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

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8 views

qgis2web problem with lots of data

A few month ago I was able to make a polygon map of population: http://supermap.hostei.com Today I opened the same QGIS project and tried qgis2web again. The plugin interface had responding ...
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0answers
7 views

Openlayers 3 - click under geolocation layer

I am using geolocation feature of Openlayers 3.13, as in the examples. (http://openlayers.org/en/v3.13.0/examples/geolocation.html) However I also have queryable point layers, and when I track the ...
0
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1answer
166 views

How to filter polygons in Leaflet using range slider

I have a map I'm working on with Leaflet that displays a choropleth of zip code-level data. One piece of functionality I would like to add is to allow users to use a range slider to filter out ...
3
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1answer
170 views

Increase maximum zoom level for a WebTiledLayer in ArcGIS

I am using the WebTiledLayer from the Javascript ArcGIS API to render a custom WMTS source. The WMTS I am using has zoom levels going from 18 to 21, however I cannot zoom in further than what appears ...
1
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1answer
31 views

How to set bounds and make map bounce back if moved away?

I wanna make this map bounces to the center, and make the red line the limit that you can move the map. Don't know why my fitbounds doesn't work. Any help? My code: var mapBounds = ...
3
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2answers
2k views

Google Maps need to click twice to get marker click event to trigger

I have a google map that I am populating with real estate listings from a database. I have set it up to refresh the listings when the map is panned or zoomed. I am using the dragend & ...
1
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2answers
194 views

Unable to serve Cesium Terrain files

I am trying to generate 3d Terrain. I am serving the terrain files at localhost:8081 Here is the Cesium Code var viewer = new Cesium.Viewer('cesiumContainer', { baseLayerPicker : false, ...
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1answer
36 views

Problems with case statements in Leaflet's pointToLayer

I am trying to create a layer that has different types of business (separated by code properties in the geojson file) but when it executes the pointToLayer below I get an Uncaught TypeError: Cannot ...
1
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1answer
36 views

Click event doesn't work with with Google Maps

I'm trying to create a simple click event when I click on a list item on my page, a marker should be created on the google map in that page. But it does not happen. Is there some google maps API ...
1
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0answers
10 views

Leaflet drag scrolling on mobile

My leaflet map is between a navigation bar and a chart displayed underneath. Unfortunately after recently incorporating leaflet-1.0-beta-2 my responsive layout is not working out on mobile devices ...
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0answers
14 views

Adding additional markup to leaflet marker_

I'm trying to customize the html output for my leaflet markers. Specifically, I'm trying to assign them additional data attributes to trigger bootstrap modals based on an ID pulled from the database ...
0
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0answers
13 views

Creating a buffer radius around a point

I would like to create a buffer radius of 1km around a set of points in my WFS layer (I'm using OpenLayers 2). I've tried creating a style but it only makes the points look bigger. Below is my WFS ...
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2answers
40 views

Snap polygon to grid (lat/lon)

I'm trying to code this in Leaflet, but the key is finding the formula to do this. Give a polygon (filled in the image), how can I expand it to fit a grid (lat/lon, outer line in image) ? This is ...
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0answers
9 views

turf.intersect of a turf.polygon and a turf.linestring?

With JavaScript library "TurfJS", when I try, to use turf.intersect([some polygon],[some linestring])) I get error ReferenceError: 'coords' is undefined at ...
4
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1answer
508 views

How to create an exact tracking route from GPS data with animated icon?

Probably this is not purely GIS related question, its related to developing issues. I am just asking if there is any kind of suggestions from Gurus. I am building an tracking application where GPS ...
1
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1answer
185 views

Legend ArcGIS Javascript does not recognize Legend from ArcGIS for server 10.2.2

I have created maps in ArcGIS for desktop and published them to ArcGIS for server 10.2.2. Because of performance issues I have created a group layer of the same map with different levels of details. ...
0
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1answer
45 views

How to create a circle in openlayers 3?

I have tried to create a circle of desired range using following code but not working. Please guide me. function createBuffer(lat, lon, range) { var style = new ol.style.Style({ fill : new ...
0
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1answer
25 views

Leaflet OSM Geocoder not working

Maybe this sounds a silly question but the leaflet OSM Geocoder published here Leaflet Control Geocoder doesn't work for me. I can see the search bar but when I search something, nothing happens. The ...
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0answers
16 views

How can I strip spaces from a moustache template field in CartoDB infowindow?

I have a custom infoWindow on a cartodb.js map which uses moustache templates to populate the fields in the infoWindow. In it I have a link to tweet a correction to the map which I populate with the ...
0
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1answer
257 views

Parsing XML file with hundred polygons using OpenLayers

I'm using this script but It's not working. <script type="text/javascript"> var raster = new ol.layer.Tile({ source: new ol.source.OSM() }); var xml = new OpenLayers.Format.XML(), wkt = new ...
0
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2answers
529 views

interactive map inside a HTML5 canvas

I'm writing a map based simulation using the HTML5 canvas and javascript. the mechanics of the simulation are working well but to be application to real space is not progressing at all. I'm ...
1
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1answer
374 views

How to add custom basemaps to BasemapGallery

I would like to add my own custom basemaps to the BasemapGallery. Is there any way I can create my own BasemapGallery with only my maps? I am using the ArcGIS API for javascript. EDIT: for clarity I ...
2
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1answer
25 views

Leaflet Map not Visible

I try to make my first Leaflet webmap (I'm very new to JavaScript so please ignore the dirty & repetitive code). I want layer controls and read the Leaflet layer control example but somehow my map ...
1
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1answer
418 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. ...
3
votes
2answers
436 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 ...
0
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0answers
19 views

Tips on building GeoReferencing web app with MapBox?

So I want to build a web app using MapBox GL JS that allows users to Upload an image (preferably any kind) Position it on to a map The image is then uploaded to MapBox as a GeoTIFF and is added as a ...
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1answer
34 views

How to show/hide markers that are inside a function using js?

I have a map with a lot of markers that are pulled from this function: function showResourcesByName(name) { for (var i = 0; i < markers.resources.length; i++) { var resName = ...
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1answer
31 views

Coordinates translation issue (from EPSG:23030 to EPSG:4326)

I'm trying to figure out how to make some translations from UTM/ED50 to WGS84. The reason I need to do them is that my data source's coordinates are in EPSG:23030 format, and I need to represent them ...
0
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0answers
16 views

Why is BorderContainer and ContentPane methods are not called for map and attributeInspector elements using ArcGIS API for JS?

I'm trying to display the attribute inspector on right-side panel when a feature 'onclick' event is called, but whenever i click on a feature the attribute inspector shows-up on left-side of the ...
1
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0answers
10 views

Plotting GPS plot without uploading data

I'm not sure if this is possible or not, but I'm wondering if its possible to plot a GPS dataset without uploading the data first to CartoDB. I've been analysing some data by uploading the postcode ...
1
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2answers
59 views

Leaflet TypeError: this._northEast is undefined

I have some codes used Leaflet and I want to refactor them below one is working: jQuery(document).ready(function(){ $.post("StatisticsResultServlet", { ...
0
votes
1answer
2k views

OpenLayers 3 Zoom to extent only working in debug?

I am using gpx data to display routes with open layers 3 and my attempts of zooming to fit the gps trace have been thus far unsuccessful. I only ever got it working in debug mode on firefox, where it ...
0
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1answer
28 views

Open layers3 drag box interaction not pointing correctly

I am using open layer 3.9.0. I Want to add and remove dragZoom and dragBox interactions in openlayers3 map dynamically. <button id='box'>dragBox</button> var dragBox = new ...
3
votes
1answer
34 views

Checking if two WGS84 lines intersect in JavaScript

I am trying to work out given two GeoJSON lines (WGS84), if they intersect (i.e. cross one another). Let me give some pseudocode to illustrate: // Providing Line 1 = lon1, lat1 and Line 2 = lon2, ...
1
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0answers
11 views

OpenLayers 3 - Source with multiple available projections

Is there anyway to specify a (Tile)WMS source that supports multiple projections? For example, my WMS server supports requests for both EPSG:4326 and EPSG:3395. So if the projection is supported in ...
1
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1answer
23 views

OpenLayers 3 create bounding extent which includes two points

I'm working with openlayer3 in my ionic application and am stucked with the problem with creating a bounding extent to get a few points in the viewport. My code looks like this: var destLoc = ...
2
votes
0answers
599 views

It is possible put highcharts chart in openlayers popup?

As title. I build a openlayers map on my website. and there are many feature vector on the map. now I want to put a highcharts charts in popup. to show the temperature in every city something Like ...
-1
votes
1answer
82 views

Python or Javascript focus (for self-directed study at university) [closed]

Next semester is my last at university. I have taken all 3 of the GIS courses offered in my program. Besides some very light interaction with Python though, their has been zero discussion of ...
3
votes
1answer
494 views

how to disable duplicate items in the legend for ArcGIS JavaScript API

I have a problem with duplicate items in the legend panel! Can anyone help me? This is my feature Layer with popup info: // Feature Layer var msFeatureLayer = new ...
3
votes
1answer
36 views

How to fully Style a marker in leaflet?

Styling a marker is possible with pointToLayer I dont know how to get a marker change style for mouse over and for click etc.... var map = L.map('map', { zoom: 14, ...
1
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3answers
1k views

converting UTM - Decimal Degrees with javaScript or using a web service

I am creating a wildlife survey form that has a field where users enter location. Users will be able to enter location using a map (i.e. draggable pushpin) or by manually entering lat/lng. My clients ...
4
votes
2answers
252 views

tabbed popup window for Arcgis Javascript

Anyone know examples of a tabbed popup window for Arcgis for javascript, NOT an infowindow? If you could point me in the the right direction it would help.
0
votes
0answers
21 views

How to show a legend of a invisible layer in ArcGIS javascript?

Using the JavaScript API for ArcGIS, I'd like to show the legend of a DynamicMapServiceLayer that's not visible. Is this possible? The result would be a static legend that's always there, no matter ...
0
votes
0answers
16 views

opnenlayers 2 marker icon showing up at wrong coordinates position

the code is written using openlayers2 with bing. I want to add a marker with a custom icon. The code partially works and the marker icon shows up on the map. My only problem is it shows up in the ...
1
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0answers
25 views

How to search vector layer features in Mapbox GL JS

I need to add a search bar that will search vector layer attribute features which are hosted by mapbox. I'm using the Mapbox GL JS API. I know this can be done fairly easily with Mapbox js/Leaflet. ...
1
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0answers
14 views

Attachment editor esri duplicate files

I am using arcgis API's attachment editor var attachmentEditor = new AttachmentEditor({}, dom.byId("content")); attachmentEditor.startup(); featureLayer.on("click", function(evt) { ...
6
votes
1answer
514 views

Why do ArcGIS Desktop 10 HTML popups give JavaScript/HTML Error?

Using ArcMap 10 Desktop HTML Popups. The issue I am having is that the html < select > elements aren't working - you can select it and use the arrow keys to navigate through(up/down) the list but ...
0
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1answer
411 views

OpenLayers 3 how to keep original image extent

I'm new at ol3, I'm trying to display my GIS view by updating my ol2 code. I created the projection and I can display my static image but I'm obliged to use local extent [0, 0, 1024, 968] instead of ...
0
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0answers
14 views

Creating Interactive Web Map? [duplicate]

After a bit of help. I am looking at creating an interactive map for a website. There seem to be hundreds of different ways of approaching this. Wondering if anyones got any really good examples of a ...
0
votes
1answer
16 views

Modifying OpenLayers 2 to connect to different WMS using JavaScript?

I have a program that runs in tomcat and uses JavaScript to access a postgreSQL database as well as Google, Yahoo, Geoserver, and Open Street Map map services through OpenLayers 2.12. I would like to ...