trendsoli.blogg.se - World wind nasa

WORLD WIND NASA UPDATE
WORLD WIND NASA PROFESSIONAL

NET runtime environment and DirectX runtime. NET runtime environment and DirectX installed. Here is a list of video cards that have been reported to work with World Wind. If you don't know whether your machine comes with one, it is likely to have one built in if the computer was purchased within the past two years. World Wind benefits most from a video card with 3D acceleration.

Intel Pentium 3, 1 GHz, or AMD Athlon or higher.

WORLD WIND NASA PROFESSIONAL

Windows 2000, XP Home, or XP Professional.

You may use it under the terms of the NASA Open Source Agreement.

WORLD WIND NASA UPDATE

NASA World Wind is available as a full install, or as an update to a previous release. Look across the Andes, into the Grand Canyon, over the Alps, or along the African Sahara. Leveraging Landsat satellite imagery and Shuttle Radar Topography Mission data, World Wind lets you experience Earth terrain in visually rich 3D, just as if you were really there. See the NominatimGeocoder API doc to determine the details of the returned results and the accepted query string parameters.World Wind lets you zoom from satellite altitude into any place on Earth. An example of doing this is in LayerManager.js. These coordinates can be passed to a GoToAnimator to move the navigator smoothly to that geographic position. Two important properties of each result are its lat and lon properties, which identify the latitude and longitude of the place. More than one place may be identified each is represented by an element in the return array. The results are parsed JSON and contain a wealth of information about the places found that match the query string. The arguments to the callback function are, in order, a reference to geocoder and an array of query results. The callback function is called when the service replies. The query string is sent to the geocoder service. The arguments to this function are a query string and a callback function. The NominatimGeocoder has one function, lookup. An example of its usage is in LayerManager.js. Web WorldWind provides the NominatimGeocoder that uses Open Street Map’s Nominatim geocoder at MapQuest. Geocoders convert query strings identifying places to geographic locations and other useful information. You can change the time it takes to perform the animation via the travelTime property. Use a Position if you want the end position to have a different altitude than the start position. Use a Location if you want the start and end positions to have the same altitude. To use this class you pass its goTo function either a Location or a Position.

You can see example usage in LayerManager.js. To change the navigator smoothly, use the GoToAnimator class. roll - The navigator’s angle around an imaginary line from the eye position to the look-at location.A value of 0 points the user straight down on the globe. tilt - The navigator’s tilt, in degrees.heading - The navigator’s heading, in degrees clockwise from north.The navigator also has the following properties that the app can set: For that use a GoToAnimator, described below. Ideally the view would change incrementally and smoothly. = 2e6 // 2 million meters above the ellipsoid Adjust the Navigator to place Alaska in the center of the

range - Indicates the eye distance from the globe’s ellipsoid.īy specifying these properties the app can move the user to any point around the globe, as in this example: // Get a reference to the WorldWindow.

lookAtLocation - Indicates the latitude and longitude of where the user’s view is pointed.

The navigator has two primary properties allowing control: But it’s certainly possible to direct the navigator from the app itself. Unless an app wants to change the user’s view programmatically, it never needs to interact with the navigator. You can directly modify the properties of the WorldWindow’s GoToAnimator to change the go-to travel time or update frequency, or to cancel a previously requested go-to request. If all you want to do is move the view to a geographic location or position (a location with altitude), you can use the goTo function of WorldWindow to do that.

Controlling the View from the WorldWindowĬontrolling the View from the WorldWindow.

A navigator is created automatically when you create a WorldWindow. That navigator is responsible for the view onto the globe. As the user interacts with the globe, panning, zooming and tilting, it’s the WorldWindow’s Navigator that translates the user’s movements into operations on the globe.