Tagged Questions

JavaScript is a prototype-based, object-oriented scripting language that is dynamic, weakly typed and has first-class functions.

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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 ...
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 ...
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: ...
2
votes
2answers
2k views

Calculate bearing between two decimal GPS coordinates

I'm building a virtual tour application that uses custom panoramas in conjunction with Google's StreetView service. With StreetView, you can have 1 to n links at each particular location to move to, ...
3
votes
3answers
4k views

How to dynamically update a KML layer in OpenLayers 2.10?

Arguably, this is a easy question for you guys GIS expert. Here is the question, how to outsource a dynamic KML file using JavaScript in OpenLayers. I want to refresh every 7 seconds. Below are ...
3
votes
2answers
1k views

Identify all layers on the map without pre-designing the infoWindow

This applies to the ArcGIS Server JavaScript API 2.4. The Identify Task sample shows how IdentifyTask can be used to find features in multiple layers, as specified in the IdentifyParameters: ...
2
votes
1answer
340 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
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 ...
1
vote
2answers
214 views

Spatial query in ArcGIS Javascript Api 3.1

I have scenario in which I have to select features drawing a polygon and and get the attribute values in to a tables or lists.The features on the map consist of polygon, line,point at the same time so ...
1
vote
1answer
450 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
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 ...
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 ...
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 ...
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
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 ...
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 ...
4
votes
3answers
3k views

Using the Proj4js library to convert from Google Maps to projected values

I'm using the proj4s javascript library (based on advice from this question I asked previously) to convert lat/long values on my webpage. This page receives the lat/long values from google maps and ...
3
votes
8answers
6k views

How to create an interactive map with JQuery and HTML?

I want to develop a map in JQuery and HTML. It needs to show world country borders. It must be enabled mouse hover effect and also popup (when mouse over) in which I can add my own text. What JS ...
3
votes
2answers
891 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( ...
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 ...
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 ...
4
votes
2answers
148 views

adding large amount of data [arcgis 9.x javascript api]

I've got problem, I'm creating map based application, and now I have to add to map about 100 000 graphic points, from coordinates. I was trying in many ways to do it, but always process of adding ...
3
votes
1answer
3k 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
2answers
539 views

Turn Popups On/Off in ArcGIS Online Webmap via Javascript API Web Application

I am writing my first ArcGIS Javascript API web map application and consuming a web map authored in ArcGIS Online. The ArcGIS Online web map apparently does most of the work for me in terms of ...
2
votes
2answers
1k views

Querying MapServer using WFS functionality

I'm trying to display a shapefile using OpenLayers and Mapserver. Instead of overlaying it as a png, I want to return a vector, in this case a KML file. My HTML file (located in the same folder as ...
2
votes
3answers
3k views

FeatureLayer creating in javascript ArcGIS API

I got the sample called "Feature Layer with ONDEMAND mode" in the ArcGIS for js resource center. This example just adds layer with rivers to the map. I want to use my own features instead of using ...
1
vote
2answers
1k views

How to initialize a WFS Layer?

Here is the code block (the layers are stored in Oracle database): var saveStrategy = new OpenLayers.Strategy.Save(); var adresspt_wfs = new OpenLayers.Layer.Vector("Address points WFS", ...
1
vote
1answer
612 views

How to unproject coordinates on a Google map with Openlayers?

Below is my code and a pic. When I finish making my circle on a Google map with Openlayers, I get the following coordinates but I want coordinates like E.G: bottom: -27.762124575762 left: ...
0
votes
3answers
3k views

Understanding the polygon handler function in Openlayers

Using openlayers, I want to be able to draw one polygon on a map. After one polygon is drawn, I want an event to fire that stops any more from being drawn until a button is pressed. My current code ...
7
votes
3answers
664 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 ...
4
votes
1answer
254 views

ArcGIS Online without basemap

I am trying to create a Web App, using the ArcGIS Online feature of downloading the javascript code, with the map id being used for connecting to the ArcGIS Online. I was able to do that successfully ...
3
votes
2answers
1k views

Prevent OpenLayers WMS layer cache by browser

I am using OpenLayers (GeoExt) with google chrome browser. All WMS layer is for live database. I have refreshed the browser at certain interval using javascript but the data is cached in browser and ...
2
votes
2answers
370 views

ESRI Javascript API: How to hide infoWindow while using measure tool?

In my Javascript API Web application I'm using the infoWindow to query a parcel layer and display display information in a popup when I click the parcel. I've set this functionality to turn on and off ...
2
votes
2answers
561 views

Does the ArcGIS Javascript API support multiple map service urls per layer?

I've called tilecache from OpenLayers in the same manner as the example below. Is it possible to do something similar with the ArcGIS WMS map layer? var urlArray = ...
2
votes
1answer
549 views

how to download a file from geoserver gml from a url using javascript?

how to download a file from geoserver gml from a url using javascript? I'm doing a web application with javascript, but I could not download files from geoserver, the url given entry does not bring ...
1
vote
2answers
168 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 ...
1
vote
1answer
70 views

How to replace protocol in geoext.form.formpanel‏‏

I've been scratching my head over this and I'm wondering if this is possible. I want to replace the protocol of the GeoExt.form.FormPanel in the following way: to render the formpanel, I defined a ...
1
vote
1answer
444 views

Polymaps + D3+ Polyline with different width and color

I am actually working on a project which involves polymaps and D3. I was wondering if you could help me on this. I have 4 locations and I would like to draw a polyline from one location to other 3 ...
1
vote
1answer
1k views

Resizing and Reshaping features in Openlayers

Resizing and Reshaping features in Openlayers. I have a map with Openlayers and some controls to draw and modify Features. I need to activate the Resize and Drag and Rotate check button fields as ...
1
vote
2answers
886 views

Javascript Api's ArcGISTiledMapServiceLayer won't show map

I am currently trying to show a map that has been tiled. I am using version 10 of the arcgis server, and version 2.5 of the javascript api, the odd thing i am running into is that the map will not ...
1
vote
2answers
426 views

How to prevent label from automatically creating a new line when applying labels to a point feature class? (ArcMap10)

I have a point feature class that I am labelling with the string "EXIT" for a majority of points, but some points will be longer, such as "EXIT into Pacific". I wrote a labeling script that will ...
0
votes
0answers
77 views

Display a single country with OpenLayers

Can I display a single country using Openlayers? I'm not trying to restrict zoom levels or . I want only one single country to be displayed. The rest of the world cannot be displayed. My reasearch ...
0
votes
2answers
336 views

Toggle Visibility of Features in FeatureLayer

How to toggle the visibility of features in a feature-layer using check-boxes .I have grid containing check-boxes in a columns representing each feature in Feature-layer and so if I check off the ...
0
votes
2answers
3k views

Sending xml post request to geoserver

This may be simple question but I can't get started. This tutorial from pen state university has xml request <wfs:GetFeature service="WFS" version="1.0.0" outputFormat="GML2" – we would like ...