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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
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