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Unit 4: Introduction of Networks



            A network link provides a way to deliver dynamic data to multiple Google Earth users. When   Notes
            users connect to your KMZ file via a network link, either you or they can specify how often to
            refresh the data in the file. This way, regular updates made to the content by one person are
            automatically reflected in all connected clients.
            A network link is intended as a view-only reference to published content. Just as web pages are
            viewed by many people but only modifiable by those with permission, place data content can be
            linked to and seen by multiple users while set to be modifiable only by one author. As with web
            pages, users who are viewing the content can always save that content to their hard drive, but
            they can only receive dynamic content via a network link.
            The Figure 4.1 illustrates the parallels between web-based content and KMZ content via a network
            link using Google Earth.

                    Figure 4.1: Parallels between web-based content and KMZ content via a
                                    network link using Google Earth






                          View KMZ files  file 1. kmz
                          on  a network;               HTML Files  View HTML pages
                          Google Earth can  file 2. kmz       on a network; reload
                          automatically                       browser to see any
                          detect any                          changes
                          updates                 View HTML pages
                                       View KMZ files on  on the World Wide
                                                  Web; reload brower
                                       the World Wide Web;
                                       reload network link to  to see  any changes
                                       view any changes


                     Can save KML to local computer only,  Can save HTML to local computer only,
                     but content will no longer be dynamic  but content will no longer be dynamic
                       Network Links with    Your Computer  Web Page Connection
                         Google Earth                     with Web Browser






                          Illustrates the parallels between web-based content and KMZ content via a
                          network link using Google Earth.


            4.1.5 Creating a Network Link

            Before you can create a network link, the content you want to link to must exist on the network
            or web server that you are linking to. If you are authoring the content, if you are only linking to
            the content, be sure you know either the network location of the file or the URL if it is located
            on a web server.

              1. Choose any one of the following ways to start:
                Select Network Link From the ‘Add’ Menu. Select Network Link from the pop-up menu.

                    • Right-click a folder in the ‘My Places’ Panel. Select Add > Network Link from the
                       pop-up menu. When you add a network link in this way, the selected folder is
                       automatically set as the container for the network link.



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