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Clipmap-based Terrain Data Synthesis Malte Clasen
 

Summary: Clipmap-based Terrain Data Synthesis
Malte Clasen
Zuse Institute Berlin
Hans-Christian Hege
Zuse Institute Berlin
Abstract
Satellite images of the earth are currently commercially available in resolutions from
14.25m (Landsat 7) up to 0.61m (QuickBird). Visualizing large terrains or whole plan-
ets at these resolutions requires highly efficient level-of-detail techniques to reduce the
amount of information to the capabilities of the display device. The same applies to
simulations that drive a visualization pipeline: Although the data could be computed
at very high resolutions, it is often not desirable to generate more information than the
visualization part can display.
We describe a conceptually simple terrain rendering pipeline that handles on-the-
fly data decompression and synthesis in a unified process. Possible data sources range
from static satellite imagery over per-texel-processing such as image blending routines
to light-weight simulations and synthesizers such as noise and filter based texture gener-
ators. These sources are evaluated in multiple threads and the generated data is fed to a
geometry clipmap backend that enables high throughput and requires no preprocessing
such as tesselation.

  

Source: Andrzejak, Artur - Konrad-Zuse-Zentrum für Informationstechnik Berlin

 

Collections: Computer Technologies and Information Sciences