Geophysical Survey Systems, Inc.
SIR® 4000
Manual
MN72-433 Rev F
59
Chapter 4: Using Quick3D Mode
Quick3D mode is designed to help you easily collect 3D data on an area of any size and surface with
some obstacles. By entering the grid size and profile spacing the SIR 4000 can show the current survey
location and guide you through 3D data collection. During the survey each individual radar profile is
saved as it is collected. At the end of the grid, the SIR 4000 creates a special folder and file which contain
positioning information. This information is then used by RADAN to quickly build and display the 3D
data. You can also view the 3D data on the SIR 4000 after collection and perform some processing
functions such as applying FIR/IIR Filters or performing Hyperbola Fitting. Quick3D allows you to skip
the 3D file creation process in RADAN and allows you to analyze your 3D data in the field.
The next section explains the file structure of a Quick3D file. The subsequent sections explain the field
use and implementation of Quick3D files in RADAN.
4.1: Quick3D File Structure
Quick3D data collection mode creates a folder on your SIR 4000 with the name of the grid followed by
the extension 3DS. Inside of that folder are all of the DZT files, DZX files, and a file with the extension
BZX. The individual profiles are the DZT files and each one has a corresponding header filer, the DZX.
The BZX is a grid assembly file that tells RADAN how to assemble the individual files into a grid.
•
In the screenshot, a 50 foot x 50 foot
area was surveyed in one direction
only with profiles spaced every 2 feet.
This survey created 26 DZT and DZX
files (1 every 2 feet including the line
at 0) and 1 BZX file. The Grid was
named GRID__003.3DS. The grid
name was automatically generated by
the SIR 4000 within the project folder,
COMMON.PRJ.
•
The BZX file is an information file
which tells the RADAN software
where each DZT file is positioned and
directs the software to create a 3D file
with the proper positioning
information. Opening the grid in
RADAN is as simple as opening the
BZX file.
•
The project folder will also contain a subfolder
called Proc. This folder contains DZP files that
are used to playback the 3D data on the SIR
4000. They are not necessary for 3D viewing or processing in RADAN.
•
When transferring data from the SIR 4000 to a PC running RADAN, the entire Grid folder is
transferred. In order for the BZX file to work all of the DZT and DZX files must be kept in the
same folder as the BZX file.
In summary each grid is saved in a separate folder under the project folder. Inside each folder are all of
the individual radar profiles (DZT and DZX files) and one BZX file. The BZX file tells RADAN where to
put each profile to create a 3D grid.
Note
:
You must keep the BZX file and all
of your data files together in the same grid
folder.
Summary of Contents for SIR 4000
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