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Nesis III User's Manual
12.8.4
Disable
The Disable command disengages all servomotors connected to the system.
This action is immediate and the user is not asked for any confirmation. The
route or direct-to waypoint selection remains unchanged.
12.8.5
Level
The Level command is the only autopilot command that activates both servos.
When the command is issued, autopilot keeps aircraft leveled. It does not
follow any course and it does not maintain any particular altitude.
13
Maps
Nesis uses two different map principles that are combined into one system
using layers technique:
• Vector map with elevation data. This map principle is using vector
information to draw a map. Most entities like road, railroads, rivers,
etc. are drawn as lines and filled areas at run time on top of a elevated
terrain image.
• Raster map. This map comes already fully prepared - it is like a very
big photo, with all possible details included in the photo.
Both these map principles, which seems to be exclusive, are combined together
using layers technique.
All map information is always drawn as a part of globe. No fixed projection
is used. The projection is dynamic and automatically adapts according to
the zoom level and current position. This was achieved by using the high
performance graphics OpenGL system.
13.1
Layers
The map shown on Nesis consists of several layers, which are drawn on top of
each other.
• Low resolution worldwide terrain presented as a globe is the most bot-
tom layer. This layer is hidden most of the time by the high resolution
terrain layers. Figure 90a shows example of this layer.
122
13. Maps
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