Odom ECHOSCAN, Manual

Page: 26 / 44

04/26/02 26
Revision 1.11
extension is necessary if several survey lines are to be later
combined into a single XYZ file.
Creating a Matrix
Here the operator establishes the bounds of the survey area and grid
pattern.
5- Open HYPACK for Windows 6.4 / Preparation / Design / Draw /
Track Lines and select the .log file just created. Track lines should
begin to plot on the screen.
6- When the track lines are complete, select Design / Matrix / New
MTX File and define the area by clicking on the handles and
dragging them as required. Under Design / Matrix / Matrix Length ,
define the Cell Length and Cell Width (usually 5 feet or 2 meters).
Under Design / Matrix, Save the matrix with a .mtx extension.
Sorting and Mapping
Next, it is necessary to sort the data points into “bins”, map the data into
the previously defined matrix, and create the final XYZ file.
7- Go to Sorting / Mapper / File / Open Matrix and select the matrix
defined in the previous step. Open the current .log file. The
program will now begin reading all data points and plotting each line.
8- When data plotting is complete, go to Mapper / File , name and save
the data in .xyz file format.
The completed XYZ file is now portable for postprocessing by HYSWEEP,
TerraModel, AutoCad, Inroads, or any one of a number of data plotting
software packages. For demonstration purposes, TerraModel is used
because of its colorful Digital Terrain Models (DTM).
Non-Standard System Configurations
On rare occasions, it may be necessary to adjust ECHOSCAN to
compensate for out-of-the-ordinary conditions. There are unusual
situations where soft bottoms, at extreme depth ranges, will result
in very weak receive signals -- especially if the bottom is sloped.
Loss of signal alarms will result and large “spikes” will appear on
the LCDU display. At the other end of the spectrum, very hard
surfaces (possibly manmade structures) at very shallow depths
may cause exceptionally strong signals that tend to introduce
multipath interference or saturate the receiver electronics. Both are