User manual

U-See User Manual - Settings Menu
Through this dialog the source for terrain elevation in the software can be established. It
will affect all software terrain related displays.
To add a source, click on the button “New Layer”.
The valid sources for elevation data are:
• IGN-ASC files: Spanish specific version of widely availabel ASC format, as published
by national geographic institute.
• GeoTiff Source: Geo-referenced Tiff files.
• DTED Source: Standard elevation format.
Besides sources of elevations, it is also important to define the priority of these sources.
Each source has an attached order which is managed by moving the sources up and down
in the sources stack.
When a terrain elevation is needed, software will request said elevation from the first
source in the list (Query sequence can be confirmed through the ID column in the stack
display). If the elevation was obtained, it will stop there; if not, it will request the next
source available in the list. In case no custom source is available, the elevation will be
obtained from the default DEM model.
Be advised that if a very big DEM model is loaded (> 100 Mib) there could be a delay of a
pair of seconds between the loading of the file and its output is propagated to the rest of
the software.
This default DEM model is a nearly global land coverage model (between 60°S and 60°N)
with a grid spacing of around 1km.
Each source has to be assigned a name, a source associated filename, its type and for
every source, elevation reference has to be manually established. Usually elevation data is
given from the reference geoid associated with the coordinate system, however,
sometimes files are encoded using elevation from the reference ellipsoid. User is required
to input this information. Available Options for the “File Altitude Data Reference”
• Reference Geoid: File contains elevation data as measured from the reference geoid
(roughly equivalent to above mean sea level)
• Reference Ellipsoid: The file contains elevation data measured from the reference
ellipsoid (sometimes this is referenced as GPS altitude).
Automatic Record Data
U-See can be configured to automatically start recording data files once it is started. This
eliminates the need for the operator to remember to record the telemetry before every
flight as it is done automatically for him.
In this section a folder for automatic recording can be selected (Default will be
C:\User\<USER>\Documents) and a basename for the recording files.
When enabled, the program will start automatically record any data that enters the
telemetry system to disk. The filename generated will be:
<BaseName>_DD_MM_YYYY-HH_MM_SS
Where:
• DD is day of the month
• MM is month numbered
• YYYY is year
• HH is hour at start of recording
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