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

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122 views

TitlePane not rendering - working with basemapGallery sample code 2

I'm having the exact same issue as this question: TitlePane not rendering - working with basemapGallery sample code but the solution doesn't work for me. my javascript: ...
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0answers
20 views

How to go about creating a custom tool/adding special functionality for a web app

In my soon to be developed web app, I will have an image service and also a feature service that is essentially an index to the image service, with all kinds of attributes. I would like for the user ...
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0answers
6 views

Placing Pins and following transformation on zoom map d3

So I am using this http:// bl.ocks. org/mbostock/4699541 framework on D3.js and I just figured out how to append circles to the map. However when you click on a state the circle moves out of place ...
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1answer
81 views

JS/browser API library to show/interact with many markers with the best performance?

What's the best Javascript library that can show about 50000 (and more) clickable markers without resorting to things like clustering markers,etc? The markers are clickable and I want to associate ...
1
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2answers
995 views

How to project pixel coordinates in leaflet?

I am trying to create a map based on an image which is 16384x16384 px, but I would also like to add markers at specific locations using pixel coordinates of this given image. I created a tile layer, ...
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3answers
854 views

ESRI proxy page not working properly + CORS + cross domain scripting

I have set up a proxy page. I am using jsp version of proxy page. I have set up a server URL which will point to my Java. When I load the my page which the proxy URL has set in its html it will work ...
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1answer
2k 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 ...
0
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1answer
694 views

OpenLayers create marker (feature with icon) from WKT

I have a point object WKT. Like this: POINT (25.04568 48.221548). Also I have an icon in my project folder. My goal is to show on a map an icon that represents a feature. Can it be just a normal ...
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1answer
207 views

Leaflet setView with non lat/long CRS

Is it possible to use setView when using an alternative CRS? var map = L.map('map',{crs: L.CRS.EPSG26915}).setView([4970081,477018], 13); // Returns: Uncaught TypeError: Cannot call method ...
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0answers
13 views

How to use different popup styles in the same leaflet web map for different dynamic map layers

I am very new to javascript, CSS and HTML. I have been playing around with leaflet and have been trying to figure out a way to customize popups for different features in my map. Is there a way to do ...
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0answers
26 views

How do I use Proj4Leaflet projections correctly?

I'm loading data layers from a WMS server into a Leaflet map, and I need to give the user a choice of projections. For the WMS server requests, I just need to change the CRS parameter to a different ...
2
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2answers
187 views

How can I convert esriMeters to Lat/Lng?

I am pulling a JSON list of features into a web page. The points come as esriMeters and the rest of my app uses Lat/Lng. How can I do this conversion in the browser (javascript)?
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1answer
89 views

How to create styled markers with custom marker tooltip

How to create custom markers and when mouseover on marker i need a tooltip can any one suggest me how to do these type of markers...i need markers like below image Thanks in advance
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1answer
41 views

Openlayer3 basemap appears white block in Chrome

i faced interesting an issue on Chrome. im using google's 4 number base layer (street, hybrit, etc.) When my tiles are loading over baselayer, baseLayer becomes white block. Why? No any issues on ...
0
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1answer
85 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 ...
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0answers
273 views

Leaflet and Geoserver WFS [closed]

I have problem with Leaflet...i tried to connect Leaflet with Geoserver WFS, but in console i have this error: SyntaxError: missing ; before statement ...
2
votes
1answer
380 views

Search Functionality using Cartodb API

I posted a similar question about this a month or so ago and I was still in early stages of researching the problem thus not to many results came from it .After some time and effort I have come close ...
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0answers
19 views

Add text to PictureMarkerSymbol in arcgis using javascript

I am new to ArcGis, i need complete code of how to add dynamic text on the marker symbol. I have Location Data in Json format: {locations: [{latitude: 52.1, longitude: 4.1, ...
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1answer
2k views

Add label/text to esri.symbol.PictureMarkerSymbol

How can I add label or text on the ESRI's PictureMarkerSymbol (Javascript API)? I could use any other marker as well that support labels. Thanks!!
0
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1answer
25 views

How to reduce the opacity of a Google Maps layer in CartoDB.js

I have a CartoDB.js-App where I load my vis using cartodb.createVis (I do not manually define Leaflet layers). How can I reduce the opacity of the Google Maps base layer? I tried the following, as ...
2
votes
1answer
246 views

How to write addressToLocations onError?

How can I write a code for checking the error condition in Javascript (ArcGIS) for addressToLocations(params, callback?, errback?). if somebody entered an invalid address- how can I call error ...
0
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1answer
137 views

register to event in openlayers 3

I have a web application in openlayers and I am starting to rewrite it to openlayers 3. In the application i have some features that i need to delete/move/add/edit the features then to save it to the ...
7
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3answers
8k views

Draw a point with ArcGIS Javascript API

I am currently trying to draw a point with the ArcGIS Javascript API. Pretty much like this example, http://help.arcgis.com/en/webapi/javascript/arcgis/demos/toolbar/toolbar_draw.html, except the ...
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2answers
573 views

OpenLayers vector does not draw (or re-draw) on zoom level change or layerswitcher off/on

Here is the full code (i'll highlight the important parts after): jQuery(document).ready(function($) { // ...
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0answers
16 views

FindTask doesn't work with rest of JavaScript code

I need to add a FindTask to the following code that returns the attributes of the searched in a data grid and selects the data on the map. By modifying the "show find task results in a datagrid" ...
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0answers
19 views

JavaScript: FindTask works but no data appears on map

I need to add a FindTask to the following code that returns the attributes of the searched in a data grid and selects the data on the map. By modifying the "show find task results in a datagrid" ...
2
votes
1answer
22 views

Make Leaflet Map Background Transparent

How can i make the background of the leaflet map transparent. I see opacity controls from the layers, but not the map background. Should the be changed just with plain CSS? Thanks
0
votes
1answer
21 views

Draw arc in Geo map WGS84 coordinate system

im trying to draw an arc in OpenLayers, in non Geo map it works well and here is my code: function calculateArcPointsNonGeo(center, radius,startAngle,endAngle,segments) { var pointList = ...
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1answer
384 views

Export KML from points plotted in javascript Google Maps API?

I want to export a KML file from points plotted in Javascript using the Google Maps API. Is there a way to do this? The user logs in and checks Google Maps, then plot points on the map and finally ...
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0answers
29 views

Showing only some points in Feature Layer on ArcGIS.Com WebMap Javascript API

I am looking at creating a webmap which will allow users to place a point either by clicking on a map or selecting a point from a drop down which will then buffer the point. I've done something ...
3
votes
1answer
211 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 ...
0
votes
0answers
38 views

ArcGIS Circle Buffer

I am stuck, trying to draw a simple circle buffer using ArcGIS. Here is how I set up my base map: dojo.require("esri.map"); dojo.require("esri.tasks.servicearea"); dojo.require("dijit.dijit"); ...
0
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1answer
206 views

ArcGIS map service layer not loading properly

I'm at a total loss. My initial problem was an issue with the layer not loading at all when the page was set to the full extent, despite having changed the Min/Max Scale settings generously when ...
9
votes
1answer
158 views

Mercator bias plot in Leaflet

I was inspired by this wikipedia image from the mercator projections page to hack around with leaflet. The idea was to interactively have your cursor move a continent and that it would be corrected ...
0
votes
2answers
185 views

javascript function to search all OpenLayers vector features covering a pixel

I have an OpenLayers map that draws features in a vector layer. The features are selectable and have a popup on select. Unfortunately in a lot of cases the features overlap so it can be impossible to ...
9
votes
2answers
1k views

Restrict pan and zoom in ArcGIS Javascript API?

I'm creating a web map of a university campus. I have the map functioning, but I don't want to be able to pan off of the basemap, into whitespace. Do you know of a function that will auto-pan the ...
0
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1answer
93 views

Mouse click event used gis application with much data

I will create an application that using my water pipes, electric cables, gas pipes service in a city. All of streets and roads including water pipes. My service is publishing pipes. My service like ...
2
votes
1answer
41 views

How to apply weight to Google heatmap?

I am trying to plot a Google heatmap based on the JSON objects returned. Here is my JavaScript: function getHeatMap() { heatLayer = new HeatmapLayer({ config: { "useLocalMaximum": true, ...
2
votes
1answer
140 views

How to get data from TileMill tileLayer properties in Mapbox for click/hover

I've successfully used Leaflet to load a geoJSON polygon-shapefile with data, and added click and hover interactivity to the layer. For a large dataset, I switched to mapbox.js 1.6.1, used TileMill to ...
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0answers
22 views

Point Cluster Layer not defined

I am trying to do a point cluster layer based on the JSON objects I obtained from database. Here is my JavaScript to plot a point cluster layer: function addClusters() { $.ajax({ url: ...
4
votes
3answers
271 views

How can I find closest point on a polygon from a point

I have a point that may be inside or outside of a polygon, I need to find the nearest point on the polygon boundary from the point. Point(x,y) may be inside or outside of the polygon, shortest ...
3
votes
1answer
2k views

CloudMade Routing with Leaflet: route is not displayed

I am trying to consume the CloudMade routing API using Leaflet. So far, I have managed to pass points and receive a response, and parse that response into an array of points. The array of points is ...
4
votes
1answer
156 views

Editing PostGIS topology in a web browser

I am trying to conceptualize the best process for editing topology from PostGIS in a web browser. Ideally what I would like to accomplish is the loading of a topology (imagine the lower 48 states of ...
0
votes
0answers
13 views

How can i find shortest point on edge of a polygon from a point to that polygon (not it's distance ) [duplicate]

Point(x,y) may be inside or outside of the polygon ,shortest distance between polygon ABCDE and point(x,y) is marked as red line ,the intersecting point is Point(m,n) .I need the value of m and n I ...
0
votes
1answer
61 views

Using Google Map Spatial Reference to plot HeatMap?

Basically I am trying to plot a Google heatmap based on the JSON objects returned. Here is my JavaScript: function getHeatMap() { var gradient = [ 'rgba(185, 185, 203, 0)', ...
1
vote
3answers
157 views

Popups over markers not working in OpenLayers

I have a map developed based on google map API and OpenLayers. It has some markers on it. I'm trying to create a popup for each marker. The markers are in a markers layers. Besides the markers layer, ...
0
votes
1answer
181 views

CartoDB.js - Accessing table fields in hover function

I am new to CartoDB.js and javascript in general, and I am attempting to highlight polygons in response to a mouse hover. My plan of attack attempts to utilize one of the interesting templates ...
1
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0answers
44 views

How to simulate events from Openlayers 2?

I am working on a GIS API that uses OpenLayers. I am testing it using QUnit. The problem is I need to simulate clicks and trigger some events to be able to test the whole code. For example, I have a ...
5
votes
3answers
143 views

Guidance when to style your features in Tilemill vs. Leaflet?

I've found this generally to be dependent on each project's goals (or what the client wants), but when you have the options, what any rules of thumb or guidelines do use you in a project to determine ...
0
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1answer
222 views

set infoTemplate for various graphics in graphics layer in loop

I am successful at getting an info window pop up on the event click of a marker on a map. Now, what I'm having trouble with is passing unique information for each graphic in the loop to the individual ...