Release Notes MicroImages, Inc. TNT-Products V. 6.8

RELEASE OF RV6.8 TNT PRODUCTS
stack on the sides of the polygons are assigned using another table containing the rock
unit names.
sth elens3.sim (8 Mb).
This Landscape File shows the volcano Mount St. Helens in southwestern Washington
State, USA. A texture layer covering the entire terrain layer shows color shaded relief,
blending color-coded elevation with hill shading. Two partial texture layers show color
band combinations from Landsat Thematic Mapper satellite images. One shows a
color-infrared band combination and the other a natural-color band combination. Each
partial texture layer or raster object covers exactly the area shown (they are not padded
with null cells to cover the full extent of the terrain). Three B&S symbol layers are also
included, showing the positions of ranger stations and visitor centers, survey locations
for monitoring the volcano, and radio towers. Most of these B&S symbols were designed
to sit on the terrain without stalks (they have height = 0) while the survey points
are extruded above the surface on stalks.
FFbasin4.sim (13 Mb).
Two stacked terrain surface
layers are used in this geosimulation covering a small de-
sert basin
in southern Nevada, USA. One terrain layer represents the ground surface
and has two texture layers-a color shaded relief image and a natural-color Landsat sat-
ellite image. The other terrain layer, which covers a slightly larger area, represents the
upper surface of pre-Cenozoic basement rocks beneath the basin fill. Its texture layer is
a color-shaded view of the basement surface. Parts of the edge and interior of this texture
layer where there was no data are transparent. The elevation values in the basement
terrain layer are 5000 meters below their true elevations relative to sea level. This
downward offset of the basement surface makes it easier to view both surfaces at the
same time from the edge of the scene. You can turn off the ground surface texture layer
to view the entire basement surface layer or try flying between the two terrain layers.
Roanoke7.sim (34 Mb).
This geosimulation
of the Roanoke, Virginia (USA) area has two adjacent terrain layers,
each representing the ground surface over half of the geosim (north and south). Each
terrain layer has a complete color shaded relief texture layer and two partial texture layers.
The partial texture layers are extracts of color digital orthophoto quadrangle images
with 2-meter spatial
resolution, providing a virtual image mosaic covering the central
part of the scene.
The source images for the orthophotos were acquired as 1-meter
MrSID compressed files, which were converted directly in the TNTmips Landscape
Builder to partial texture
layers linked as lossy-compressed JP2 files. Without the
JPEG2000 compression this Landscape File would be much larger.
TNTatlas RV6.8
TNTatlas.
®
TNTatlas continues to be a free and relatively unique approach to distributing geodata
along with a suite
of interactive, but local GIS analysis tools. It continues to be disturbing
to see TNTatlas
listed along side simple viewers. Yes, TNTatlas can be used as a
simple viewer since it will let you view any single geodata file format that can be linked
MICROIMAGES MEMO 38
5 MAY 2003