Loading gmail connection internet longer page attached bases file kml

Screen overlays cannot be authored directly within Google Earth and are thus more difficult to create than ground overlays. As an example, enable the "Absolute Positioning: Top left" folder in the KML Samples file and you will see a screen overlay at the top left of the view window.

This was created with the following KML code:. In this case, the top-left corner of the image 0,1 has been made coincident with the same point on the screen. Check the other examples in the folder to see how it is possible to obtain other fixed positions, and to create images that size dynamically with screen size. Note that xunits and yunits can also be specified as "pixels" for precision control. For further detail, see the KML 2. The specified file can be either a local file or a file on a remote server.

In their simplest form, network links are a useful way to split one large KML file into smaller, more manageable files on the same computer.

So far, all of our examples have required that the KML code be delivered to Google Earth from the local machine. Network links give you the power to serve content from a remote location and are commonly used to distribute data to large numbers of users. In this way, if the data needs to be amended, it has to be changed only at the source location, and all users receive the updated data automatically.

With some knowledge of a scripting language such as PHP, Python, or Perl, you can create a script that delivers a stream or file of KML data to each network link. The response must be valid KML. For complex applications, proper error handling is very important. Tip: A simple way to handle errors is to parse the server's error as the text for a folder name.

This is more informative and more user-friendly than letting the connection drop. Whenever the network link is refreshed, the Python script runs again and generates KML with new latitude and longitude values. A standard network link is a uni-directional link: data flows only from the server to Google Earth. The view-based refresh enables bi-directional communication.

When the view-based refresh is active, Google Earth returns the view coordinates to the server at a specified time. This may be every n seconds, minutes, or hours, or once a certain amount of time has elapsed since the view stopped moving. The coordinates are returned to the server by means of an HTTP GET that appends the coordinates as follows this is the default bounding box information :. If the request were made while the user was looking down on San Francisco, the coordinates might look as follows:.

This feature can be used for some very creative applications, but to get you started, a simple example is presented below. The following server-side Python script parses the return message sent by Google Earth and responds with a Placemark at the center of the screen. Each time the Network Link is refreshed, a new Placemark is generated.

The principle illustrated in this example can be used for some very complex applications. For example, if you have a database of geographic information, you can extract the coordinates of the viewer, make a call to the database for the data specific to the view, and return it to Google Earth as KML.

When responding to a request from Google Earth or any Earth browser , a KML server must follow a certain set of rules so that Google Earth can correctly interpret its responses. If the server returns invalid KML, the Network Link will stop, deactivate, and output an error message. Ready for more? Also, browse the KML Reference for information on specific elements. Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.

Google Sites allows you to customize your website. You should at minimum put some descriptive text on the page containing the KML files. Check out this Overview of Google Sites for more info on gettings started.

A Network Link file is interesting, but to get the best results, continue to update your files. Then upload your changed file, as you did in Step 3. The new file automatically overwrites the old, so the next time a Network Link is refreshed, new content will be displayed. Google Sites has built in collaboration tools. While editing a Site, click on the More actions button in the top right, and select Manage this Site.

This allows you a variety of options for collaborating with other people, including limiting access to the site, or allowing others to contribute files and edit pages. If you have friends or colleagues you want to be able to upload content to the site, invite them to be collaborators on the site. If you've followed the steps outlined in this article, you now have a web presence for your geographic data, giving your KML files wider visibility.

In short, your files are now available to the world. Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4. For details, see the Google Developers Site Policies. Keyhole Markup Language.

Home Guides Reference Support. Data Types. It's free! They allow you to package multiple files together, and they compress the contents to make downloading faster. This allows you to bundle images along with your KML file if you want. This is similar to the way that web browsers allow you to save complete web pages, including images and style sheets, or just the HTML for a single web page.

Note that these are guidelines, and you're free to choose the approach that best suits your needs. Don't worry too much about KMZ files when you're starting a new project. It's good practice to organize any images you use into a small number of folders, but don't worry about packaging your work into a KMZ until later. When you're ready to distribute your content to others - whether you're posting a file on the web, emailing an attachment to a colleague, or preparing for a presentation in front of a live audience - save your KML file and any images you want to include as a KMZ file.

When you make a KMZ file, you don't have to include images. At the very least, you'll make a smaller file that will download faster. If you want your KML file to reference images on the web, you'll need a web-dependent project.

If you intend to present your project without internet access or to distribute your content to a private group, you'll need a self-contained project. Sometimes you'll want your placemarks to reference images on the web. This could come in handy if you will be updating the images periodically, you want to include attributed images from another site, or if you simply want to reduce the download size of your KMZ file. This is usually a question for your webmaster.

In your KML file, refer to each image on your web site using its absolute path.