NASA World Wind Features
The NASA world provides more features than any other similar product. These features are not only more in number however, they also are better in the provision of data.
3D Engine: This is the feature by using, which, the users of the NASA world wind can browse through the imagery. They can move from one point on the map to the other. While doing this if they wish to view the details of a point of interest they can zoom in on that point. On doing this, the NASA world wind would display the 3D details of the different things and texture of at that point. The leveraging high-resolution LandSat imagery and in addition to this the SRTM elevation data present a3D and virtual experience while browsing through these images.
As the users can zoom in at any point, they can also zoom out of any point and then again search for other places in the world. This 3D engine is very simple to use as it was designed with the purpose of being used by the common people. It can be used with the help of the simple controls as the clicking on a point of the map to center that point, scrolling in and scrolling out for zooming in and out of the images, etc.
Blue Marble: The ‘Blue Marble’ is the images of the earth taken from the Blue Marble satellite of NASA’s Earth Observatory. It is a collection of the images of the whole world and they cover the most of the world. The important advantage of these images is that they present the real color images as they appear from the satellite.
Land Sat 7: This feature has an important role in the provision of data whenever the user zooms in at a point. It is a set of collection of the images having resolution a resolution of 15m per pixel. They were taken between years 1999 to 2006. These images also feature the infrared color bands for example the infrared spectrum. The NASA world wind constantly tries to update them and therefore they contain all the correct and present data. These images make it possible to study the different things as houses trees etc, in a particular place.
The complete data that the Land Sat 7 contains is just too large and does not fit on a single machine. Therefore, whenever the user accesses it, the NASA world wind downloads only the data related to the current selected place only. In addition this, it stores on the users computer so that he can later on view them.
SRTM: Its full form is Shuttle Radar Topography Mission. It contains the images at such a resolution that the users may feel that they are really flying over that place. These too are 3D images with the real colors. The viewers can go from one place to another while these images are on, just like browsing through the other images of the NASA world wind. Because of all this, it provides the user an experience as they are flying at that place and observing all those places with their eyes.
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