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

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2answers
778 views

Generating Values in the Attribute Table

In the attribute table within GIS, I have a certain column with ascending values, and I want to assign ID numbers (for easier readability and display) to a corresponding column. So for instance: Feet ...
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1answer
367 views

OpenLayers - Resize a point on zoom out?

I need to resize a point on zoom. When you deep zoom the point get larger and on zoom out the point is smaller. In fact, the post here - How to resize a point on zoom out? seems to have exactly ...
0
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1answer
608 views

Seeking ArcGISTiledMapServiceLayer Sample

I'm trying to use ArcGISTiledMapServiceLayer to show a cached set of image tiles on our local server. There is good help on the arcgis developer's site but I can't seem to find good examples. None of ...
3
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2answers
244 views

How to display information in a div outside the map?

I tried a bit around and created a simple map with two polygons(most of the code I got from the Interactive Choropleth Map Tutorial). I added a "L.control()" to show information about the polygons in ...
3
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1answer
551 views

leaflet choropleth map using dynamic value

I am doing a choropleth map using leaflet and JSON data. I got a clean tutorial in leaflet site. In that tutorial the used us-states.js JSON file where the choropleth was based on the feature....
0
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1answer
339 views

Add hour and seconds to CartoDB/Torque animation

A while ago I made a CartoDB/Torque animation that displayed hours and minutes while playing. Sujay v. helped me out with the code here: https://groups.google.com/forum/#!topic/cartodb/xpxF4fSV7ZI ...
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1answer
237 views

Limits to torque and cartodb

Bit of a theoretical one this, but I was wondering if anyone had tried to use CartoDB and Torque with any big(ish) data. What I am talking about is having the location of 75,000 people at 1 minute ...
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1answer
599 views

Change coordinate system using SQL or Javascript

Is there any built in function in SQL Server 2008 R2 which can transform the cordinates from 102100 to 4269 coordinate system something equivalent to ST_Transform from postgres. If there is algorithm ...
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1answer
804 views

Google Maps V3 + multiple Fusion Table layers = inconsistent markers?

One of my colleagues is working on a map for a news story and is having some difficulty getting the markers to consistently show up. Changing the order in which the layers instantiate is causing ...
2
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1answer
3k views

How to add a legend and toggle the legend with a layer in Openlayers?

I'm currently trying to add a legend to my map and to show/hide it, when the corresponding layer (an image layer) is shown/hidden. My approach was to add a custom button with a .png of my legend. That ...
3
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2answers
494 views

Openlayers map WMS stretched by latitude

I am working on a small javascript application for displaying map with WMS layers from 2 servers. The problem is, that image is stretched by latitude, it is wider, as it should be. This is is how it ...
2
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1answer
957 views

ESRI JS API Can I attach other events to to the map object

I asked this over on the ESRI forum but it didn't get any traction. I have an app that I'm designing specifically for mobile. At one point in its usage, a user needs to pan and zoom to a location and ...
2
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2answers
3k views

Increasing OpenLayers Max Zoom Level

I develop HTML pages by using OpenLayers, which pointing to a local GeoServer WMS service. On displaying a layer, it stops at its available max zoom level, but it is still too small to manipulate (a ...
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1answer
3k views

Keep marker constant on Google Maps Javascript

I want to be able to keep a marker constantly in the center of Google Maps on my mobile application. I have tried using bindTo functionality of Google Maps, which binds the marker to the center of ...
2
votes
1answer
439 views

Can individual feature properties be retrieved from the CartoDB.js API?

I'm building an application that uses CartoDB to show users how a proposed redistricting plan would affect them. The user enters an address and that fires a ST_Intersects query to CartoDB, the result ...
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0answers
15 views

How to sync multiple OpenLayers maps on same page? [duplicate]

I have 4 maps in one page and want to sync them (zoomend and movened). This is what I ahve done so far: Approach 1: sync(map[0], map[1], map[2], map[3]); sync(map[1], map[0], map[2], map[3]);...
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0answers
274 views

How to create a color ramp to change the color of a svg image in arcgis javascript api

I have a svg image to create a PictureMarkerSimbol for a feature. How to create a color ramp to change the svg color based on a criteria, like a attribute on my feature? The ideia is like that: var ...
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1answer
2k views

Convert GeoJSON form EPSG 3857 to 4326 with JavaScript [duplicate]

Given a GeoJSON in EPSG3857: { "type": "Feature", "properties": {}, "geometry": { "type": "LineString", "coordinates": [ [ -13720479.997764934, 5688254.733325758 ...
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1answer
444 views

Mapbox markerLayer from GeoJSON with prompt as input not working

I am trying to display a pin on a map. It works fine if I code the GeoJSON data into the script of my file. If I try to insert the GeoJSON data via a user prompt, it doesn't work. The variable must be ...
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1answer
151 views

cannot click on points in openlayers

I use openlayers 2.13.1 along with Geoserver and PostgreSQL I have a code for a vector layer , in my openlayers like so //style for layer var style_d = new OpenLayers.Style({ 'fillColor': '${...
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1answer
677 views

OpenLayers - markers not displayed

I just started worrking with OpenLayers and hava a problem with markers that don´t appear. I have no idea where is the problem. <script type="text/javascript"> function init() { var center ...
2
votes
1answer
82 views

Why aren't my basemap tiles showing up via ArcGIS Server

I have a leaflet js script referencing the ArcGIS server imagery api. The code worked fine up until about two days ago. Now when I click on the layer there's a gray background. I am using my local ...
6
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1answer
185 views

Making a 3D map with shapefiles, lidar and aerial image data

I want to try to make a simple 3D map for a small area (10 square miles) with some housing, some roads and some vegetation on it. My geodata is as follows: shapes with houses/roads/vegetation. ...
2
votes
1answer
809 views

How to display labels - created using LabelLayer only at certain scales

I am using ESRI Javascript 3.7 framework to develop a map application, in it I am trying to display labels created using LabelLayer at certain scales only, say from 1:1 to 1:500 scale only, how can I ...
0
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1answer
285 views

How can I extend L.mapbox.legendControl?

I'm trying to override legendControl.onAdd, but I can't seem to do it early enough. I can override the other functions, since they're fired after map init, but I can't seem to change the prototype? ...
1
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1answer
400 views

How to call Leaflet FullScreen plug-in from code

I'm currently using Leaflet along with leaflet.fullscreen to provide a full screen map. I've got it working nicely with the button but I can't work out how to "call" the function manually from my ...
1
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1answer
768 views

How to improve speed of rendering polygons from Postgis in Leaflet?

I want to improve speed of rendering polygons in my Leaflet map. Polygons are stored in Postgis, and are rendered with select query with bbox. I wonder can I cache somehow those polygons? I read ...
0
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1answer
770 views

Call function inside dojo.ready

I have code ArcGIS Javascript like this: <script type="text/javascript"> require(["dojo/ready", "dgrid/OnDemandGrid", "dgrid/Selection", "dojo/store/Memory", "...
3
votes
1answer
794 views

SVG control not visible on top of Leaflet.js

I'm using Leaflet 0.7.1 and want to draw a radial menu (like openstreetmap's iD editor) on top using d3. Some examples I found use Leaflet's overlayPane to append the svg element to: var svgContainer=...
0
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1answer
211 views

Is there any Map event fired when map is loaded completely when we device is oriented from portrait to landscape mode?

We are using ESRI ArcGIS JavaScript API in one of our Mobile web app. When map is loaded first time, Onload event is fired. But when we change orientation from Portrait to Landscape, OnLoad event does ...
0
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1answer
712 views

Filter Vector Layer Features

I'm using OpenLayers - 2.11,GeoServer 2.13, ExtJS 3.4, and Java for developing GIS based web applications. I have added some point features in one vector layer. It has id, name, address, etc. Can I ...
1
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1answer
632 views

ArcGIS Javascript Map loads but doesn't display

I just started creating a very simple mobile GIS app using ArcGIS Javascript API, and I have experiencing a very peculiar issue. When the app loads, the basemap is white (not visible) until you use ...
2
votes
3answers
2k views

How to add png image with esri javascript api MapImageLayer Class?

I have a png image that we host that I need to resize and overlay onto a map at specific gps coordinates. Would this be an image class? I can't seem to find any examples that match up with my needs. I ...
0
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1answer
52 views

How do I change my title of app?

We have a map with streets as basemap. We have been trying unsuccessfully, for the last two days to change the basemap to tiled layer with no success at all. I am posting a snippet because script is ...
1
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0answers
1k views

openlayers 2.13.1 vector layer and CQL does not work in IE11

I have implemented a search functionality for a vector layer in openlayers 2.13.1. I use CQL. I take the values from an html form and I use javascript to pass them to a CQL filter and execute it. ...
1
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2answers
862 views

Display photo in GeoExt popup

I have point feature with name PointPhoto. This feature have attribute: id area PhotoPath Now I am using GeoExt popup to display this attributes, but I cant find a way to display image from ...
2
votes
1answer
24k views

Uncaught SyntaxError: Unexpected token : when using ajax

I try to call json data from geoserver, but when i try to run it in chrome, it return this following error "Uncaught SyntaxError: Unexpected token :" This is my code, function initialize(){...
0
votes
2answers
2k views

A script on this page may be busy, or it may have stopped responding

I'm using OpenLayers - 2.11,GeoServer 2.13, ExtJS 3.4, and Java for developing GIS based web applications. Recently i'm getting below error message in my application "A script on this page may be ...
0
votes
1answer
157 views

TabContainer ArcGIS API for JavaScript

I am a novice programmer, but I know enough to be dangerous. Here's my issue and hopefully someone knows the answer. I am developing an application with 4 tabs on the left and a map from ArcGIS ...
4
votes
1answer
5k views

add marker to map from list of coordinates

Forgive me if this question has an incredibly obvious answer. I'm very new to ESRI and I'm trying to add markers to my map via gps coordinates. I have not found an example that does something this ...
1
vote
1answer
215 views

GWT-OpenLayers - BoundingBox selection

I'm searching for a way to get the bounds of a bounding box a user can drag on a map with gwt-openlayers but i can't figure out how to translate the javascript stuff to the javaside of the wrapper ...
-1
votes
1answer
650 views

My wms vector data overlay on openlayer vmap work fine but on osm img is not rendering

i am try to overlay my India roads vector over an openlayer (http://vmap0.tiles.osgeo.org/wms/vmap0) vmap work fine.but i want to do the sam task over osm(open street map), i am trying many different ...
0
votes
1answer
267 views

Chorpleth Data visualization in Mapbox Leaflet API

I am using Mapbox Leaflet API. I have followed the following tutorial of Mapbox. https://www.mapbox.com/mapbox.js/ (Please change to Data visualization Tab) Onclick its zooming on state and hover ...
0
votes
1answer
189 views

Visualizing information when click in polygon‏ - Spatial join

I am new to cartodb, right now I am trying to do something similar to the cartodb tutorial: Create your first map with CartoDB.js, but with polygons using my own map. For example: I did a spatial ...
8
votes
1answer
5k views

Zoom further in with leaflet javascirpt API

We're using the leaflet JavaScript API with a tile layer which supports zoom level up to 19. I'd like users to be able to zoom further even if the tiles blur as they have to place markers to a high ...
0
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1answer
128 views

What must be learned to build 3D web map? [closed]

I wish to build a 3D web map based on Silverlight or JavaScript. I cannot build 3D in Silverlight. What I should do then? Should I learn "Balder" or OpenGL or what? I must do it before 09/2014. Can ...
2
votes
1answer
326 views

How to use right-click to finish drawing a Polygon in OpenLayers?

I'm using OpenLayers 2.13 and the DrawFeature control. By Default, the Polygon is completed, when you double click. Some of our clients are requesting that we allow the mouse right-click, to finish ...
1
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0answers
28 views

How to hide infoWindow while using measure tool and showing it back after using it ArcGis JavaScript API [duplicate]

I have an infoWinfow set on the click event of the map. I want to disable this event when I'm using the measurement tool and then enable it back after the measurement tool is used. So far I've done ...
2
votes
2answers
2k views

CartoDB- Passing selected features bounds to map center parameter (Zoom to selected features)

Looking to build a light-weight viewer for some data we have hosted on CartoDB. I'm looking to have a user input their address into an input, pass a query to CartoDB and have the map zoom/pan to the ...
3
votes
1answer
4k views

How do I set the fillcolor of polygons in Leaflet.js dynamically?

I'm using the interactive chloropath example for leaflet.js I figured out how to make each of my polygons add a running tally of values to the bottom of the page after each polygon is clicked. Upon ...