Gravity and Terrain Correction

The Gravity and Terrain Correction extension provides a comprehensive system for processing and reducing gravity data from both conventional ground and moving platform surveys. With its streamlined menu system, you can quickly and easily perform all standard gravity processing steps, including applying terrain corrections using digital elevation models (DEMs) or gridded elevation data. The uniquely optimized terrain reduction algorithm delivers accurate corrections efficiently—even for very large datasets.

Key Functionality:

• Gravity processing and reduction functions

• Terrain algorithm and corrections

Some commonly used functions include:

• Correct base station data

• Manipulate calibration data

• Merge X and Y location data with survey data

• Apply drift and atmospheric tide corrections

• Apply atmospheric corrections to airborne gravity data

• Compute free air and Bouguer anomaly values

• Perform terrain corrections

Working in Oasis montaj requires a project file (*.gpf). A project encompasses all items in your workspace, including:

• Data files such as databases, grids, maps, voxels, geosurfaces, and 3D views

• Visualization tools like histograms and scatter plots

• Project settings, including the menus currently displayed

This structure ensures that your entire working environment is saved and easily restored.

To begin working with the Gravity and Terrain Correction extension, we recommend opening a new project and then loading the menus related to the extension.

Open a New Project

1. On the Project menu select New. The New Project dialog will open.

   You can also select Create new project from the startup dialog that appears when you launch Oasis montaj.

2. In the New Project dialog, specify the name and location for your new project file (*.gpf), then click Save.

3. The new project will open, enabling the main menus, toolbar icons, and the Project Explorer. These visual indicators confirm that the system is ready for use.

Load the Menus

1. On the Project menu, select Manage Menus, or click the Manage Menus icon on the Project Explorer toolbar. The Manage Menus dialog will appear.

2. Expand the Extensions node, select Gravity and Terrain Correction, and click OK. The menus related to the extension will now appear on the main menu bar.

The menu system is designed to provide quick access to a variety of tools and to guide you through the primary processing and filtering workflows in the extension.

Accessing Help

Once the Gravity and Terrain Correction menus are loaded, click the Help button in any dialog opened from these menu items:

• The reference topic for the current dialog will be displayed.

• Use the Help Topics tab to navigate to others topics of interest.

• Use the Search tab to find specific topics by entering keywords.