Tagged Questions

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

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2
votes
1answer
343 views

Syntax of WFS request in OpenLayers

I am in need of the correct syntax for loading WFS layer using OpenLayers. I have gone through many examples on the OpenLayers site and other examples, but can't figure out how to use the necessary ...
2
votes
1answer
2k 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
4answers
4k 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
votes
2answers
3k 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
28 views

How to change the color of the layer after searching

My task is searching a single house from a layer and then zoom to the center. I did this part but i can't clearly identify this house. I am try to do this by adding a fillcolor to the searched area. ...
1
vote
1answer
454 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
802 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
421 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
405 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 ...
1
vote
3answers
2k 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 ...
0
votes
2answers
65 views

WFS reprojection problems

In geoserver i have a layer in EPSG:4326. In OpenLayers i add it on map as WFS: markerLayer = new OpenLayers.Layer.Vector('Markers',{ strategies: [new OpenLayers.Strategy.BBOX()], ...
0
votes
1answer
153 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
votes
1answer
411 views

OpenLayers controls keyboard shortcuts

I'd like to hook up keyboard shortcuts to my map controls e.g. holding down 'z' will activate the zoombox tool etc. I can't seen anything relevent in the API for doing this. Is it easily done? My ...
35
votes
7answers
5k views

How to create Vector Polygons at the same amazing speeds GISCloud is able to render them?

EDIT (outlining new bounty added): I have added the largest bounty possible to this question in hope of getting a very detailed answer. Your solution should outline a step-by-step guide utilizing open ...
16
votes
4answers
546 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 ...
21
votes
3answers
3k views

Should I use OpenLayers or Leaflet?

I was debating with one of my collegues on OpenLayers v/s Leaflet. I made a point that OpenLayers is much better API if we wish to build a project, where you need direct connectivity to the Geoserver ...
10
votes
6answers
1k 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 ...
9
votes
1answer
7k 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 ...
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 ...
7
votes
4answers
6k 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: ...
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 ...
6
votes
3answers
613 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 ...
8
votes
3answers
906 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 ...
8
votes
2answers
889 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 ...
4
votes
1answer
198 views

OpenLayers and Google Maps when panning tiles not in sync

I want to overlay WMS tiles on Google maps using the following scales 1:287 / 1:573 / 1:1146 / 1:2292 (layer preview in geoserver) I set a bounding box and a centroid for a specific area to set ...
4
votes
1answer
1k views

How to draw Geodesic lines in Openlayers?

Hi i want to display multiple lines between two coordinates. i will pass no of lines and color of the line, it has to display like below image. please see the below image.this is my previous post
4
votes
3answers
1k 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 ...
11
votes
5answers
3k 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 ...
8
votes
2answers
959 views

Openlayers - Losing selection or style on layer redraw

When I zoom or move the map my layer is redrawn. This is what I want, because I have allot of features to load at once. This is the code: wfs = new OpenLayers.Layer.Vector("WFS", { ...
8
votes
4answers
6k 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
9answers
1k views

WMS with Access Control (ACL) for different users? Or solution for thousands of points on web map?

I have a set of Sites in the thousands. Not all users see same the same Sites on the map - thus ACL. Data is stored in a non-GIS database (mssql, ora, etc) and right now is retrieved with a standard ...
6
votes
1answer
1k 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
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 ...
6
votes
2answers
1k 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 ...
3
votes
2answers
233 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
1answer
284 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 ...
3
votes
1answer
337 views

Waiting for Vector & WFS loading

user borrowed from friend since i use vector layer with wfs protocol, there is a little while before features loaded on the map. So i need to tell user to wait a moment until they load. what best ...
3
votes
2answers
2k views

How to get routes and download them from OpenLayers?

I am trying to generate a route in openlayers with a start and end points and some points during track. I read about openroute: http://wiki.openstreetmap.org/wiki/OpenRouteService#RouteLink But I ...
3
votes
1answer
807 views

OL+Geoserver+PostGIS(postgreSQL)

My task is to store the values in the database(postgreSQL) when the user inputs the lat-lon values in the form. and after submitting the form, the map should be displayed with markers at corresponding ...
3
votes
2answers
899 views

Zoom after apply CQL_FILTER in OpenLayers

I apply a filter to one layer and works nice. I want to maximize the bounds where I applied the filter, like this: // mapbounds = array(minx,miny,maxx,maxy) activeLayer = new OpenLayers.Layer.WMS( ...
3
votes
1answer
905 views

Restrict CQL filter to an specific BBOX

I need to filter an OpenLayers layer using a CQL filter to an specific Bounding Box. Is it possible? Something like this isn't working: igh > 5000 AND ...
2
votes
3answers
308 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 ...
0
votes
1answer
2k 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 ...
7
votes
4answers
5k 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 ...
7
votes
2answers
3k views

displaying feature info in a popup

Thanks to Nicklas' anwer to my previous question... I was able to "combine my shapefile and CSV data have made a lot of progress on my project. Now I want to display the attribute data in a popup ...
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
4answers
956 views

Simplify GeoServer WFS output

I am dealing with some large datasets and would like to minimise the amount of data sent over the network. I am using OpenLayers' BBox strategy to only transfer the data that is needed but I am ...
5
votes
1answer
606 views

MGRS in OpenLayers

I am trying to view the Military Grid Reference System coordinates in Openlayers through the MousePosition control. Is there an easy way to accomplish this just through Javascript? I am looking at the ...
5
votes
1answer
2k views

Is it possible to display the length of each segment with the Openlayers measure control?

I am trying to make a OpenLayers measure tool that displays the length of each segment on top of each segment and the total length of the measurement as shown below: I have used this example ...
5
votes
4answers
1k views

The International Date Line wrap around

Using OpenLayers, I added a WFS layer (on GeoServer) with a filter that returns all features (black) that intersect my polygon (yellow) placed over some Latin American countries within certain dates. ...

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