A chain of hardware stores has databases of purchases. To use theses date bases in a gis they must be tied to

locations on a digital map

Explanation:

its the answer for apex

GIS stands for Geographic Information Systems.

GIS is an environment which is used for collecting, storing, manipulating, analyzing and visualizing geographical data.

The most important aspect of GIS is its capability in handling data with locational attributes which are geographical data.

To use data from the database from a chain of hardware stores, the data must be tied to their respective location i. e they must locational attributes.