OpenLayers is a JavaScript library for creating dynamic map widgets for web sites.

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4
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1answer
1k views

GeoWebCache and OpenLayers horizontal resolution error

I have a mapping application (the Arne G. Brekke Bygdebok Collection) which uses OpenLayers to load map tiles from a GeoWebCache server operated by the Statens Kartverk (Norwegian Mapping Authority). ...
1
vote
1answer
262 views

Parse a KML for Openalyers

I am trying to get a kml from a URL to display in OpenLayers. However, it is a ground overlay so it cannot be displayed the standard way. I found this thread: Does OpenLayers supports KML Ground ...
2
votes
2answers
672 views

Exporting OpenLayers.Layer.WMS to GeoJSON / KML

I'm looking the way to exporting an especific region of a WMS layer to some XML format (GeoJSON, GML, KML) using OpenLayers and Geoserver. I've found how to export features objects with ...
3
votes
0answers
411 views

Get tile URL with projection different than 900913

I have the following code, which should display a slippy map showing tiles producted by me with mapnik: Proj4js.defs["EPSG:31258"] = "+proj=tmerc +lat_0=0 +lon_0=13.33333333333333 +k=1 +x_0=450000 ...
1
vote
1answer
288 views

GeoServer Exception: No such operation WMS 1.1.0 GetFeature

I'm using GeoExt, OpenLayers and GeoServer. I've added a checkbox to my layer tree which, when clicked, activates a "select feature" control such that when a user clicks on the map, the feature ...
1
vote
0answers
239 views

Are there any examples of creating custom openlayers geometry types?

I am working on a project that uses openlayers where IE8 compatability is a requirement. Unfortunately, there seems to be some performance issues with OpenLayers in IE8 when parsing a large number of ...
3
votes
1answer
4k views

OpenLayers - is it possible for a feature to have both a single click and double click event?

I'm have an OpenLayer map with a single vector layer containing many features. I've been using SelectFeature to pop up some info when a feature is clicked, and that's working fine. However, I now want ...
5
votes
3answers
8k views

Change Icon of Single Vector Feature in Layer

Currently I am trying to change the icon of a particular feature of a vector layer that the user is focusing on. I add each feature to the map like so: var point = new ...
1
vote
1answer
531 views

OSM Map projection doesn't seem to change

I have the following OpenLayers map: Proj4js.defs["EPSG:31258"] = "+proj=tmerc +lat_0=0 +lon_0=13.33333333333333 +k=1 +x_0=450000 +y_0=-5000000 +ellps=bessel ...
0
votes
1answer
396 views

Vector layer shifted on OSM map: why?

I've defined the following map: Proj4js.defs["EPSG:31258"] = "+proj=tmerc +lat_0=0 +lon_0=13.33333333333333 +k=1 +x_0=450000 +y_0=-5000000 +ellps=bessel ...
3
votes
1answer
108 views

Is it possible to create Non Earth map in openlayers?

I'm working on a little hobby project for a game, it has some information about locations that are non earth coordinates with extents of 99999999999999999 to -99999999999999999 might even be larger. ...
0
votes
2answers
660 views

Unable to reflect JSON in grid

I am trying to fetch the data from JSON and display it onto the grid. The store has all the JSON data, but I it is not visible in the Grid. The grid comes out completely blank. This is the ...
2
votes
1answer
505 views

Problems using 2 maps with multiple layers and loadend event

I have 2 or more maps with one ore n layers on each map. Now I want zoom to extent for each map, but the getDataExtent returns only for the last layer in the last map a bounds. Can you help me? Here ...
1
vote
2answers
742 views

How to overlay points from MySQL served by Geoserver on an Openlayers map?

This might be a very basic question as I am new to GeoServer. What I am trying to do: I have a MySQL table that stores data attached to a spatial point and have latitude and longitude columns to ...
5
votes
1answer
1k views

How to check map tiles are loaded in OpenLayers?

How to check if the map tiles are loaded? I need to know whether all map tiles are loaded on to the OpenLayers map as html contents.... Is there any method to find out or function in openlayers to ...
3
votes
2answers
7k views

How to redraw / refresh map on canvas resize?

I've created a web page that contains a button to set the map full screen and back to its normal form, the problem map doesn't set to full screen until I resize the output window, how to overcome ...
2
votes
3answers
925 views

OpenLayers.Format.GeoJSON throws an exception “SyntaxError: JSON.parse: unexpected character” for valid JSON

In my GeoExt client, I have the following line that retrieves JSON data from a web service into a FeatureStore: var store = new GeoExt.data.FeatureStore({ layer: route_layer, fields: ...
1
vote
1answer
433 views

Geoserver and SRS

I have a very basic problem, and please bear with me since I'm new to GIS. I have geoserver installed in a Ubuntu Box and installed a few maps in shapefile. The maps were originally in ArcGIS format ...
1
vote
0answers
187 views

OpenLayers Icon e PopUp

Ciao, sto creando una pagina in php con una mappa ... in OpenLayers Examples ho trovato due interessanti esempi: esempio che mostra come usare diversi tipi di poupup ...
0
votes
1answer
224 views

PopUps for all the Feature layers

I am trying to create GeoExt action button to fetch the feature info from all the layers. I am still getting the info for my point features but I am getting nothing for the usa:states, that appears in ...
2
votes
2answers
2k views

How to read OpenLayers event object features?

This is part of an interface that uses a box to select features on a WMS Layer. This then writes the name of the features to a div as a list. var recycling = new OpenLayers.Layer.WMS( "Recycling ...
1
vote
0answers
242 views

ScaleLine shows NaN for LCC projection

I have used openlayers along with geoserver. My Map is having LCC projection by default, but SRS is EPSG:4042. The problem is that the scaleline shows NaN in meter as well as feet. How can I correct ...
7
votes
2answers
571 views

OpenLayers how to maintain layer ordering while using SelectFeature control

I'd like my map to display a few layers in a particular order. Some of these layers are Vectors, others are XYZs, and some of my Vector layers display attribution. Initial layer ordering works fine ...
1
vote
1answer
484 views

Creating a GeoExt Action from OpenLayers Function

I am trying to create a GeoExt function out of this OpenLayers function, which displays the getFeatureInfo. I was able to create this GeoExt.Action() but it does not give me any output. Any idea ...
0
votes
1answer
1k views

OpenLayers Control.WMSGetFeatureInfo does not send request to geoserver

I'm refactoring the code used to getfeatureinfo from geoserver running on port 8080 at http://www.edpp.cz/zul_mapa-povodnoveho-planu-mesta/. The old version uses OpenLayers.loadURL and successfully ...
1
vote
1answer
387 views

OpenLayers.Control.DragFeature, strange behavior

Hi GIS-Cracks, I've been reading in this forum for a while and it helps me lot of times. Now I think it is the time to help me again but maybe other people too. So I try to describe a problem I have ...
0
votes
1answer
179 views

How to get a handle on default MousePosition elements in OpenLayers?

I have an OpenLayers interface with two maps side-by-side. They are synced so that any pan or zoom action on either map affects both of them. I also have MousePosition controls on each map so that ...
2
votes
1answer
1k views

OpenLayers with a small, discrete set of XYZ tiles

I'm trying to set up a handy map of my Minecraft server to share with my fellow players; the specifics on that front aren't really necessary though -- suffice it to say that I have a tile set (each ...
2
votes
1answer
254 views

Wrong coordinates after resizing the map

I catch a click event on openlayers map and show a popup with featureinfo (if any) with position set as map.getLonLatFromPixel(new OpenLayers.Pixel(e.xy)). The user might set the map to show in ...
2
votes
1answer
734 views

How to make OpenLayers.Popup draggable?

I've used jquery-ui draggable option as following but the moving popup can not be ended once dragging has started. Is there any another method to make OpenLayers.Popup draggable? popup = new ...
2
votes
2answers
1k views

Google Maps/ OpenLayers only rendering top left tiles

I'm seeing a weird issue with Google Maps and OpenLayers. When loading a page as shown below, only the two top-left tiles render, leaving the rest of the map blank. I looked in the Network tab in ...
0
votes
1answer
2k views

How to check if wms layer is queryable in openlayers?

I'm running a map with lots of different wms layers published by geoserver. Some of them are queryable, some of them are not. How can I tell that with openlayers api? I'm requesting getfeatureinfo and ...
2
votes
1answer
242 views

Which OpenLayers.Protocol should I prefer which design patterns provided at?

At our scenario, there is a server which stores the feature info (coordinates, properties, etc) into a SQL database. Google Maps are used for a layer. The geoJSON data format are used for ...
3
votes
4answers
379 views

Is it possible to change the name of a Stamen basemap in OpenLayers?

I'm adding a Stamen basemap to OpenLayers using the syntax below. Is it possible to change the layer's name, so that it appears in the Layer Switcher using this name (rather than "toner")? The ...
2
votes
3answers
851 views

adding non spatial attributes using geoserver

I am using Openlayers + geoext to perform transaction operations in postgis database using geoserver . i can insert spatial data into postgis but cannot insert other data like road name, road type in ...
5
votes
4answers
10k views

Customizing Popups in Openlayers

Is it possible to customize the shape of popups in OpenLayers? For example, I am creating a pop-up using the following approach: var popup = new OpenLayers.Popup.FramedCloud( "popup", ...
1
vote
1answer
1k views

Openlayers zoom limit with Google Maps

When using Openlayers I am unable to achieve the same zoom level that Google Maps allows. For example, if I embed a Google Map in my web-page I can zoom in to the building level in a city. When using ...
5
votes
4answers
730 views

How to use OpenLayers for CrowdSourcing/ collect data?

I'm currently making my first steps in OpenLayers, trying to build a page showing a map where people can add data, which is then saved back in our database. (Background: Mapping of the distribution ...
2
votes
2answers
61 views

How can I create a new function inside a existent class in OpenLayers?

I want to add some functions inside a existent class in OpenLayers. For example, I want to add function A() and B() and a variable C inside OpenLayers.Layer.Vector. var X = function() { A() = ...
2
votes
1answer
76 views

Which conditions does the geoJSON file read from the server in?

I've added an alert to the function myReadFunction in order to detect function calls. As according to my observations, the function readMyFunction is called sometimes while I have been navigating on ...
2
votes
1answer
507 views

How to validate whether the BBOX strategy works successfully?

I want to send requests to our feature server that asks only data within the viewable map extent. So I've used BBOX strategy and HTTP Protocol as following code. mVectorLayer = new ...
2
votes
1answer
980 views

Problem with layer order in OpenLayers and Google styled maps

I'm using OpenLayers with Google styled maps. My biggest problem is KML polygon layer which needs to be under roads layer but it isn't (see prtscr). What am I doing wrong? This is my coding: ...
3
votes
2answers
51 views

Which OpenLayers highlights should I present to a non-specialist audience?

Hello Openlayers Experts/Users There is an event in my University that interests in Open Source Software. I am supposed to give a short presentation about anything related so I thought about giving ...
1
vote
1answer
1k views

How to overlay roads layer on top of all layers in OpenLayers?

I want to put roads layer (from any source, please recommend some..) on top of my KML polygons and base layer: baseLayer = new OpenLayers.Layer.WMS("OpenLayers WMS", ...
2
votes
1answer
313 views

Giving properties to Zoomify layers in OpenLayers?

I am using OpenLayers.Layer.Zoomify to show large image files and this works like a charm. The only thing is that I would like to add some options to that layer ( opacity and transitionEffect) but it ...
2
votes
1answer
159 views

How to get the number of objects at a pixel position?

Is it possible to get the total number of objects (Lines,Points) at a given pixel position in the map?
8
votes
2answers
2k 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.
15
votes
4answers
1k views

What are some high-profile websites that use OpenLayers and PostGIS?

I think there are many convincing arguments for using PostGIS but I am interested in showing people examples of websites that use PostGIS and OpenLayers. Some examples that I have seen are: ...
0
votes
1answer
416 views

How to insert non-spatial data through WFS-T insert?

When i perform wfs-t insert operation using postgis database only spatial data and primary key gets inserted. Can anyone point me to some examples in which attribute data are also inserted along ...
2
votes
2answers
869 views

How to search and zoom to result using WMS?

I am making a web gis application (openlayers/geoserver) to display a layer of properties, I need to add a functionality of search in it based on the name of the owner. A list of similar names ...