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Google Maps and ASP.NET

Building a custom server control

I am sure that most of you have heard about or have had a chance to use Google Maps. It's a great service and I was really impressed by the responsiveness of the application and the ease with which users could drag and zoom maps from a Web browser. It has in many ways heralded the arrival of AJAX (Asynchronous JavaScript and XML), which I am sure will revitalize Web development in the days to come.

What makes the service even better is the availability of the Google Maps API (Application Programming Interface) as a free Beta service. The API allows developers to embed Google Maps in their custom applications. It also allows them to overlay information on the map and customize the map to their needs. As I write this article there are quite a few sites that utilize Google Maps, and more and more of them are appearing by the day.

The API by itself is pretty straightforward and easy to use; however, it requires the developer to have a good command of JavaScript because it extensively relies on client-side Java scripting. In this article we will be looking at building a custom ASP.NET server control that would allow a .NET developer to harness the power of Google Maps in the code-behind model. We will see how to accomplish most of the functionality exposed by Google Maps using this control, and we'll also see how to data bind the control, thereby allowing developers to easily build data-driven custom ASP.NET Web applications. The control would eliminate the need for the developer to write any JavaScript to accomplish most of the Google Map functionality.

Some Google Maps Basics
Before we get into the details of the ASP.NET control, let's look at the basics of the Google Maps API. A detailed description of the API can be found at www.google.com/apis/maps/documentation/. The first step before using Google Maps is to register for a key with Google (www.google.com/apis/maps/signup.html). This is absolutely free and hardly takes a few minutes. Each Web site that uses Google Maps has to have its own key. Make sure that you go through Google's Terms of Use (www.google.com/apis/maps/terms.html) before you start using Google Maps in your application.

Google represents an instance of the map as a "GMap" object. It is rendered as a div tag on the page. Once you have the map, it is possible to add controls to the map. Some of the available controls are the GMapType control that helps to toggle between the different views, namely map view, satellite view, and finally, the hybrid view that is a combination of map and satellite views. The other controls that are usually seen on the map are the ones used to add scrolling and zooming capability to the map. At the time of writing of this article, there are three different controls available:

  • GLargeMapControl: A large control for scrolling and zooming
  • GSmallMapControl: Similar to the previous one, but eliminates the zoom scale bar
  • GSmallZoomControl: Includes only Zooming controls

Once the map has been set up, it is possible to overlay information on the map. The information can be in the form of points or lines, though points are the most common ones. In order to overlay a point on the Google Map, it's necessary to know its longitude and latitude. At this time, Google does not provide any geo-coding services that give the co-ordinates corresponding to an address, but there are a couple of free services available on the internet that do so. www.Geocoder.us is one of them and given a US address, it returns the longitude and latitude for the same. Once the longitude and latitude have been obtained, create an instance of a GPoint (which is Google's representation of a point on the map), then create a GMarker using this point and add the marker to the instance of the Google Map. In order to Center and Zoom on a point, the GMap Object exposes a method ZoomandCenter that takes the point and the level of zoom required as the parameter. Just like points, it is possible to overlay lines on the Map. Those of you who have used Google Maps for directions will be familiar with the lines used to depict the route. In order to add a line to the Google Map, we need to create an instance of a GPolyLine object and pass in an array of GPoints to plot it. It is also possible to assign color, width, and opacity to the line. Another useful feature in Google Maps is the ability to show a pop-up window when the user clicks on a Marker. Google Calls this pop-up window by the name "InfoWindow."

The Google Maps ASP.NET Control (GMAP Control)
The main aim of this control is to allow .NET developers to utilize the functionality of Google maps as a server-side control by writing little to almost no JavaScript at all. It is more of a .NET wrapper around the Google API; however, because it is a full-fledged ASP.NET server-side control, it is possible to bind data to the control, thereby increasing the usability of Google Maps. In the following sections we will see how to use this control to implement most of the common functionality of Google Maps. Before we do so, let's take a look at the control. The principal class of the control is the "GMapControl" class. This class in turn references the following classes (most of these classes are the .NET equivalents of the classes used by Google):

  • GPoint: This is the class representation of a geographical point and exposes latitude and longitude as its two properties.
  • GPoints: This class represents a collection of GPoint objects.
  • GIcon: Represents a custom icon that is used as an overlay on the map. The GIcon class exposes the following properties: the Image URL, which as the name suggests, is the URL of the image used to represent the icon; ShadowImageURL is the URL of the shadow associated with the icon; IconSize and ShadowSize represent the size of the icon and the shadow, and the last two properties are IconAnchor and InfoWindowAnchor, which specify the point where the icon should be anchored to the map relative to its top-left corner and the point where the Info window should be anchored to the map.
  • GLine: This is a line that the user wishes to overlay on the map. By default it takes a collection of points (GPoints) as an argument in its constructor. It is also possible to set the color of the line as well as its weight and opacity through an overloaded constructor.
  • GMarker: This is the .NET representation of the Google Maps class GMarker. The default constructor accepts an instance of a GPoint class. It also has an overloaded constructor that takes a GIcon along with the GPoint in case the developer wishes to use a custom icon to represent the marker.
  • GSize: Represents a two-dimensional size measurement.
  • JScriptGenerator: This is an internal class and has more of a helper function. It generates most of the JavaScript functions that are needed by the control.
  • HelperColorConvertor: This class is used to convert a color into its equivalent Hex value. This class is marked as internal.
  • HelperDataResolver: This is an internal class that helps in data binding and has just one method. The method casts a datasource object into an object that implements the IEnumerable interface. The help file that describes in detail the different methods and properties of the classes involved is available as a download.

Getting Started in ASP.NET
Before we use the ASP.NET control in our application, there are a few things that need to be taken care of to ensure that it works as desired.

Web.config File
The GMAP control renders itself as a DIV tag, however for non-Internet Explorer Browsers, ASP.NET renders the div tag as tables. If you want the page to render the GMAP control properly in other browsers such as Netscape and Firefox, include the browser cap section shown in Listing 1 into the Web.config file of your application.

Page Configuration
Google has certain recommendations for the HTML standards on pages that contain the map to make sure that the layout is predictable across different browsers. A detailed description of the same can be found in the Google maps documentation. It is imperative that you follow these standards, especially if you plan to overlay lines on your map. For lines to be rendered on the map, you need to include the VML namespace in the HTML page for Internet Explorer browsers. Make sure that you don't forget to do this, because otherwise the lines will not be displayed in Internet Explorer. The HTML tag of your page should at the minimum look like the snippet below:

<HTML xmlns:v="urn:schemas-microsoft-com:vml">

Adding to the Toolbar
This step is optional; however if you are using Visual Studio .NET as your IDE, I would recommend that you go ahead and add the GMap control to your toolbox. The advantage of doing so is that you can easily drag and drop the GMap control onto an ASPX page like any other ASP.NET control, and Visual Studio will automatically register the control on your page. Figure 1 shows the GMap control on the toolbar.

Creating a Basic Map Using the Control
Since we are done with the setup, let's go ahead and create a simple example using the control. We will add the GMap control to the page, set its dimensions, and make it center and zoom at a particular point. For the sample application used in this article, I have saved the map key in the Web.config file and will be setting the GoogleMapKey property of the control from the config file. I will be setting the map type of the control to be that that of "Map." In case no map type is specified, the control defaults to the preset "Map." The GMap Control also supports satellite and hybrid map types. Make sure that you center and zoom at a point, otherwise all that will show up will be a grey area. Listing 2 shows the code for this example and Figure 2 shows the output.

Setting the GMap Control Properties
Let's go ahead and set some properties to the basic example we just created. The GMap control exposes a set of properties that allows the developer to customize the control to his or her needs. If we wish to give the user the flexibility to change the view, we set the ShowMapTypeControl property of the control to true. By default, the user is able to drag the map, however, if we do not wish the user to drag the map around, we can set the EnableDragging property to false. To allow the user to be able to scroll or zoom, set the ScrollControlType property of the control. There are three different options: "large," "small," and "zoom only," to correspond to the controls offered by Google. Listing 3 shows the source code and Figure 3 shows the output in the browser.

More Stories By Jeevan Murkoth

Jeevan Murkoth is a Microsoft Certified Solutions Developer (MCSD) in .NET (Early Achiever) and a Microsoft Certified Application Developer (MCAD) in .NET. He currently consults for Tennessee Valley Authority and lives in Chattanooga, TN. He has an MS in Management Information Systems from Texas Tech University.

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Most Recent Comments
stuartlodge 01/08/09 08:00:49 PM EST

Is anyone else developing this control forwards? Can I update the control and republish it? (with credits obviously).

e.g. I've just spent a couple of hours updating bits to GMap2 so as to use GLatLngBounds - http://slodge.blogspot.com/2009/01/adding-bounding-box-to-google-maps-in...

punkbd 12/15/08 10:45:53 AM EST

Where is the control? Very unfriendly site. On 'Your Feedback' what's the point of have 'read more & respond' link if it does nothing. Really stupid.

stuartlodge 12/09/08 04:41:47 AM EST

Zachary - if you click on any of the code sample page links then there are additional download options at the top of the code sample pages - the sample code download includes the control.

One word of warning - the zip file contains lots of Apple Mac (Vista unfriendly) thumbnail files.

stuartlodge 12/09/08 04:39:57 AM EST

Thanks for this excellent article and control.

I've put the code for a fixed JScriptGenerator.cs on my blog at http://slodge.blogspot.com/2008/12/jscriptgeneratorcs-with-fixes-for.html - this fixes the addOverlays problems and the GMAP_TYPE problems.

zwheeler 12/08/08 04:55:25 PM EST

where is the gmap control.so i can download it

erom 11/19/08 05:40:46 AM EST

I downloaded and tried to run the SampleSolution through Visual Studio. Every time that I am running the pages (.aspx) which exist in the SampleSolution I am getting the same errror 'G_MAP_TYPE' is undefined. Can someone suggest a possible solution?

sahil_mohali 10/15/08 07:13:12 AM EDT

asdsdfv fdfd

sahil_mohali 10/14/08 11:19:55 AM EDT

How to use onmouseover on marker with c# code, by default when u click on marker then info window open, i want this with onmouseover?????????

sahil_mohali 10/14/08 07:57:47 AM EDT

help

sahil_mohali 10/14/08 05:26:08 AM EDT

any one please help regarding this?

sahil_mohali 10/13/08 02:57:44 PM EDT

How to use onmouseover on marker with c# code, by default when u click on marker then info window open, i want this with onmouseover?????????

webpossible 09/27/08 04:34:04 PM EDT

ah just found the source, you need to click on list 1 from the main article and then click on the first link in this page. easy when you know where to look.

webpossible 09/27/08 03:03:20 PM EDT

where can I download this marvelous Google Maps ASP.NET Control (GMAP Control) from ? I cant seem to find a link for this anywhere. Thanks for your help and for writing this excellent article.

Noble 07/25/08 01:45:27 AM EDT

I got the same java script error in JScriptGenerator.cs
after replacing
sOverLayFunction.Append("try{this.overlays.push(a[i]); \n");

with
sOverLayFunction.Append("try{this.addOverlay(a[i]); \n");

Can You Please put your full JScriptGenerator.cs

Sajid Mushtaq 04/09/08 07:42:55 AM EDT

i cant find a link to download the source code and the control. Please help.

Regards,
Sajid

Shabdar 03/25/08 11:53:05 AM EDT

I have created similar control. It works with latest versions of Google Maps API. Here is the link,

http://www.shabdar.org/google-maps-user-control-for-ASP-Net-part1.html

Ghata 03/24/08 10:51:31 AM EDT

This one works with GMAP2

http://www.shabdar.org/google-maps-user-control-for-ASP-Net-part1.html

Balvinder 01/10/08 12:44:05 AM EST

I have downloaded GMap control and sample applications.
But OverlayMarker and OverlayLine does not work.

Following code does not works. Please, tellme what is going wrong ? Suggest any modifications in code.

GMapControl1.Width=400;
GMapControl1.Height=400;
GMapControl1.MapType=MapControl.GMapType.MAP;
GMapControl1.ScrollControlType=MapControl.GMapScrollControl.LARGE ;
GMapControl1.ShowMapTypeControl=true;
GMapControl1.GoogleMapKey=ConfigurationSettings.AppSettings["DevKey"];
GPoint myPoint= new GPoint(36.1645,-86.7811);
GPoint myPoint2= new GPoint(36.224264,-85.928273);
string sFormattedHtml="Nashville<img src=D:\\MapPoint\\SourceCode_Murkoth0401\\SourceCode\\SampleSolution\\images\\image.gif /><a href= >Visit Nashville ";
// string sFormattedHtml = "hello";
GMarker myMarker= new GMarker(myPoint);
GMarker myMarker2= new GMarker(myPoint2);
GMapControl1.OverlayMarker(myMarker,sFormattedHtml);
GMapControl1.OverlayMarker(myMarker2, sFormattedHtml);
GMapControl1.CenterAndZoom(myPoint,9);

Sai 12/14/07 05:24:08 AM EST

There is a change in google api and this shows a javascript error. So please remove "this.reOrderOverlays();" from GenerateNewOverLayFunction() in JScriptGenerator.cs file. You may find more info on this at http://groups.google.com/group/Google-Maps-API/browse_thread/thread/96fe...

baybay 12/03/07 10:25:36 PM EST

This article is horrible. Very generic. Don't waste your time.

fabrice 11/19/07 05:27:23 AM EST

How do you deal with events ?
like moveend or dragend ?
Cheers

Derek 11/18/07 10:18:07 PM EST

Here's the fix for the marker issue that everyone seems to still be having a problem with.

In JScriptGenerator.cs replace
sOverLayFunction.Append("try{this.overlays.push(a[i]); \n");

with
sOverLayFunction.Append("try{this.addOverlay(a[i]); \n");

the overlays.push is what looks to be causing the problem. After making this fix, I can lay markers on the map.

Cheers

Josh 10/01/07 11:54:26 AM EDT

Patrick -

Here is good easy to use control with full functionality. I did have a problem in deployment with the key, so I would recommend testing it on your server before you do a lot of development.

Patrick 09/30/07 02:49:43 PM EDT

Hi Jeevan,
What an excellent tutorial and powerful tool. I spent many hours trying to find where the fix for the markers and line overlays might be, but (like everyone who has filled out 4 pages of feedback pleading for help with this) I was unable. I am not so great with Javascript, but read the rest of your code with great interest. I have looked far and wide for a similar tool, and although several exist they either use a newer version of .net from me or have some such other problem. Yours works beautifully except for the known issues.
What are we, the less than Code Grand Wizards, to do in order to convince Jeevan to rework the tool.
Could we put a PayPal donation box on the site and bribe you to do it?
Could we set the code up as a project on sourceforge.net and try to rework it that way?
Could you give us a slightly more specific hint about where the problem may lie in the code?
Could I name my next child Jeevan Murkoth, even if it is a girl?
If you might patch it in the next few months, could you let us know so that we don't abandon hope.

Jeevan 08/27/07 05:04:32 PM EDT

Hi Josh,
The control when written in 2005 was made to work with Google maps Beta 1. The current version is version 2. I assume that google has made some changes to the way markers are being displayed, hence some of you are having issues in getting them to display. I haven't had a chance to update the control for the new version.Since the source code is available, I'd encourage you to take a look at it.

Thanks

Josh 08/27/07 04:34:59 PM EDT

Great, but I kind of need to display markers. Its actually the key part of displaying the map. After playing around with this a while, markers or custom markers will not display. Several others had the same problem. Any ideas, or just skirting the issue?

Eric 08/13/07 01:31:52 PM EDT

Where do I go to download the GMap Control. I was lost trying to follow the step.

san 08/02/07 08:20:00 AM EDT

I have downloaded GMap control and sample applications.
But OverlayMarker and OverlayLine does not work.

Following code does not works. Please, tellme what is going wrong ? Suggest any modifications in code.

GMapControl1.Width=400;
GMapControl1.Height=400;
GMapControl1.MapType=MapControl.GMapType.MAP;
GMapControl1.ScrollControlType=MapControl.GMapScrollControl.LARGE ;
GMapControl1.ShowMapTypeControl=true;
GMapControl1.GoogleMapKey=ConfigurationSettings.AppSettings["DevKey"];
GPoint myPoint= new GPoint(36.1645,-86.7811);
GPoint myPoint2= new GPoint(36.224264,-85.928273);
string sFormattedHtml="Nashville<img src=D:\\MapPoint\\SourceCode_Murkoth0401\\SourceCode\\SampleSolution\\images\\image.gif /><a href= >Visit Nashville ";
// string sFormattedHtml = "hello";
GMarker myMarker= new GMarker(myPoint);
GMarker myMarker2= new GMarker(myPoint2);
GMapControl1.OverlayMarker(myMarker,sFormattedHtml);
GMapControl1.OverlayMarker(myMarker2, sFormattedHtml);
GMapControl1.CenterAndZoom(myPoint,9);

Priya 07/19/07 01:02:11 PM EDT

I am getting an error in reOrderOverlays(). It says object dosen't support this property. I am getting a java script error. Is there a fix for this? Please let me know.

Rhys 07/10/07 04:31:10 AM EDT

This looks awfully plaguerised from an article at another site...
http://www.codeproject.com/aspnet/LatLaysFlat-Part1.asp

Naughty, naughty, very naughty!

Troy Johnson 06/08/07 10:52:38 AM EDT

Anyone know if this is or will soon be updated to use GMap2?

Niketa 06/05/07 11:32:18 PM EDT

this code is working fine but i am not able to draw lines and could not use marker. please help me in this. i had to commen reOrderOverlays() funstion call as my code was not working . please suggest me how can i resolve this. Thanks a lot.

Ridhi 06/05/07 11:24:10 PM EDT

Thanks Jeevan , but i am not able to see marker and polylines or lines using this tool , please help me in this . i have tried simple code . i had to comment reOrderOverlays() to make this tool working. Please suggest the way to resolve it or problem.

Tom 04/23/07 06:57:02 PM EDT

Thanks for this tool Jeevan, unfortunately I can't seem to get any markers to display (have tried the sample code as well as different browsers). No errors, just no markers! I noticed some others had this issue. Do you have any idea what may be causing this as I'd love to be able to use it properly!
Many thanks
Tom.

Gordon Hooton 03/29/07 11:01:25 PM EDT

Excellent article, is thee any way to extend the properties of the MapControl to return the current latitude, longtitude of the displayed map centre and the zoom level ?

I know these are available in Google Maps Javascript.

Mohsen Pourett 02/16/07 01:14:13 PM EST

I have downloaded the code and sample project. I have converted the code to vb.net and have been able to display the basic map properly (MapControl.dll is dated (10/9/2005). However, I have not yet to succeed in getting markers and info popups to show. The version downladed also does not have any databinding methods or attributes! any suggestions /help will be appreciated. Unfortunately, I can not provide a URL to the project since it is on Intranet servers. The code for the page with difficulty is as follows:

1. codeBehind:

Imports System
Imports System.Collections
Imports System.ComponentModel
Imports System.Data
Imports System.Drawing
Imports System.Web
Imports System.Web.SessionState
Imports System.Web.UI
Imports System.Web.UI.WebControls
Imports System.Web.UI.HtmlControls
Imports MapControl
Imports System.Configuration

Public Class BasicMap
Inherits System.Web.UI.Page

#Region " Web Form Designer Generated Code "

'This call is required by the Web Form Designer.
Private Sub InitializeComponent()

End Sub
Protected WithEvents GMapControl1 As MapControl.GMapControl

'NOTE: The following placeholder declaration is required by the Web Form Designer.
'Do not delete or move it.
Private designerPlaceholderDeclaration As System.Object

Private Sub Page_Init(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Init
'CODEGEN: This method call is required by the Web Form Designer
'Do not modify it using the code editor.
InitializeComponent()
End Sub

#End Region

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
'Put user code to initialize the page here
Dim wP As Unit
Dim myPoint As New GPoint(36.1645, -86.7811)
Dim myPoint2 As New GPoint(36.224264, -85.928273)
Dim sFormattedHtml As String = "NashvilleVisit Nashville "
Dim myMarker As New GMarker(myPoint)
''Creating our custom icon
Dim myIcon As New GIcon
With myIcon
.ImageURL = "http://labs.google.com/ridefinder/images/mm_20_blue.png"
.ShadowImageURL = "http://labs.google.com/ridefinder/images/mm_20_shadow.png"
.ShadowSize = New GSize(22, 20)
.IconSize = New GSize(12, 20)
.IconAnchor = New GPoint(6, 20)
.InfoWindowAnchor = New GPoint(5, 1)
End With
Dim myMarker2 As New GMarker(myPoint2)
myMarker.Icon = myIcon
myMarker2.Icon = myIcon
myMarker2.Icon.ImageURL = "http://labs.google.com/ridefinder/images/mm_20_green.png"
With GMapControl1
.Width = wP.Pixel(700)
.Height = wP.Pixel(700)
.MapType = MapControl.GMapType.MAP
.ScrollControlType = MapControl.GMapScrollControl.LARGE
.ShowMapTypeControl = True
.GoogleMapKey = ConfigurationSettings.AppSettings("DevKey")
.OverlayMarker(myMarker, sFormattedHtml)
.OverlayMarker(myMarker2)
.CenterAndZoom(myPoint, 9)
.ToolTip = "Where is my marker?"
End With
End Sub

End Class

2- html:

<%@ Register TagPrefix="cc1" Namespace="MapControl" Assembly="MapControl" %>
<%@ Page Language="vb" AutoEventWireup="false" Codebehind="BasicMap.aspx.vb" Inherits="HRIS.BasicMap"%>

BasicMap

v\:* {BEHAVIOR: url(#default#VML)}

3- Page error:

Line: 32
Char: 3
Error: Object doesn't support this property or method
Code: 0

Jimi Schacht 02/08/07 04:10:01 PM EST

Awsome! At last a .Net wrapper for the API that actually works!...

...But, for some reason i cannot get markers or lines to display. I use your example code and can't get the to show up with or without messing with the code. Is issue?

Jimi Schacht 02/08/07 04:08:54 PM EST

Awsome! At last a .Net wrapper for the API that actually works!...

...But, for some reason i cannot get markers or lines to display. I use your example code and can't get the to show up with or without messing with the code. Is issue?

Joginder 11/05/06 01:46:25 PM EST

Hi,

I am very much interested in the source code that shows how to handle click events on the map using Jeevan's control. If the project is in ASP.NET developed using VB.NET would be even better.

Regards,
joginder

Jay Scott 09/19/06 08:14:30 AM EDT

Thank you Jeevan.
I found the link on the blog page after posting. The component you created is excellent. The UI is easy and the code itself is well documented.

Is there a way of outlining an entire area? For instance a map of the US would have each of the states outlined, clicking on one would zoom in and show different points within the state.

Jeevan 09/19/06 07:44:26 AM EDT

Hi Jay ,
If you see below , I have posted the link to the code It is also available in my feedback dated aug 1st
http://res.sys-con.com/story/jan06/171162/source.html

Jay Scott 09/18/06 10:52:35 AM EDT

Your article is great. What I could not find was a way to download the control.

SYS-CON Belgium News Desk 09/14/06 03:36:38 PM EDT

I am sure that most of you have heard about or have had a chance to use Google Maps. It's a great service and I was really impressed by the responsiveness of the application and the ease with which users could drag and zoom maps from a Web browser. It has in many ways heralded the arrival of AJAX (Asynchronous JavaScript and XML), which I am sure will revitalize Web development in the days to come.

SYS-CON Brazil News Desk 09/14/06 03:12:23 PM EDT

I am sure that most of you have heard about or have had a chance to use Google Maps. It's a great service and I was really impressed by the responsiveness of the application and the ease with which users could drag and zoom maps from a Web browser. It has in many ways heralded the arrival of AJAX (Asynchronous JavaScript and XML), which I am sure will revitalize Web development in the days to come.

SYS-CON Australia News Desk 09/14/06 01:53:52 PM EDT

I am sure that most of you have heard about or have had a chance to use Google Maps. It's a great service and I was really impressed by the responsiveness of the application and the ease with which users could drag and zoom maps from a Web browser. It has in many ways heralded the arrival of AJAX (Asynchronous JavaScript and XML), which I am sure will revitalize Web development in the days to come.

Enterprise Open Source News Desk 09/14/06 01:09:42 PM EDT

I am sure that most of you have heard about or have had a chance to use Google Maps. It's a great service and I was really impressed by the responsiveness of the application and the ease with which users could drag and zoom maps from a Web browser. It has in many ways heralded the arrival of AJAX (Asynchronous JavaScript and XML), which I am sure will revitalize Web development in the days to come.

SYS-CON Brazil News Desk 09/13/06 05:30:17 PM EDT

I am sure that most of you have heard about or have had a chance to use Google Maps. It's a great service and I was really impressed by the responsiveness of the application and the ease with which users could drag and zoom maps from a Web browser. It has in many ways heralded the arrival of AJAX (Asynchronous JavaScript and XML), which I am sure will revitalize Web development in the days to come.

n d 09/13/06 03:14:52 PM EDT

I am sure that most of you have heard about or have had a chance to use Google Maps. It's a great service and I was really impressed by the responsiveness of the application and the ease with which users could drag and zoom maps from a Web browser. It has in many ways heralded the arrival of AJAX (Asynchronous JavaScript and XML), which I am sure will revitalize Web development in the days to come.

n d 09/12/06 07:00:05 PM EDT

I am sure that most of you have heard about or have had a chance to use Google Maps. It's a great service and I was really impressed by the responsiveness of the application and the ease with which users could drag and zoom maps from a Web browser. It has in many ways heralded the arrival of AJAX (Asynchronous JavaScript and XML), which I am sure will revitalize Web development in the days to come.

n d 09/12/06 06:49:42 PM EDT

I am sure that most of you have heard about or have had a chance to use Google Maps. It's a great service and I was really impressed by the responsiveness of the application and the ease with which users could drag and zoom maps from a Web browser. It has in many ways heralded the arrival of AJAX (Asynchronous JavaScript and XML), which I am sure will revitalize Web development in the days to come.

@ThingsExpo Stories
The 3rd International Internet of @ThingsExpo, co-located with the 16th International Cloud Expo - to be held June 9-11, 2015, at the Javits Center in New York City, NY - announces that its Call for Papers is now open. The Internet of Things (IoT) is the biggest idea since the creation of the Worldwide Web more than 20 years ago.
Cultural, regulatory, environmental, political and economic (CREPE) conditions over the past decade are creating cross-industry solution spaces that require processes and technologies from both the Internet of Things (IoT), and Data Management and Analytics (DMA). These solution spaces are evolving into Sensor Analytics Ecosystems (SAE) that represent significant new opportunities for organizations of all types. Public Utilities throughout the world, providing electricity, natural gas and water, are pursuing SmartGrid initiatives that represent one of the more mature examples of SAE. We have s...
The security devil is always in the details of the attack: the ones you've endured, the ones you prepare yourself to fend off, and the ones that, you fear, will catch you completely unaware and defenseless. The Internet of Things (IoT) is nothing if not an endless proliferation of details. It's the vision of a world in which continuous Internet connectivity and addressability is embedded into a growing range of human artifacts, into the natural world, and even into our smartphones, appliances, and physical persons. In the IoT vision, every new "thing" - sensor, actuator, data source, data con...
How do APIs and IoT relate? The answer is not as simple as merely adding an API on top of a dumb device, but rather about understanding the architectural patterns for implementing an IoT fabric. There are typically two or three trends: Exposing the device to a management framework Exposing that management framework to a business centric logic Exposing that business layer and data to end users. This last trend is the IoT stack, which involves a new shift in the separation of what stuff happens, where data lives and where the interface lies. For instance, it's a mix of architectural styles ...
The Internet of Things is tied together with a thin strand that is known as time. Coincidentally, at the core of nearly all data analytics is a timestamp. When working with time series data there are a few core principles that everyone should consider, especially across datasets where time is the common boundary. In his session at Internet of @ThingsExpo, Jim Scott, Director of Enterprise Strategy & Architecture at MapR Technologies, discussed single-value, geo-spatial, and log time series data. By focusing on enterprise applications and the data center, he will use OpenTSDB as an example t...
An entirely new security model is needed for the Internet of Things, or is it? Can we save some old and tested controls for this new and different environment? In his session at @ThingsExpo, New York's at the Javits Center, Davi Ottenheimer, EMC Senior Director of Trust, reviewed hands-on lessons with IoT devices and reveal a new risk balance you might not expect. Davi Ottenheimer, EMC Senior Director of Trust, has more than nineteen years' experience managing global security operations and assessments, including a decade of leading incident response and digital forensics. He is co-author of t...
The Internet of Things will greatly expand the opportunities for data collection and new business models driven off of that data. In her session at @ThingsExpo, Esmeralda Swartz, CMO of MetraTech, discussed how for this to be effective you not only need to have infrastructure and operational models capable of utilizing this new phenomenon, but increasingly service providers will need to convince a skeptical public to participate. Get ready to show them the money!
The Internet of Things will put IT to its ultimate test by creating infinite new opportunities to digitize products and services, generate and analyze new data to improve customer satisfaction, and discover new ways to gain a competitive advantage across nearly every industry. In order to help corporate business units to capitalize on the rapidly evolving IoT opportunities, IT must stand up to a new set of challenges. In his session at @ThingsExpo, Jeff Kaplan, Managing Director of THINKstrategies, will examine why IT must finally fulfill its role in support of its SBUs or face a new round of...
One of the biggest challenges when developing connected devices is identifying user value and delivering it through successful user experiences. In his session at Internet of @ThingsExpo, Mike Kuniavsky, Principal Scientist, Innovation Services at PARC, described an IoT-specific approach to user experience design that combines approaches from interaction design, industrial design and service design to create experiences that go beyond simple connected gadgets to create lasting, multi-device experiences grounded in people's real needs and desires.
Enthusiasm for the Internet of Things has reached an all-time high. In 2013 alone, venture capitalists spent more than $1 billion dollars investing in the IoT space. With "smart" appliances and devices, IoT covers wearable smart devices, cloud services to hardware companies. Nest, a Google company, detects temperatures inside homes and automatically adjusts it by tracking its user's habit. These technologies are quickly developing and with it come challenges such as bridging infrastructure gaps, abiding by privacy concerns and making the concept a reality. These challenges can't be addressed w...
The Domain Name Service (DNS) is one of the most important components in networking infrastructure, enabling users and services to access applications by translating URLs (names) into IP addresses (numbers). Because every icon and URL and all embedded content on a website requires a DNS lookup loading complex sites necessitates hundreds of DNS queries. In addition, as more internet-enabled ‘Things' get connected, people will rely on DNS to name and find their fridges, toasters and toilets. According to a recent IDG Research Services Survey this rate of traffic will only grow. What's driving t...
Connected devices and the Internet of Things are getting significant momentum in 2014. In his session at Internet of @ThingsExpo, Jim Hunter, Chief Scientist & Technology Evangelist at Greenwave Systems, examined three key elements that together will drive mass adoption of the IoT before the end of 2015. The first element is the recent advent of robust open source protocols (like AllJoyn and WebRTC) that facilitate M2M communication. The second is broad availability of flexible, cost-effective storage designed to handle the massive surge in back-end data in a world where timely analytics is e...
Scott Jenson leads a project called The Physical Web within the Chrome team at Google. Project members are working to take the scalability and openness of the web and use it to talk to the exponentially exploding range of smart devices. Nearly every company today working on the IoT comes up with the same basic solution: use my server and you'll be fine. But if we really believe there will be trillions of these devices, that just can't scale. We need a system that is open a scalable and by using the URL as a basic building block, we open this up and get the same resilience that the web enjoys.
We are reaching the end of the beginning with WebRTC, and real systems using this technology have begun to appear. One challenge that faces every WebRTC deployment (in some form or another) is identity management. For example, if you have an existing service – possibly built on a variety of different PaaS/SaaS offerings – and you want to add real-time communications you are faced with a challenge relating to user management, authentication, authorization, and validation. Service providers will want to use their existing identities, but these will have credentials already that are (hopefully) i...
"Matrix is an ambitious open standard and implementation that's set up to break down the fragmentation problems that exist in IP messaging and VoIP communication," explained John Woolf, Technical Evangelist at Matrix, in this SYS-CON.tv interview at @ThingsExpo, held Nov 4–6, 2014, at the Santa Clara Convention Center in Santa Clara, CA.
P2P RTC will impact the landscape of communications, shifting from traditional telephony style communications models to OTT (Over-The-Top) cloud assisted & PaaS (Platform as a Service) communication services. The P2P shift will impact many areas of our lives, from mobile communication, human interactive web services, RTC and telephony infrastructure, user federation, security and privacy implications, business costs, and scalability. In his session at @ThingsExpo, Robin Raymond, Chief Architect at Hookflash, will walk through the shifting landscape of traditional telephone and voice services ...
Explosive growth in connected devices. Enormous amounts of data for collection and analysis. Critical use of data for split-second decision making and actionable information. All three are factors in making the Internet of Things a reality. Yet, any one factor would have an IT organization pondering its infrastructure strategy. How should your organization enhance its IT framework to enable an Internet of Things implementation? In his session at Internet of @ThingsExpo, James Kirkland, Chief Architect for the Internet of Things and Intelligent Systems at Red Hat, described how to revolutioniz...
Bit6 today issued a challenge to the technology community implementing Web Real Time Communication (WebRTC). To leap beyond WebRTC’s significant limitations and fully leverage its underlying value to accelerate innovation, application developers need to consider the entire communications ecosystem.
The definition of IoT is not new, in fact it’s been around for over a decade. What has changed is the public's awareness that the technology we use on a daily basis has caught up on the vision of an always on, always connected world. If you look into the details of what comprises the IoT, you’ll see that it includes everything from cloud computing, Big Data analytics, “Things,” Web communication, applications, network, storage, etc. It is essentially including everything connected online from hardware to software, or as we like to say, it’s an Internet of many different things. The difference ...
Cloud Expo 2014 TV commercials will feature @ThingsExpo, which was launched in June, 2014 at New York City's Javits Center as the largest 'Internet of Things' event in the world.