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

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190 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
100 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 ...
1
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0answers
729 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
383 views

How can I dynamically restrict pan extents on an image layer in OpenLayers 3?

I have been sandboxing with OpenLayers 3 and thus far have been happy with the results. I have used answers on this site to restrict my most zoomed out level from panning and to restrict the range of ...
-1
votes
1answer
90 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
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1answer
46 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
49 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
36 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
924 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 ...
6
votes
2answers
124 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
123 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
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1answer
138 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', ...
5
votes
2answers
144 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
vote
1answer
218 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
167 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
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1answer
131 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 ...
1
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0answers
75 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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2answers
549 views

OpenLayers3: How to reload a layer from GeoServer when underlying data change?

I have a webpage that displays a GeoTIFF served via GeoServer as an OpenLayers3 ImageWMS layer. What I need is to (via a button) reload the OL3 layer after the underlying GeoTIFF changes. I searched ...
0
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2answers
133 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 ...
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2answers
184 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
220 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
162 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 ...
0
votes
1answer
243 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 = ...
0
votes
0answers
79 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
148 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
76 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 ...
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0answers
248 views

Leaflet vs Openlayers vs Geoserver for overlapping polygons application

I have 3 layers of vector polygons(about 80 polygons - 1MB geojson each but I haven't simplified any yet) displaying school territories (kindergardens, primary and secondary education) and I want to ...
2
votes
1answer
89 views

Create Chart from Query Task

I need to create a chart from the result of a query task using Esri JS API. Note, the chart does not have to be created with Esri API, but the query runs in that. The result is written to the DOM ...
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0answers
16 views

line chart similar to Esri Histogram Time Slider [duplicate]

I am looking for a solution similar to the one provided by the Esri DIGIT class "HistogramTimeSlider" but instead of a histogram, I would like to use a line chart. Anybody seen a suitable reference?
1
vote
1answer
183 views

Openlayers dynamic viewport width and height assignment

I display an openlayers map in a html page by placing it in a tag and assigning a css class to it so as to set its dimensions (map size and map bounds). i then attempt to dynamically create a style ...
0
votes
0answers
92 views

How to Show the Lat/Long of Marker in a Textbox if it has been clicked

function getInfo() { $.getJSON("get_info.php", function (data) { for (var i = 0; i < data.length; i++) { var location = new L.LatLng(data[i].lat, data[i].lng); ...
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0answers
54 views

How to add 'title' or tooltip to navigationHistory in openlayers

I want to add tooltip/title to NavigationHistory Control in openlayers. I tried 'title' property but its not working. My code is var pDiv=document.getElementById("maptools"); var ...
3
votes
1answer
248 views

How to get/pass token with ajax call to secured ArcGIS REST Service

I have a web map application that was written in HTML & JavaScript (using the ArcGIS JavaScript API). It desplays a few services that reside on an ArcGIS Server (10.2). It also has a custom legend ...
2
votes
1answer
199 views

Using Odyssey.js with Cartodb.js

I'm looking to use Odyssey to create an interactive introduction to various data layers on an interactive web map I've created using CartoDB.js. I'd like to have different data layers turned on / off ...
1
vote
2answers
573 views

Openlayers 3 spyglass example (advanced functionality)

I would like to use openlayers 3 spyglass example inside my project. The problem is when I want to use selection for layer, which will be inside spyglass circle. I can't get it working, I don't know ...
0
votes
1answer
413 views

Transfer Data from Database to Leaflet POP UP

Good Day too all! I just wanna ask a little question. Ahmm how do you show data from database to leaflet pop up? Here is my code in php select command <?php $db = new ...
2
votes
1answer
103 views

OpenLayers Only draw features in a vector layer within view

I am dealing with a kml that I am importing into openlayers as a vector layer. This kml has many features so it dramatically slows down the web app. I would like to make it so only the features within ...
1
vote
1answer
97 views

Can't Get my legend on a swipe layer map

I'm having trouble getting a legend on my swipe layer map. I'm new to Javascript and took most of the code from the API reference but can't get the legend to show up for either layers. I'm Hoping ...
1
vote
1answer
85 views

How to create a infotemplate that displays automatically

I have created a postcode search that that highlights a polygon and zooms in. but I would like it to display a infoTemplate box with having to click in it. I want it to show when the function runs. ...
1
vote
1answer
164 views

Can I plot points on a map using JSON data from a Node.js API?

I am new to the arcGIS JavaScript API. I have a Node API that is providing geographical information in JSON. I have google'd for examples and searched for solutions on this web site. Can anyone ...
0
votes
0answers
203 views

Apply css styles to layers in openlayers3

define layers and styles using openlayers3 API. I need to apply css styles for layers.for that code is in below used //applying styles for wms layer var fill = new ol.style.Fill({color: 'rgba(237, ...
1
vote
0answers
36 views

Using statisticdefintion in a querytask

I have a question about using QueryTask to accomplish to jobs: Identify unique value for a county in a graphics layer via mouseover. This unique county value (from a specified field) is used to ...
1
vote
0answers
151 views

How to get bounds coords by center LatLng point, width and height in pixels and zoom?

I have to calculate bounds coordinates to query mongodb box on server side to get data before google maps is loaded. How can I get four LatLng corners by center LatLng point, window width and height ...
0
votes
1answer
123 views

OpenLayers/jQuery without CDN?

I was wondering what are the necessary files for hosting a webgis server with OpenLayers3 without using a CDN? I am testing on a localhost without internet access. It doesn't work to merely copy ...
5
votes
1answer
2k views

Layer loadstart & loadend events in OpenLayers 3

OpenLayers 2 has these layer events "loadstart & loadend." What is equivalent to them in OpenLayers 3? While a vector layer loads and is rendered, I need to show a loading icon.
0
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0answers
55 views

cannot figure out choloropleth map with kartograph.js

I am trying to make a very simple choropleth map uisng kartograph. i am able to create simple svg world map but i cannot figure out how to create a choropleth map with kartograph.js. The map falls ...
1
vote
1answer
661 views

How to get list of all markers from selected Polygon using OpenLayer MAP v2

I am able to run following features on OpenLayers Map Version 2.x Put Markers on Map Draw Polygon on Map Select Polygon on Map Now my requirement is when i select any polygon then i would like to ...
0
votes
0answers
195 views

What is the best way to escape/encode special characters for a CartoDB insert GET request?

I have a simple web app that uses CartoDB.js. I have a data entry form and use jQuery to pull data from my inputs and textareas. I then form my SQL insert statement and insert it into my CartoDB ...
1
vote
1answer
66 views

How to get spatial reference in ArcGIS Server identify response

I'm using the ArcGIS API for JavaScript to query features in a web map. After sending an identify request to my ArcGIS Server 10.2.2 Map Service (added as ArcGISDynamicMapServiceLayer, the response is ...
2
votes
2answers
1k views

How to create circular polygon in openlayers 3?

So i would really like to modify this example: http://openlayers.org/en/v3.0.0/examples/tissot.html?q=circle Problem there is that wheter i try to apply it to my map it doesen`t work, probably ...