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

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-1
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1answer
550 views

export from json file the coordinates

Hello i need help i cant export and print the coordinates , the format of json is came from a query in a database the format is ...
1
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0answers
271 views

How to add a WFS layer to an OSM base layer from GeoServer

I'm sorry if I'm repeating what has been asked several times! I'm a novice in open layers and java script , please can some one tell me where i am making a mistake , below is the code which i used ...
0
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1answer
534 views

CartoDB or Leaflet.js get coordinates of point clicked?

Using CartoDB or Leaflet.js is it possible to retrieve the coordinates of the point on the map clicked when opening an infowindow?
2
votes
1answer
8k views

How to geocode addresses from MySQL and add them like markers to the Google map?

I'm using Google Maps API and Google Geocoding for geocoding addresses. I have table named 'users' and column named 'location' in MySQL database. Column 'location' contains addresses. I need to ...
2
votes
1answer
465 views

Saving Leaflet Maps in Database

I have a webpage with a Leaflet Map, I can add markers,filter markers and so on. My question is that how can I save it? Load the Map Add some Markers on the Map (Optional) Filter the Markers on ...
10
votes
3answers
4k views

Editing PostGIS/GeoServer data via web?

I've got PostGIS installed and would like to create a web application to do some simple edits: Draw manually (over a Basemap) points, lines and polylines, using snapping points (points, end of ...
1
vote
1answer
404 views

Update mouseover information with baselayerchange on leaflet map

On leaflet map I use baselayerchange in order to change the legend box and the info popup on rollover. The legend change works perfectly but I have a problem with the infobox (name info0/info1...), I ...
1
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0answers
70 views

How to emulate OpenLayers button click in C#

I'm trying to call a click of a user using C # with the following code ( " C # : GeckoWebBrowser.Navigate ( javascript : void ( Document.getElementById ( ' idOfElement ' ) .click ( ) ) " ) ; ...
2
votes
1answer
687 views

OpenLayers 3 measure example

Here is my fiddle, which is exact copy of Openlayers 3 measure example. What am I doing wrong when my fiddle isn't working? I can't see the blue dot to start measuring my path or area (same problem ...
1
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0answers
116 views

InfoWindows in Nested Polygons (Google Maps Api 3)

I have a large polygon with thick borders inside which there are several smaller polygons something like multiple city polygons inside a state border. The problem with this is that the info-windows ...
2
votes
1answer
2k 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 ...
0
votes
1answer
129 views

different browsers referencing different css files, arcgis javascript cmv

When I open a page in chrome, and click on a feature the popup style is coming from one css file, and when I do the same thing in firefox, the popup looks completely different and is referencing a ...
0
votes
1answer
527 views

Highlight polygon on hover and click in TileMill

I have created a MapBox.js map with several layers of polygons each with hover/click interactivity to show attributes about each polygon. I want the polygons to become highlighted upon a user ...
2
votes
1answer
2k views

Leaflet - how do you get individual markers from a featurelayer?

In Leaflet, if I have a feature layer filled with markers, how do I get these markers back from the layer? I want to apply different popups to each individual marker, instead of the entire set. I ...
1
vote
1answer
392 views

Configurable Map Viewer (CMV) - Content Pane with CMV

I’m upgrading from the old viewer to the new CMV version. Is there a better way for handling a content pane in the sidebar under the new format? In the previous version I did it thru the controller, ...
1
vote
1answer
1k 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
vote
1answer
153 views

Coloring polygon based on date using TileMill/CartoDB?

How would you color a polygon/line/dot based on a date? The colors would be a pre-set list. I need the area to update its color based on the current (or given) date. I would be using tilemill or ...
2
votes
1answer
402 views

How do I plot a line on a map, or obtain the latitude and longitude coordinates of such a line, that is 120km north of the US-Canada border?

How do I plot a line on a map, or obtain the latitude and longitude coordinates of such a line, that is 120km north of the US-Canada border, including parts of the border that cross water? (I managed ...
1
vote
2answers
343 views

How to use same info window setup for more than one layer with identify, arcgis javascript api, cmv template

I am new to javascript and am playing around with customizing the CMV template https://github.com/cmv/cmv-app. I am trying to customize my info windows for my layers, and have had some luck modifying ...
5
votes
2answers
509 views

How do the equations/algorithms behind buffering tools actually work?

I've been wondering how the equations/algorithms behind buffering tools actually work?
3
votes
1answer
5k views

How to style specific polygons from a geojson with Leaflet

I have a World Countries geojson, that has country codes as "ID" (feature.id) and names as feature.properties.name I would like to color specific countries for making a "countries visited" map. ...
2
votes
2answers
2k views

Javascript library for converting MGRS to Lat/Lng

Is there a JS library that converts MGRS to LL? I have found one that converts Lat/Lng to MGRS, but nothing that converts MGRS to Lat/Lng. Someone asked this question in the past, but the answer was ...
1
vote
1answer
390 views

How to update leaflet L.imageOverlay using jquery serialize without page refresh?

I am developing an application that fetches and displays raster/image maps (png, tif), into a leaflet map. However, I didn't like the page and the map refresh upon form submission. In addition, I ...
3
votes
2answers
2k views

openlayers - export map to canvas problem

I am trying to make a export control to export the map as image file. I found this example: http://dev.openlayers.org/sandbox/camptocamp/canvas/openlayers/examples/exportMapCanvas.html so i added the ...
2
votes
0answers
322 views

Comparing mapping APIs

I am planning to write a thesis about mapping APIs and compare three of them (Google Maps API, Leaflet and OpenLayers) or four, if you consider OL2 and OL3 as different APIs. I am planning to make 3 ...
2
votes
2answers
728 views

ESRI JS API - How to get event object from Draw Toolbar onDrawEnd

I am using the Draw Toolbar in the Esri Javascript API v3.4 and connecting to the onDrawEnd event using aspect.after(drawingToolbar, "onDrawEnd", drawEndHandleFunction, true); I am using the Draw ...
1
vote
1answer
93 views

Adding multiple addresses - ArcGIS Javascript

I am trying to use ArcGIS Javascript API to add all of the service orders that are open to a map. I can get this to work with a single address, but it is not working when I try to loop through a list ...
5
votes
2answers
550 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 ...
2
votes
1answer
1k views

Is it possible to implement Geofencing in Openlayers?

We were planning to develop an application using Openlayers, which can display the incoming GPS signals as markers and create alerts , if the markers( positions) are outside a particular zone. Is ...
1
vote
2answers
2k views

How to style geojson polygon using L.mapbox.featureLayer()

I have this code: var SupIncend = L.mapbox.featureLayer().addTo(map); var ArbolesAntes = L.mapbox.featureLayer().addTo(map); var ArbolesX = L.mapbox.featureLayer().addTo(map); var ...
1
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0answers
82 views

view attributes from feature service and export to CSV or copy to clipboard

I have a Geo-Processing service that generates summary statistics of an area of interest. What I would like to know is; Simple method to display the data in my Webpage. Is Dgrid the recommended ...
1
vote
0answers
184 views

Printing from Feature Layer via ArcGIS API for JavaScript?

I am trying to print a map using a print service. I have followed the example on the ArcGIS site namely: https://developers.arcgis.com/javascript/jssamples/widget_print_esri_request.html However I ...
1
vote
1answer
36 views

Legend hangs with large featurelayers at startup

My problem is that I created an app with a lot of services that the user can use. The problem is that when I implement the legend widget and the code goes over startup(), the app becomes stuck and it ...
1
vote
0answers
201 views

Loading KML WMS Network Link through Google Earth API

I'm trying to add a KML network link with the Google Earth API using the same function that I have used for regular KMLs and KMZs. Sources suggest to create a KML with a "Ground Overlay" to connect to ...
0
votes
1answer
122 views

KML Layers suddently not appearing on embedded Google map

I have an embedded map on: http://wtc.army.mil/modules/family%20and%20caregivers/sfacMap.html I am receiving the error below in different forms related to the session id/token trailing after the ...
4
votes
1answer
476 views

Best Practice for HTML5 Geolocation with ArcGIS for Javascript API

My organization would prefer to use its own basemaps rather than those provided by ArcGIS Online due to the accuracy of information that is represented in them. The area we service is rapidly ...
3
votes
1answer
10k views

Leaflet: How do you use removeLayer?

This is driving me mad. See the Leaflet tutorial for adding a layer control to your map: L.Icon.Default.imagePath = "Scripts/images"; var mapUrl = ...
8
votes
1answer
9k views

problem adding pop-up to GeoJSON layer in Leaflet

I'm new to working with the Leaflet API and am running into trouble with creating popups for a GeoJSON layer. I've looked at the following post as a reference and am still having difficulty: binding ...
1
vote
2answers
63 views

accesing openlayers.map in index.html

I am developing an app using OpenTripPlanner. It creates an OpenLayer map in map.js. I want to access this map in index.html so I can set it's center. Kindly help me out.
1
vote
0answers
946 views

How should I make use of railway routes from Google Maps API?

I have a specific requirement wherein I have to display or highlight only railway stations in the map rather than the whole map. How can this be achieved? This is the code I tried: <html> ...
2
votes
1answer
3k views

Help with getting the coordinates of a point updated using ESRI JS API Editor

I've been working with ESRI's javascript API for about a week and finding that somethings click while other things are still a mystery to me. I've already created a simple web map that loads an ...
2
votes
0answers
99 views

split polyline at specific distance

I am working on a project that uses sql server for geometry datatype and arcgis server and asp.net website and entity framework for data access and arcgis javascript api for map viewer. I want to ...
0
votes
1answer
129 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 ...
0
votes
0answers
351 views

Layer Definition Query - Subqueries

Background: I want to track the movement of icebergs in ArcGIS. In my FileGeodatabase I have a single Iceberg layer. What I have thought of is to create an ID field for each object; each ArcGIS ...
1
vote
0answers
85 views

Node.js transformation from NAD83 to WGS84

I've used the excellent npm shapefile library to import Canadian electoral districts into MongoDB. Here's a sample file: http://ftp2.cits.rncan.gc.ca/pub/geott/electoral/2011/fed308.2011.zip Is ...
0
votes
0answers
69 views

Openlayers complex markers

I have an example that displays an image as well as a string for each marker. My designers want the string to be displayed on top of the image and I don't know how long the string can be. Also I need ...
1
vote
1answer
3k views

OpenLayers and GeoJSON - problem projecting EPSG:4326

I'm trying to project some GeoJSON data but it ends up at 0,0. I've looked at other posts and tried those solutions to no avail. Can anyone help? Here is the code: <html> <head> ...
9
votes
1answer
243 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 ...
1
vote
0answers
369 views

Create a Leaflet custom checkbox control

I want to create a custom checkbox control which will simply set a flag in jquery/javascript: if checked the flag = 'clustered' or if unchecked flag = 'unclustered'. So far I have a control on the ...
2
votes
1answer
296 views

How to use right-click to finish drawing a Polygon in OpenLayers?

I'm using OpenLayers 2.13 and the DrawFeature control. By Default, the Polygon is completed, when you double click. Some of our clients are requesting that we allow the mouse right-click, to finish ...