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

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1answer
3k views

How to overlay WMS layer on OSM maps?

I am using OSM/Google maps and WMS Layers. Now I want to know how my WMS will overlay on this map. I am using the following code for that: function init() { map = new ...
2
votes
3answers
4k views

OpenLayers WFS protocol: work with filters if the protocol is defined out of layer constructor

follow question:wfs-load-feature-check the scenario is: i am trying to load a WFS layer, since it takes a while to load all features, I want to give user a notice while waiting for response. the ...
2
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4answers
7k views

How to use Google Maps V3 Geocode with Openlayers

How to use Google Maps V3 Geocode with Openlayers. Below is my code but the function does not execute when I try to integrate it with Openlayers. This works with my original google v3 file. Below is 2 ...
2
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2answers
4k views

Access-Control-Allow-Origin error in web map

I am having trouble getting a WFS layer working using Geoserver, OpenLayers and GeoExt. I get the following error: XMLHttpRequest cannot load http://10.0.0.155/geoserver/wfs. Origin ...
1
vote
1answer
190 views

Display data from geoserver on click map with openlayers

I tried to display data with popup from Geoserver or Postgres to my map, but it dosen't work at all. Can anyone please help me? I used this code: function Info(e) { if ...
1
vote
1answer
707 views

How to insert a list of parameters from a parametric view in OpenLayers?

After successfully (with the precious help of members from stackexchange) creating a Geoserver parametric view that works as it should, now i'm facing another problem: How to pass a list of parameters ...
1
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2answers
4k views

OpenLayers Select a feature from attribute or id

Using Openlayers.....Is it possible to select a feature on a map by an attribute? eg: Select a feature from a dropdown menu populated with the feature "id" or a table field attribute values.
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2answers
688 views

OpenLayers.Class with OpenLayers.Control.GetFeature

I'm wondering if someone could point me in the right direction to force the BBOX of OpenLayers.Control.GetFeature to be always in long/lat coordinates. I'm trying to get this with OpenLayers.Class, so ...
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vote
1answer
2k views

Modify WFS with OpenLayers

I want to edit object on WFS layer but have one problem. I use OpenLayers.Control.ModifyFeature(myVecLayer) to editing.By the logic i do this. Press button and create WFS layer with chosen object ...
1
vote
1answer
753 views

GeoServer WPS Aggregation Functions Example

The scenario: I want to present a user with names of polygons from a layer in GeoServer. I then display the polygon(s) whose name(s) the user selected. What I've done: I have a search box, which ...
1
vote
1answer
600 views

Unproject Radius with Openlayers with CRS:84 Projection

I have made a Openlayers integrated map that lets you draw a circle, On completion of the circle I have told the map to give me , Bounds, Center Long and Lats, and lastly the radius. My problem is ...
0
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0answers
124 views

Proxy.cgi for OpenLayers reading from GeoRSS but not from WFS

I'm having trouble with the standard proxy.cgi written in Python for OpenLayers. Here's my code: #!C:/Python27/python.exe -u """This is a blind proxy that we use to get around browser restrictions ...
0
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0answers
96 views

Standard tile origin coordinates for EPSG:3857

Is there a standard tile origin for caching tiles in EPSG:3857? For example OpenLayers as default uses this tile origin for a WMS in mercator projection: lon: -20037508.34, lat: -20037508.34
0
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1answer
1k views

cross domain problem with :OpenLayers.Protocol.HTTP

this code works with local kml files, but not when the kml files are on my other server, I got 3 error : OPTIONS http://192.168.0.150:9000/files/anonymous/AVGHDOP.kml 404 (Not Found) ...
0
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1answer
350 views

How to convert drawn vector feature from EPSG:900913 to EPSG:4326

My script allows you to drawn shapes on an openlayers map, and then to get the WKT information from that shape, except the returned coordinates are in 900913 and i need them to be in lat/lon. thanks
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3answers
805 views

KML attribute data on onload of html page using openlayers

How to get KML attribute data on onload of html page using openlayers. This is kml file: click here to get kml file Any help is appreciated. Thanks in advance.
0
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3answers
4k views

How to store an image in PostgreSQL and display it in an openlayers popup?

This is question regarding storing of image in PostgreSQL and display in openlayers popup through geoserver(using wms service). PostgreSQL is installed in my virtual machine. I tried to store image ...
0
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1answer
1k views

openlayers- WFS- Cross-domain problem

I got the typical cross-domain problem when access to WFS layer by using openlayers, XMLHttpRequest cannot load http://XXXX/geoserver/ows?service=WFS. Origin http://XXXX is not allowed by ...
20
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6answers
3k views

Creating a small web-mapping/map-tiling service

I am looking for a small-scale and easy way to present one or more polygon shapefiles online (on a municipal website without any existing map-server infrastructure, to be precise). Right now, I'm ...
16
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4answers
737 views

Advice on a generic open-source package roadmap

I just wanted to ask an advice from the open source GIS gurus on a recommended stack to use for my envisioned project, as I do not fully understand the limits of the possible with most packages. I ...
13
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7answers
1k views

Comparing two maps with nice web interface?

Is it possible in Leaflet or OpenLayers to compare two maps with a bar to slide between the two? Examples include: ...
14
votes
1answer
19k views

Programmatically creating a vector feature in OpenLayers

I want to create a vector feature, programmatically, on my map. It's supposed to be in the A4-paperformat, for showing a sort of print preview. I've created a control for handling this, but now I'm ...
10
votes
6answers
2k views

Should I use a CMS for my web mapping application?

For my web mapping app, I am using GeoServer as server, PostGIS as spatial DB and OpenLayers on client side (as well as other JS libraries). The map is composed of base maps and vector layers. One of ...
7
votes
2answers
11k 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 ...
9
votes
6answers
15k 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 ...
9
votes
3answers
1k views

Best way to animate radar data in openlayers

I have a project using OpenLayers which displays radar data on a map. The radar data itself is just a bunch of polygons each of which is filled with one of 6 possible colors. The goal is to animate ...
7
votes
4answers
9k views

How to select fields returned by GeoServer WMS GetFeatureInfo request?

I'm running simple local mapping service based on PostGIS/GeoServer/OpenLayers stack. Following opengeo tutorial I've tied click events in OpenLayers to WMS GetFeatureInfo call using: ...
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 ...
11
votes
3answers
951 views

Web mapping software for a huge raster time series?

I'm an ArcGIS Desktop user who is stepping into the world of web mapping for the first time. Following advice I found here on GIS.SE, I started with the free tutorials from OpenGeo. However, I ...
9
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2answers
2k views

Map hosting options

I'm trying to figure out how to best get started on a web-mapping project, and am wondering about where I should host my maps from. In terms of my skills, I'm quite good at desktop mapping and ...
6
votes
3answers
2k views

How to generate a thumbnail of an openlayers map?

I would like to allow the user to generate a thumbnail image of what the user is seeing in the OpenLayers map canvas so the user may print, save, share, email, or whatever. Any ideas of how i would ...
6
votes
1answer
2k views

Using local mbtiles in openlayers?

--The problem-- I've successfully added mbtiles from Mapbox free online source to OpenLayers, but cannot figure out how to get the mbtiles I've created/stored locally to show up in OpenLayers. --The ...
6
votes
2answers
2k views

OpenLayers filter: OGC (xml) or CQL?

While having not used filtering that much in OpenLayers, we are discussing which type of filtering we should use: The OGC XML filter or the more simple CQL filter? Are one of them more appropriate ...
5
votes
4answers
1k views

Where to start with Web GIS development, or which technology to select?

I am very new to GIS development, and to be be frank I have no background about it at all. I searched the web but the tutorials I found seemed to assume the reader has some background information. ...
5
votes
1answer
1k views

Maximum number of Tiled Layers in Open Layers

I'm developing an OpenLayers site where the client wants a dozen layers that can be individually turned on and off, which is a bit of a bummer in terms of performance. The data is PostGIS and static ...
4
votes
1answer
455 views

What is the best practice to show GPS movements on map (Openlayers or Leaflet) using DB and Geoserver?

I have GPS unit which update the DB with Points every 10 seconds. I want to show the position in real time (as much as I can) on map using OL or Leaflet. What I did is serving the Point as Layer in ...
3
votes
3answers
1k views

How do I edit info feature attributes in GeoServer with OpenLayers

Can you help me? I have a very difficult problem when doing project... I have used OpenLayers and GeoServer. When I click in the map to get feature info, I receive the info for the feature and ...
3
votes
2answers
486 views

Design question: what's the role of WFS-T in this kind of webapp?

I have more experience in "traditional" (Java EE) webapp development, and I am trying to figure out a decent design for a mapping web application. My application has a map, and users can see and edit ...
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 ...
3
votes
1answer
5k views

SelectFeature with Double-Click

I have the ability to select features on the map with a click using OpenLayers.Control.SelectFeature. How can i add a double-click handler to that? I have tried modifying this code to suite my needs, ...
2
votes
1answer
1k views

Unable to see whole world map by decreasing panzoom bar?

I am seeing one weird thing in Openlayers today. I am unable to see whole map by using panzoombar, previously i used to. <html> <head> <title>OpenLayers Example</title> ...
1
vote
1answer
3k views

Openlayers get coordinates of a circle vector after draw

I have made a openlayers map. I have made two features on the map. Navigate DRAW POLYGON I have made 40 sides to my polygon which turns out to be a circle. After I have drawn my circle I want to ...
17
votes
4answers
16k views

How to define layer order in Openlayers?

I have a marker layer, two vector layers and two raster layers. The marker layer gets covered by the two raster layers. Is there a way to move the marker layer always on top? Edited: The order of ...
13
votes
6answers
7k views

How to use ST_Intersection?

Here's a quick summary about what I'm trying to do: I have 3 tables in Postgres, 'a' and 'b', each have a Polygon column, and 'c' has a Point column. What I'm trying to do here is to get the ...
9
votes
4answers
11k views

How do I get the coordinates of a click on vector feature/layer in OpenLayers?

I need to get the coordinate of the click when the user clicks on a vector feature on the OpenLayers map. The SelectControl only gives the feature that was clicked and not the coordinates of the ...
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.
8
votes
2answers
991 views

How to preserve topology while editing polygons in OpenLayers?

I’m facing this issue: I have a chloropleth map based on a set of polygons with some data. Using WFS-T (postgis, geoserver, openlayers) I am able to edit the geometry of the polygons. This works fine. ...
8
votes
4answers
8k views

How to Dynamically refresh / reload a KML layer in OpenLayers

I have previously asked this question to no avail so I thought putting this up here would be a good idea. Here is an example on: How to Refresh / Reload a KML layer in OpenLayers. Dynamic KML Layer. ...
7
votes
4answers
1k views

Splitting Linestrings on the dateline with OpenLayers

A couple of years ago I posted a questions titled "The International Date Line wrap around" @jdeolive suggested I split the features at the dateLine. So I tried. So when I try to split my satellite ...
7
votes
4answers
2k views

Is it possible to put Geoserver behind a proxy and access the WMS/WFS using OpenLayers

I just start to work with Geoserver and Openlayers and one of the main concerns of the project now is do not expose the geoserver web interface outside of the internal network. No access to ...