ABSTRACT
Spatial precision (also known as positional precision) is the level of spatial exactness that can be achieved when collecting or analysing spatial data. This term is commonly used in archaeological surveying when referring to the degree of measurement exactness achievable with a specific measurement tool. The baseline/offset technique is simple, effective and accurate over small areas and is therefore a standard part of archaeological field methods. It can also be adapted to vertical surfaces, such as standing structures or, for example, to create a cross-section through a rockshelter. Site plans are one of the most common types of archaeological illustration and can convey spatial information about a site quickly and easily. Plan drawings can use the measurements taken from a baseline and offset, compass and pacing survey or dumpy level survey and convert these to a suitable scale to fit on to a sheet of graph or drawing paper.
