Background:
In addition to manually changing the elevation of areas on the baseboard,
Trainz provides a way to use bitmap images to raise and lower the elevation.
These are discussed on the page that describes the
Topology Panel
.
If you want to model a real world layout, you may want to download
two data sets and two programs that are available on the Internet, but which
work together to help provide elevation to the surface for your layout's baseboard
and, optionally, paste an image showing locations of streets and the rail line on it.
1.
The first data set is called "DEM" (Digital Elevation Model) data.
It's a database, prepared for areas within the United States, by the U.S. Geological Survey
with elevation data for 90 meter, 30 meter and 10 meter intervals over the U.S.
This type of data is also available for other countries from various local agencies,
(often at considerable cost).
With the help of the "MicroDEM" program, described below, this data can be transformed
into a computer image, where different shades of color are used to represent the various
elevations. Then, with the help of the "HOG" program, also described below, the image
can be used to change the elevations on your Trainz baseboard.
2.
The second data set is called TIGER
(Topologically Integrated Geographic Encoding and Referencing system)
data.
It is a computer image map showing roads, rivers, lakes, rail lines, and other features.
In this image, each feature is represented by a different color.
The MicroDEM program can also display this data as a computer image that it can be placed on your
Trainz baseboard by the "HOG" program, described below.
3.
The first of the two programs is called MicroDEM.
It is a microcomputer mapping program written by
Professor Peter Guth of the Oceanography Department, U.S. Naval Academy.
It displays and merges
digital elevation models,
satellite imagery,
scanned maps,
vector map data, and
GIS databases.
from sources such as
US Geological Survey,
National Imagery and Mapping Agency,
Census Bureau,
National Ocean Survey,
British Ordnance Survey,
Landsat TM, and
SPOT.
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4.
The second of the two programs is called HOG. It's a Trainz terrain generation tool
written by Adam Wojcieszyk, a Trainz user.
It is a utility to create Trainz ".gnd" files out of ".tga" images.
Once the ".gnd" file is created, it can be used to replace the ".gnd" file that Trainz
includes when you create a new single-baseboard, empty layout, (more about this later).
Starting with a new one-baseboard layout, HOG will add as many baseboards as needed to cover
the area described by the DEM image you give it. If you also supply the TIGER image, that
MicroDEM created, it will paste this image on the baseboard surface.
Finally, it can identify rail lines in the TIGER image, (by their color) and trim baseboards
that can't be seen from the rail line. All of this is under your control because you tell
HOG which images to use and how many buffer baseboards to include when trimming,
We go into more detail about this below.
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