100% Grid Areas (sometimes known as 100% Transect Areas) are areas within the site that have been completely covered by Geophysical surveys. This is opposed to the usual case where only a small portion of the site is surveyed by geophysical detectors at widely spaced linear intervals, referred to as transects. The assumption is that all anomalies within the 100% grid areas have been found and mapped.
Note that this section will be disabled for the Create 100% transect areas from sample areas design. That design creates and tracks 100% Transect Areas that cover entire sample areas. This section is for smaller areas inside of sample areas.