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

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0
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2answers
343 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
2answers
374 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", ...
5
votes
1answer
424 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 ...
3
votes
2answers
508 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 ...
1
vote
1answer
995 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
2answers
299 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 ...
1
vote
0answers
117 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 ...
0
votes
0answers
327 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
129 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 ...
1
vote
1answer
557 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 ...
3
votes
1answer
490 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
311 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
1k views

Using OpenLayers 3 spyglass?

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
761 views

Transfer Data from Database to Leaflet POP UP

How do you show data from database to leaflet pop up? Here is my code in php select command <?php $db = new PDO('mysql:host=localhost;dbname=poi', 'root', ''); $sql = "SELECT ...
2
votes
1answer
161 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
221 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
201 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
307 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
460 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
61 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
402 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
243 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 ...
7
votes
4answers
5k 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.
1
vote
1answer
1k 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 ...
1
vote
1answer
109 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 ...
4
votes
2answers
4k 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 ...
5
votes
1answer
2k views

OpenLayers 3 modify end event

I want to save the geometry data after I modify it, so I need an event that fire after I finish to modify the feature. I use the following from this post: listener modify interaction var ...
3
votes
1answer
4k views

How to get the feature location in OpenLayers v3

After I am using the drawing interaction or modify interaction I have a listener that returns the feature that modified or added. Example draw.on('drawend', function (event) { // get the feature ...
2
votes
1answer
311 views

Disabling a map in Javascript API

Here is my code for my map: omap = new Map("overviewMap", { extent: initExtent, logo: false, slider: false }); tmoverview = new ArcGISDynamicMapServiceLayer(mylayer, { "opacity": 1.0, "visible": ...
1
vote
0answers
78 views

Overlap feature's style with layer style

I have a Vector layer, where each feature is created using a image with different rotations. var point = this.__getFeaturePoint(); featureStyle = { externalGraphic: this.__getImageURL(), ...
2
votes
1answer
100 views

Legend not removed when layer changed [closed]

I made this webpage with JavaScript and CartoDB. The layer selector works like I expected it to but I noticed that the legend are stacking on top of each other and not being removed when the layer is ...
1
vote
1answer
911 views

Cant get infoWindow to show in CartoDB dynamic layer

Heres my very simple code. <title>Leaflet multilayer example | CartoDB.js</title> <meta name="viewport" content="initial-scale=1.0, user-scalable=no" /> <meta ...
3
votes
1answer
205 views

Show Cartodb Maps infowindow on hover programatically

How do i get to show the cartodb infowindow when one hovers over a point? I see that it is possible via the gui but how can one do it via code? what method should i call on the on('featureOver') ...
0
votes
1answer
121 views

Adding geometry.type circle

I have to amend the following code so that on the map it's possible to draw a second circle graphic as well as a line, polygon and point. I've tried to add an else if statement much like the polygon ...
0
votes
0answers
274 views

How to send parameter to mapfile from javascript with query to show map in browser?

I try to send parameter to mapfile but it's seem it didn't work very well. Can anyone help me find solution please? Here's my mapfile webgis.map MAP NAME "Banda_Aceh" SIZE 2000 900 UNITS dd ...
0
votes
1answer
388 views

Openlayers event cluster feature id does not appear on layer vector feature id list

My application's objective is to click on a cluster and produce a popup with a list of all placemarks clustered there where every entry is a hyperlink that closes current popup and opens a new ...
1
vote
1answer
1k views

OpenLayers 3 zooming to layer when source is ImageWMS

When I create a layer using a vector source I can force the map to zoom to the layer using //stuff including setting up defaultStyle var vectorSource = new ol.source.GeoJSON({ url: geoJsonUrl, ...
3
votes
1answer
3k views

Convert Multipolygon Geojson to multiple geojson polygons?

I see a lot of questions going from Polygons to MultiPolygon, but is there some easy way to go the other way around? It would also be useful to preserve the attributes from the MultiPolygon to apply ...
-1
votes
1answer
98 views

How to create if else statement for two combo boxes?

I have an ArcGIS JS API application where I have an "origin" combo box that must be populated for request type, in the following series of combo boxes I would like for a value to be chosen based on ...
3
votes
1answer
788 views

OpenLayers Map From QGIS Server

I am creating my first map using OpenLayers and I am having trouble. The map was created with QGIS Desktop 2.6, and I am using Ubuntu 12.04. The WMS service is QGIS Service. This is my first try doing ...
3
votes
1answer
419 views

Show an ArcGIS InfoWindow on Map Init

I have created a map with a simple marker at a specified location but I cannot figure out how to have an infowindow attached to the position open automatically on page load. This is my init function: ...
3
votes
1answer
2k views

Google Streetview API overlays

Does anyone know if I can draw georeferenced polygons in the streetview api. I'm curious to know if anyone has successfully tried this. I see that custom overlays are allowed but I'm not sure if this ...
0
votes
1answer
1k views

Google Maps Api , PHP, Javascript and Postgresq-Postgis

I'm trying to make a web application, where I take the start/end city from a text box, geocode the city, use the coordinates to query my database in PHP, and return the features to be drawn in the ...
1
vote
0answers
491 views

ESRI Javascript - Print Task GP Service - Symbology Issue

I am using the ESRI js API, and using a python GP service to run a print task to PDF with custom layouts. This works great, except when i have any map service enabled in the map. The layer in the ...
1
vote
1answer
996 views

Openlayers 3 draw set name

I have following simple draw interaction: draw = new ol.interaction.Draw({ features: featureOverlay.getFeatures(), type: (type) }); Now I would like to add attributes like a name and id to ...
1
vote
0answers
43 views

My map looks wierd and “pixly” in OL3

I'm trying to present a mapserver with OL3, it doesnt work well. The documentation of the mapserver is non-existent and the GetCapabilities to the mapserver responds with a very short (not so good or ...
1
vote
1answer
67 views

Is it possible using JavaScript and cartodb.js to get the layer's total amount of visible data in a certain moment?

I am working with a torque layer and I would like to know for each moment the amount of data points shown in the visualization.
0
votes
0answers
13 views

Trying to build website which shows different satellite images? [duplicate]

Basically i want to build website which shows different satellites images of cities and as i hover my mouse the lat/long should change. Sorry for such a basic question, as i am new to javascript, if ...
9
votes
3answers
6k views

Z-index in OpenLayers 3: layer ordering in OL3

Is there a method to change Z-indexes of layers in OpenLayers3 like it was in old version? map.setLayerIndex(markers, 99); //set the marker layer to an arbitrarily high layer index I need to change ...
7
votes
1answer
9k views

OpenLayers 3 - draw multiple lines/paths based on coordinates

I am trying to draw a line(s) based on give coordinates (starting and ending point). Googled , found few examples but non of them seem to work probably because they are for OL2, so this is my last ...