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

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Projection Transform in OpenLayers3

I am trying to transform a GeoJSON object of a certain transformation (EPSG:28992) into my current map coordinate system (EPSG:4326). I have been trying to do a couple of things but none seem to work. ...
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2answers
114 views

Javascript + ESRI + Dropdown menu with layers

Dear people of stackoverflow, I have a script that generates a basemap with a layer that I have put on top of it. I am trying to create a dropdown menu in which the user of my HTML5 page can select ...
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1answer
50 views

The ordering of layers with CartoDB/Leaflet

Just want to get a bit of clarity about this query from before: Layer order in CartoDB I have a map with a Basemap and I want to draw points between features based on layer featureclicks, The good ...
2
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2answers
94 views

How to prevent ArcGIS JS map from failing when using a Bootstrap “hidden” class?

I'm trying to put an ArcGIS Server JS API map within a div with a hidden-sm class in Bootstrap 3, so that the map is not shown on small devices. <div class="row"> <div class="col-md-4 ...
2
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2answers
100 views

Javascript API: How can I change renderer on the fly with feature layer hosted on ArcGIS Online?

I am new to Javascript and somewhat new to GIS (especially web applications of GIS). I'm trying to understand how I can have a drop down menu or html buttons to change which data is rendered in my ...
2
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1answer
159 views

How to center the map to a KML placemark with OpenLayers 3?

I'm using OpenLayers 3 to display my KML layer on the map. My KML contains two placemarks, one contains a linestring of waypoints and the second one is a point, like this: <kml ...
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1answer
73 views

Configurable Map Viewer (CMV) - average the values of the points

I have been able to select points and find the sum of the points. What I really need is to average the points. Here is my (acquired from someone else) code for finding the sum. define([ ...
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35 views

Legend label failed to send to the print service using ArcGIS javascript

I am try to print my map with legend to PDF format; however, the legend label in the PDF is saying Override 1 instead of the label I specified in class breaks. There are other maps I can print ...
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1answer
89 views

Configurable Map Viewer (CMV) - select by drawing polygon around points, then average the values of the points

I have seen this question and have tried the code suggested: Adapting ESRI ArcGIS API for JavaScript Feature Layer With Selection sample for use in Configurable Map Viewer (CMV) But I have been ...
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2answers
141 views

Automate testing of web app based on ArcGIS JS API

So, there are multiple products that can let you automate testing interaction with web pages. I have used Selenium IDE for some time now and it works great for creating unit tests for HTML elements on ...
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1answer
69 views

Showing link for every city at different zoom levels using Leaflet?

I have a Leaflet map that I am using to render a map of the U.S. The map will have specific zoom levels. For example, when the map first loads it will show major U.S. cities. Then if you zoom in it ...
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2answers
90 views

Create a layer selector when making a map at runtime for CartoDB

Using the same theory to create a search box at runtime, (such as here), I wrote this code: var l = cdb.vis.Overlay.create('layer_selector', map.viz, {}) l.show(); $('#map').append(l.render().el); ...
2
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1answer
93 views

SQL query as part of featureClick in CartoDB.js

I am a complete novice at both Javascript and SQL so am learning as I'm going with this! I have made a webpage that shows a map with a layer of points on the left hand side of the page. What I want ...
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1answer
248 views

Leaflet.js add/remove control from Map

I am attempting to combine two fine plugins Leaflet Easy Button and Leaflet Routing Machineand i can't quite get it to work. what I want seems simple enough, I would like to have a button that when ...
2
votes
1answer
29 views

Toggle Layers in OpenLayers does not work

I am trying to make a map in which I can toggle layers on and off in the navigation bar. A simple version of my code is in the following JSFiddle: http://jsfiddle.net/TimLucas/3cqsmc2L/ If you click ...
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1answer
60 views

Converting VBScript to JavaScript for labelling in ArcGIS Desktop?

I have a VB script used by ArcGIS 10.2 for Desktop to label different types of streets based on vales present in a specific field. I am a novice at Python but VB and JavaScript are beyond me. I need ...
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1answer
145 views

ArcGIS javascript API setDefinitionExpression returns wrong result set

New to GIS and ArcGIS. I am trying to use the javascript API setDefinitionExpression to limit the output of a FeatureLayer on the map; however, the result set returned by the function is incorrect. ...
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1answer
380 views

select tolerance or snapping in OL3 (Openlayers 3)

I'm using openlayers3 in a mobile application , my problem is that I find a big difficulties to select features using my finger even with a touch pen (I have to be more precise in my click or ...
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1answer
229 views

refresh the map Ol3 (Openlayers3)

Hello I'm using ol3 in a mobile hybrid application using sencha touch2 , so I start by drawing a polygon inside a map , after validating this drawing I redirect the user to an other form in order ...
2
votes
1answer
115 views

Choosing a platform for developing opensource GIS web application.

I am from a non programming background. I started learning GIS opensource web applications from last 3 moths. Now I am using only notepad++ for writing codes and I am familiar with javascript, HTML ...
2
votes
0answers
70 views

How to adapt layerswitcher to include listboxs

For my project I needed something that allowed the user to change the application´s layers and the best solution I found was this one layer switcher since openlayers 3 does not support a layerswitcher ...
3
votes
1answer
170 views

How to reference the ArcGIS Server JS API using RequireJS

When using RequireJS to load a JavaScript library from a CDN, an example syntax is shown at https://github.com/requirejs/example-jquery-cdn: requirejs.config({ "paths": { "jquery": ...
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1answer
381 views

Line dash not working OL3 (Openlayers 3)

I want to display a dashed line in a vector layer, as the it's shown in the Documentation there is a propriety called lineDash , but it didn't work for me here my code : var iconStyle_line = new ...
3
votes
2answers
194 views

ArcGIS Javascript API on Wordpress 4.1

SOLUTION: For everyone interested: turned out the solution was moving all files that use DoJo beneath the jQuery UI files, so that jQuery UI is fully loaded before any DoJo stuff loads. Moved them all ...
2
votes
1answer
121 views

OpenLayers3: setCenter seems not to work in jsfiddle

I'm trying to replicate an example from the OpenLayer Examples, specifically this one: http://openlayers.org/en/v3.0.0/examples/animation.html The problem is that in my jsfiddle I cannot get all the ...
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0answers
66 views

Getting coordinates perpendicular to AB

I noticed that Google Mapmaker has a function that when you hold shift when drawing a shape you can see the perpendicular line. I want to recreate this function to use in the google maps api v3. So ...
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0answers
153 views

Error with GeoExt.data.WMSCapabilitiesStore + gx_wmslegend

When I use this code (code in bold means for comparison between codes): // create a new WMS capabilities store store = new GeoExt.data.WMSCapabilitiesStore({ url: ...
3
votes
0answers
77 views

What is the openlayer.js alternative of unloadinvisibletiles of leaflet.js

I am using open layers with a tile server. I want to load maps while panning and destroy the loaded region when out of screen (Alternative to unloadinvisibletiles of leaflet.js) How am i suppose to ...
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0answers
358 views

Disable doubleclick zooming in Openlayers 3

I've searched for it on the entire web and finally I found on artamstrong.com how to disable a single feature like "mouseWheelZoom". Here is how double click zooming in Openlayers 3 can be disabled: ...
-1
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1answer
53 views

How to remove WMS layer from OpenLayers

How to remove added WMS layer from OpenLayers ? I have seen a link here.But I did n't get clearly. Please help? I have added the WMS layer as follow <script ...
0
votes
1answer
32 views

PyWPS output created but not accesible by the Javascript client

The good thing: I've a working PyWPS process. The bad thing: I cannot access the output using the PyWPS Javascript client. What I did. I created an PyWPS python script with one LiteralInput ...
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0answers
30 views

'select' listener in xtype combo, scope issue with IF?

I wonder if this is a problem of scope. The thing is that I select an option in a xtype combo (extjs3.4) and that selection at first can be read outside and inside an if section (attached image). Now, ...
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0answers
34 views

Run a locator task

I'm working with ArcGIS javascript api and I have a search function that finds a persons address by name and sorts it into a table inside a modal popup. It returns multiple people with the same name. ...
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2answers
496 views

OL3 Style function

I am attempting to write a style function within an open layers 3 application that will change the fill color of a circle based on an attribute from a geoJSON piece of data. I have looked over stack ...
5
votes
2answers
88 views

Access geojson from github in leaflet

I am new to json, github, and leaflet. But I am trying to create a simple application which will render my points which are in geojson up on github. From everything I have read this should work. ...
1
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0answers
73 views

styling wms layer using sld in openlayers3

i want to style wms layer using sld in openlayers 3.written part of code shown below.but not any console error messages are shown and not applied styles to layer..... var sld = ...
0
votes
1answer
88 views

Legend in GeoExt.tree.LayerContainer

Using the code below in this jsfiddle example: tree = new Ext.tree.TreePanel({ renderTo: "tree", root: new GeoExt.tree.LayerContainer({ text: 'Map Layers', ...
4
votes
1answer
90 views

How to use external CartoCSS/mss within JavaScript?

I am using CartoCSS to style features in a run-time CartoDB layer (as opposed to a pre-made visualization) but it gets messy doing this within JavaScript: sublayers: [{ cartocss: '#initvisitedfws ...
1
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1answer
175 views

Geoserver WFS GeoJSON layer in Leaflet, having trouble diagnosing 'Uncaught TypeError: undefined is not a function (Anonymous Function)' error

Pardon me if this has been addressed, I searched as far as I could for similar errors. I'm trying to serve a large amount of polyline data as a geoJSON layer from GeoServer to a Leaflet instance. ...
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0answers
108 views

library for minimum bounding box “by width” in javascript or python

I'm looking for a library (or at least a code snippet) to calculate the minimum bounding box "by width" in javascript or python. Below is an illustration from the ArcGIS documentation of that ...
1
vote
1answer
81 views

Openlayers 3 circles from geojson not working with layer tile source different from TileWMS

I am working with openlayers 3 with a layer from mapbox or openstreetmap and I need to draw some circles on it. I am able to print the circles with a view with a projection EPSG:4326, but then I have ...
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0answers
56 views

Create Popups With Multiple WFS Layers

I am having trouble displaying popups on points plotted on my Open Layers 3 map from two different WFS sources. Both are PostGIS tables coming from geoserver. var popup = new ol.Overlay.Popup(); ...
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votes
2answers
85 views

Can I include data from multiple rows in CartoDB infowindow?

I have a visualization in CartoDB of a set of data points in table pointlayer. I am using cartodb.js and have a nice map for browser consumption. When a user clicks on a point, I'd like to run a sql ...
0
votes
1answer
114 views

Converting area of a polygon from steradians to square kilometers using D3.js?

How can I find the area of a polygon in square km using D3.js? I'm not even really sure whether to use d3.geo.path.area or d3.geo.area. Here is my code (JSFiddle): var d = { "type":"Feature", ...
4
votes
1answer
138 views

Legend items to appear / disappear simultaneaously with Layer turned on/off in Layer Control

I have a number of layers that can be turned on and off with a Layer Control. I’d like the description of each layer to show in the legend if it's turned on. And disappear again as soon as the layer ...
0
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1answer
98 views

Different results of fullscreen mode in OpenLayers 3

anyone here have already met similar problem like me? My original application is not viewing correctly (in all browsers) in fullscreen mode, which is openlayers 3 functionality. The problem is with ...
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1answer
94 views

OpenLayers 3 get map by id or class?

How can I get hold of a OpenLayers3 map object associated with a specific id or class (unique)? I searched and found this thread, which says something like: var map = ...
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0answers
56 views

single quote escape for arcgis server rest query

This might possibly belong in stack overflow so let me know if I I should go there instead. I'm trying to create a simple query using the arcgis rest api and javascript. I think my problem is with ...
0
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2answers
105 views

How to use cartodb.js without storing sql in javascript

Using cartodb.js, how can I change the layer definition without building the sql dynamically in javascript and passing it as a parameter. Aside from revealing my table structure (not a huge deal at ...
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0answers
48 views

Displaying a graphic layer derived from an arcgis server geoprocessing task on a webapp map

I know this should be basic.... but I am trying to get an ouput from a arcgis server geoprocessing task of data type "GPFeatureRecordSetLayer" to be added into a map on a webapp. here is the code (the ...