the browser same origin policy?
Javascript based Web mapping apps that use ajax requests to get data from a server are limited by the Same Origin Policy to only request the data from a server in the same domain (subdomain and port). ...
5
votes
1answer
2k views
How to create a movable point in OpenLayers?
I have the following code:
function mapCreate(lon,lat){
map = new OpenLayers.Map("map1");
var osm = new OpenLayers.Layer.OSM();
vectors = new OpenLayers.Layer.Vector("Vector Layer");
...
