Grid layout and orientation
ENVI-MAG Manual B2-7
Planning
Grid layout and orientation
The underlying principle behind the layout of a survey grid is that the survey lines
should cross linear bodies at or close to 90 degrees. For very long and narrow
structures such as are encountered in mineral exploration applications, the
survey lines are laid out along perpendicular to the strike, therefore optimizing
the coverage of each line.
Long structures or bodies which are aligned in a parallel fashion are not usually
encountered in environmental applications (except pipelines), the direction of
the targets are most often random. Consequently, most environmental grids are
laid out in square pattern.