GEDCO-Basic Land Tutorial May 2010

This tutorial gives step by step instructions to lay out a
basic orthogonal land survey. You will learn how to create
a project, lay out shots and receivers, and to change how
stations are displayed and numbered. You will also learn
how to automatically fill a survey Boundary (outline) with
shots and receivers.
Set parameters as described or shown in pictures of dialogs.
As you work, use OMNI 3D’s Popup Help to see
explanations of all available parameters. Hover your cursor
over a parameter or click the question mark in the upper right
of a dialog and then click the parameter for Popup Help.
Working with this Tutorial
Go to Help | Load Tutorial Solutions and open the Land folder. The folder contains both the
input data for this exercise and the completed solution project. (Please see the end of this tutorial
for information about working with the solution project.)
To complete this tutorial you will need this file:
...\Tutorial\Land\Basic Land Example-Data\Boundary Points.pnt

Basic Land Survey Layout
This is a basic tutorial. We will start by creating a project.
Double-click the OMNI 3D icon on your Desktop to start the program. When OMNI 3D opens,
go to File on the OMNI 3D Main Menu and select New. Create a directory for your project and
name it “2D Ray Model”. The result is a database file (2D Ray Model.odb) and a corresponding
folder (2D Ray Model-files).
Select the Projection system for this project as
shown in the dialog to the right.
In the Project Tree, right-click on the Surveys
folder and select Create New Survey | Empty
Survey.
Name the survey “Basic” and save it in the Basic
Land-files directory.

Create Sources
Right-click on Shots under the name of the survey (Basic.osd) and select Add Shots | Add
Lines Wizard. You will use the Shots-Survey Size Definition dialog to set up a grid of sources.
The diagram updates as you change parameters. Blue represents the direction in which shot
station numbers increase (Sht In-Line bearing), red is the direction in which line numbers
increase (Sht X-Line bearing), and green is the direction of the lines when a Skew is applied.
When no skew is applied the green line is parallel to the blue line.

 

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