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

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5
votes
2answers
64 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. ...
0
votes
0answers
16 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, ...
0
votes
2answers
95 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 ...
0
votes
1answer
44 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', ...
0
votes
0answers
7 views

Adding eventListeners makes my geoserver app stop working

I am trying to use OpenLayers.Control.WMSGetFeatureInfo in combination with OpenLayers.Popup.FramedCloud to retrieve info from my geoserver and show them in a popup window. This is my code: var ...
1
vote
0answers
31 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. ...
4
votes
1answer
60 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
0answers
26 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 = ...
6
votes
3answers
864 views

Help needed using REGEXP for address string parsing

Using JavaScript, my aim is to create an "intelligent" address search function with a single textbox (rather than separate textboxes for house number, street name, street type, suburb, etc). I'm ...
1
vote
1answer
64 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. ...
1
vote
0answers
65 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
34 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
vote
0answers
26 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(); ...
0
votes
1answer
155 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
vote
1answer
158 views

Jsonp call to geoserver

If I try, like this way: $.ajax({ jsonp: false, jsonpCallback: 'getJson', type: 'GET', url: ...
0
votes
2answers
38 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 ...
7
votes
3answers
2k views

Mobile offline mapping and editing of shapefiles?

I've got a client that wants to create a mobile app that can view and edit shapefiles stored locally on the device to enable it to work offline. There is a possibility of converting the shapefiles to ...
0
votes
2answers
70 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 ...
0
votes
1answer
58 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", ...
1
vote
1answer
42 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 ...
4
votes
1answer
70 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
votes
0answers
82 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 ...
0
votes
0answers
35 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
28 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
34 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 ...
1
vote
0answers
17 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 ...
2
votes
1answer
833 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 ...
1
vote
0answers
42 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
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
votes
1answer
334 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: ...
1
vote
2answers
114 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 ...
1
vote
2answers
671 views

Unable to get Mapbox leaflet-omnivore to load markers from .csv

I'm using the Mapbox.js API to build a really simple web map using a .csv file to place markers with tooltips. I'm trying to use the suggested leaflet-omnivore library to easily parse the csv and ...
5
votes
2answers
23k views

How do you get the coordinates from a click or drag event in the Google Maps API V3?

I have made a Google Version 3 Geocoder , I want to be able to pick up the coordinates of the marker when it is dragged or clicked. Below is my code: <!DOCTYPE html> <html> <head> ...
0
votes
0answers
36 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); ...
1
vote
1answer
66 views

ogr / osr for node.js / javascript

I use a python module I created that does tests for point in polygon. It uses the python osgei/ogr and osr modules. Specifically, I use the following elements of these modules: ...
0
votes
1answer
70 views

How to submit data to modify feature using applyEdits of ArcGIS API for JavaScript?

I'm new to ArcGIS API. In a form, how can you submit data to modify a feature using applyEdits? No map is involved with this. I have a form that populates the editable data with javascript. When the ...
0
votes
0answers
24 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 ...
2
votes
1answer
100 views

FME Server API - Retrieve Output file as a URL

I have a FME Server web workspace converting a file from SHP to KML, once it runs it outputs a kml file, I need to be able to take this file and drop into my web API google Map. Is there a way to ...
1
vote
0answers
126 views

Customizing map.on(“click”) while using default editor widget

My question is whether or not it is possible to use the default editor widget in my case given the needs of my application. My map consists of points displayed from four different FeatureLayers. They ...
0
votes
1answer
78 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
793 views

How to drag a feature in Open Layers 3

I'm trying to replicate something that was fairly easy in Open Layers 2 in Open Layers 3, which is: dragging an existing feature to a new location on the map. In Open Layers 2 I just added a ...
4
votes
2answers
3k views

Compute Angle of line in conventional bearing using ArcGIS API for JavaScript?

I am trying to compute angle between two lines (line segment) using ESRI (ArcGIS, JS) in conventional bearing (Eg: N29'E) I am using Add Toolbar to draw a line segment where point A is a fixed point ...
2
votes
1answer
32 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
35 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 ...
127
votes
16answers
47k views

How do various JavaScript mapping libraries compare?

I am working on a web-based mapping system and I'm trying to figure out the best/most appropriate library to use. There are a few of them about and they each have pros and cons. Even after trying a ...
1
vote
1answer
628 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 ...
0
votes
0answers
62 views

Apply css styles to layers in openlayers3

define layers and styles using openlayers3 API. i need 2 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
12 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 ...
0
votes
1answer
47 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 ...
1
vote
1answer
173 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 ...