Click the Home | New Graph | Contour Surface | Surface Grid Map command to create a surface grid map. Surface grid maps are created from grid files, types of which include .GRD, .DEM, .DDF, .HDR, and .DTED. If your data is in a regular array of Z values, you may convert it to an ASCII .GRD file format.
A surface grid map
is created from a grid file.
Creating a New Surface Grid Map
To create a surface grid map:
Click the Home | New Graph | Contour Surface | Surface Grid Map command.
Select a grid file in the Open Grid dialog. You can select a new grid file or you can select an open data file in the Open grids section.
Click the Open button. A surface grid map is created using the default properties.
Editing Surface Grid Map Properties
Click the following tabs in the Property Manager to change different properties: