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

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0
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1answer
454 views

How to pan (rather than zoom) when using a 2-finger drag on a Mac

Using Mac OSX, dragging the trackpad with 2 fingers performs a scroll of the web page, equivalent to using the mouse wheel. However, if the cursor is located within an OpenLayers map, the 2-finger ...
3
votes
1answer
552 views

How to hide some parts of an image layer with OpenLayers?

My Problem I'm currently displaying a layer image above a Google Maps base layer. I would like, when the user check/uncheck some checkboxes, that some parts of this image layer disappear, and the ...
3
votes
1answer
503 views

How to show a point on mouse over a hidden polygon?

Any suggestions on how to show a point on mouse over a hidden polygon? A single kml file contains two polygons and two points as in the image, I've hidden these polygon and point by setting stylemap ...
-1
votes
2answers
780 views

How to add point with current mouse position while mouse over on line feature?

I have a line feature in a vector layer "A", while i mouse over on that line. A point should be added to vector layer "B" with current mouse position. OR how can get lat lon of mouse position while ...
3
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3answers
329 views

Use Esri PersonalGeodatabase layers in OpenLayers

I would like to Know if it is possible to open a Personal Geodatabase of Esri with Openlayer with FileGDB_API_VS2010_1_2 Thank in advance Juan
9
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2answers
1k views

What's the best way to display thousands of polygons in Openlayers?

I am trying to create an Openlayers map that will display thousands of polygons. And when the user clicks on each, I want some of the metadata to display. Working with this large of a dataset seems ...
3
votes
5answers
3k views

How do I make KML overlays appear in OpenLayers at all zoom levels?

I need to overlay KML polygons on basic map in OpenLayers. I need that KML is visible on every zoom level. I did some coding, but my KML is not showing up. What am I doing wrong? Thanks. <!DOCTYPE ...
0
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1answer
146 views

Syntax for wfs-t request

I am in need of the correct syntax for performing transaction on WFS layer using OpenLayers. I have gone through many examples on the OpenLayers site and other examples, but can't figure out how to ...
3
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0answers
2k views

How to edit Attributes on WFS Layer through Popup?

I am working on a project for university. So far I have displayed WfsLayers which can be select from a panel, also I can click on my points whereupon a Popup will show up with some information which ...
2
votes
1answer
578 views

Connect JSON to GeoExt Application

I am returning a JSON to a GeoExt app and this is the code that is collecting the return, var control = new OpenLayers.Control.Click({ trigger: function(evt) { ...
1
vote
2answers
472 views

Distances and areas in Google projection

I have a mapping website used to capture polygons using OpenLayers in Google projection (900913) and storing them in sql server 2008 as geometry. The SRID on the sql geometry column is set to 900913. ...
0
votes
1answer
514 views

How to create KML file with OpenLayers?

I try to create kml file from features. My code var feature=myVecLayer.getFeatureByFid('filedata.1'); var format; function GetKMLFromFeatures(feature) { ...
1
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1answer
215 views

Is schema definition compulsory for WFS-T

Most tutorials on WFS transaction uses a schema and geom attributes in WFS request like this var wfs_layer = new OpenLayers.Layer.Vector("Editable Features", { strategies: [new ...
2
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0answers
156 views

dojox.geo.openlayers roadmap?

I'm curious as to the future of dojox.geo.openlayers. Presently is seems only to be a solution for positioning widgets on the map but I can imagine developing a suite of map specific dijits such as ...
1
vote
2answers
587 views

Problem with panning and zooming in OpenLayers

I'm interested in detecting when a user moves or pans a map so that I can run a new query on a database based on their location. However, the following code causes the panning and zooming controls to ...
3
votes
2answers
2k views

Load layers only when zoom level is reached

I'm trying to load different layers based on the user zoom level with OpenLayers. I've seen some similar questions in here, but they load the layer and then hide/show it based on the zoom level. I ...
2
votes
2answers
750 views

How to render a multi-layered (raster + vector) map to a file (PDF, SVG or JPEG, PNG)?

When using OpenLayers I can compose a map with several layers which is displayed nicely by my browser, but I need to do the same server side (no browser composing the layers), and I'm waiting a image ...
2
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0answers
292 views

OpenLayers WFS - GetFeature Draw Circle

I am developing GIS Portal using OpenLayers, I use WFS GetFeature to retrive some datas like bellow: var layer = map.getLayersByName("pf_trecho_at"); var polygonLayer = new ...
2
votes
2answers
2k views

Openlayers: How to highlight a point on mouse over a line

Any suggestions on how to highlight a point on mouse over a line, I've read points from a javascript array, lines are drawn by using them and I want to highlight some points in that array by moving ...
0
votes
2answers
4k views

Differences between ExtJS and Dojo Framework

I have been using OpenLayers and the ESRI's JavaScript API and found that both using different set of JavaScript libraries have some implications on the quality of application that they deliver. Dojo ...
1
vote
2answers
3k views

How to get GeoJSON features using OpenLayers?

Can anybody explain how to get geojson features .Can somebody show way to get attributes from geojson text. OpenLayers.ProxyHost = "/gt/proxy.cgi?url="; var lon = 5; var lat = 44; var ...
1
vote
2answers
577 views

Handling points in openlayers

I have a several hundred points that I am showing on a map. At the moment, my method of adding the points seems inefficient. I create an array using the following approach: var features = [new ...
0
votes
3answers
1k views

OpenLayers: Error message 404 (Not Found)

I've created a map using openlayers contains osm, google layers and some vector features, On loading it shows two errors like: GET http://tile.openstreetmap.org/0/0/1.png 404 (Not Found). How to ...
3
votes
2answers
3k views

Detecting map changes using Openlayers

Is it possible to delete a vector layer when a user pans or zooms a map? I saw in the documentation that there is a function called onMapResize. Can this also be used to detect a pan change? I want ...
1
vote
2answers
775 views

User Input in Openlayers Problem

I thought you could give me some advice regarding my problem. I have a working WFS Layer and I want to be able to type in some text which then should be used as the filter value. Afterwards the map ...
2
votes
2answers
866 views

how to buffer inside a polygon in Javascript

I'd like to know if it's possible to buffer a polygon on the INSIDE only using OpenLayers and other Javascript tools (e.g. jsts). Here's what I found about the topic in general: Buffering INSIDE a ...
8
votes
6answers
12k 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 ...
0
votes
1answer
657 views

Openlayers shapefile polygons hover effect

I have shapefile polygons. I'm using OpenLayers with OpenStreetMap tiles. Is it possible to create hover effect which will show up info window with some informations about that polygons? Is it the ...
4
votes
1answer
2k views

How can I remove a layer from layerswitcher in openlayers?

I have several vectors and WMS layers in layer switcher.But i don't need these layers to be displaying in layer switcher.How can i remove these layers from layer switcher? Thanks in advance..
1
vote
1answer
1k views

Problems using geoserver and postgis to perform wfs transaction?

I have been following the tutorial for transaction. I am using apache webserver and jetty powered geoserver for hosting and using proxy.cgi file for bypassing XHR requests. as described in tutorial ...
4
votes
1answer
6k views

OpenLayers, zoom to vector layer extent

It seems quite simple thing to me, but I get an error. map declaration map = new OpenLayers.Map('map_element', {... projection : _projObj.mercator, displayProjection : _projObj.wgs84 } layer ...
1
vote
1answer
138 views

Using AndNav tiles storage as input for OpenLayers.TMS

Is there a possibility to use map tiles from AndNav (created wit Mobile Atlas Creator) that are in format: Mapnik\12\2241\1369.png.andnav (I know that 12 is the zoom level but don't have idea what is ...
1
vote
1answer
191 views

Web mapping with Openlayers

On a pedestrian wayfinding scenario, I need to drape some extruded buildings close to the road as the user navigates along the road on a 2D Map Background. I hope I can use OpenLayers and ReadyMap for ...
1
vote
1answer
140 views

How to “page” through a set of features and display an infoWindow for each feature?

In the ArcGIS Server JS API the Popup object may be defined against an array of features. In that case the Popup contains Next/Previous buttons to allow the user to "page" through each feature in ...
1
vote
1answer
249 views

OpenLayers “Text” layer always visible on load

I'm trying to load a layer as an overlay and make it initially not visible airBoss = new OpenLayers.Layer.Text( "AirBoss Locations", { location:"./airboss.txt"} , { visibility: false, ...
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vote
0answers
396 views

Openlayers WFS Overlay Problem

a) I am running a PostGIS database, and I want to display a Table with a about 500 Points of Interest. The POIs have the projection EPSG 4326. b) Geoserver is installed, running and connected to my ...
0
votes
2answers
355 views

How to change a marker on click

I've crated a map and tried, but it doesn't change until another event is caught or zooming map or by switching the browser tabs. What is the reason for this. please help me I've fiddle the code here ...
6
votes
3answers
1k views

30,000 data points… can this be reasonably served using openlayers?

I'm trying to tackle a web GIS problem and need to figure out the best strategy. I have a map with 30,000 cells on it forming a grid for the province of Alberta. I have a list of data points for ...
1
vote
1answer
2k views

map extent to show specific country

I use openlayers in my web app.I want to set map extent on specific country to show cities of that country but i don't know which option of map can show specific country in map!. How can i show ...
2
votes
2answers
2k views

How to skip drag event to stop a feature being dragged

I am new to OpenLayers and I'm trying to drag markers and skip some markers from being dragged, I've tried dragFeature.deactivate(); it will deactivate entire features please help me. Please check ...
1
vote
1answer
1k views

OpenLayers : How to make a marker fixed [duplicate]

Possible Duplicate: How to skip drag event to stop a feature being dragged I've created a map and added markers to baselayer on click by using this code : vectorLayer = new ...
3
votes
1answer
794 views

Is there a map-level event to signal the start/end of drawing?

In OpenLayers, is there an event which fires when the map starts drawing any layer, and another for when the map has finished drawing all layers? I wish to display a "waiting" animation while any ...
1
vote
0answers
22 views

Show vehicle traveled route as animation [duplicate]

Possible Duplicate: Animate feature in openlayers I create map web app with openlayers and yii php framework. I want to show vehicle traveled route as animation like below site in my ...
2
votes
0answers
317 views

Creating a Geodesic Polyline Buffer in OpenLayers

I have a feeling that the answer is going to be 'You can't do that without some very complex coding' but I thought I'd go for it anyway. I recently asked a question on how to create a Polyline Buffer ...
3
votes
2answers
424 views

LineString in OpenLayers: Is it possible to draw segments in different colors?

I'm a newbie in OpenLayers. Can you help me with this: Is it possible to assign color not to the whole linestring, but to different segments?
1
vote
1answer
926 views

OpenLayers : Map not loading

If i use a single wmslayer as map baselayer it loads the map, but adding different layers like (google,yahoo) to map it won't works. Can anyone tell me how to overcome this.. thanks in advance.. ...
1
vote
0answers
581 views

OpenLayers: Click event to display position shows Uncaught TypeError: Cannot call method 'getLonLatFromPixel'

I have created a map using openlayrs, and put a click event to display its position in screen, when i clicked got an error message like Uncaught TypeError: Cannot call method 'getLonLatFromPixel' of ...
2
votes
1answer
1k views

OpenLayers.Bounds transform not working as expected

I have problem with transforming bounds. It is not working for the first time, later it works just fine. At first i thought that something was still loading butsearching in firebug shows that nothing ...
5
votes
3answers
3k views

Slow IE8 responsiveness with OpenLayers and many features

Background Adding about 700 sites to an OpenLayers Map. Firefox 11 and Google Chrome display the sites just fine. IE8, which is the organization's standard and will not be upgraded for the ...
3
votes
2answers
3k views

Creating a Polyline Buffer in OpenLayers

I was wondering if there was a way to create a buffer around a polyline feature in OpenLayers. I have created a tool that allows the user to draw a circle buffer zone of whatever size and style they ...