The location filter (WHERE) allows users to restrict the time use variable currently being created to a particular set of places or modes of transportation. The default selection is all locations, meaning that the times spent in each of the selected activities (given other filter selections) are added together regardless of where the activities occurred. When a location filter is applied, only times spent in the activities (given other filter selections) and locations specified are added together.
Locations are specified for all activities except sleeping (0101xx), grooming (0102xx), personal activities (0104xx), "respondent refused to answer" (500105), and "respondent didn't remember" (500106). In these cases, location is coded as blank (998).