What you can do using Google Earth?
With the help of Google earth, users can place custom images as well as Google SketchUp three dimensional models over view of our planer earth. Image overlays provide users additional data of underlying earth imagery. For instance, users can use map of satellite weather data which updates to reflect the latest weather imagery for that region.
Users can even use imagery of site plan as well as parcel boundaries to view various development stages on particular parcel. You are also able to utilize publicly existed image maps for a lot of activities such as camping trails, theme parks, national park boundaries, theme parks and hiking trails.
Google Sketch Up is software, which lets many users to create three dimensional models and sharing those models with other users. Whenever you are going to create an image overlay then you will specify 3 vital things that are given below
Which kind of image file should be displayed in 3-Dimensional viewer (from your network, from your computer?
How should we fit or position various image boundaries beneath the earth data
What is the view and location of imagery overlay
Taking overlay images are possible from your network, web site, and computer. You must follow any one of the image format such as BMP, JPG, TIFF, GIF, DDS, PNG, PPM, TGA, PNG. Overlays that are formatted in PNG and GIF can be modified because of which undesirable regions like image boundaries are transparent allowing underlying imagery show.
You are also able to make use of topographical map, other geographical image, and weather satellite image maps as overlays. If you wish to obtain examples of overlays then you must take a look at Google Earth community bulleting board.
Now we will discuss the features of image overlays. Once you have created an overlay then with it you can do many things like you can email overlay to your friends. Just like you email other placemark data, you can email overlay as well. Whenever you will email an overlay, which references a local image then that image is included with overlay in an automatic way. You do nit require to include local image in email attachment.
You can save overlays in your computer and even edit their properties as well as settings. The features that we discussed above are common placemark features but there are few other features of image overlays such as you are able to adjust the transparency of any overlay from totally transparent to entirely opaque when it is selected in viewer. When you complete the adjusting transparency process of overlay image then you are able to see how overlay image communicates with 3-Dimensioanl viewer imagery.
When you will complete the process of creating an overlay, at that time it totally incorporates with terrain and shape of the land when the terrain layer is switched on. For instance, you create an overlay of Yosemite National park and also can view the trails in relationship to the 3-Dimensional view of mountains. It means the great mixture of 3-Dimensional viewer and an overlay map provides much data.
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