Layout of a building or a structure shows the plan of its foundation on the ground surface according to its drawings, so that excavation can be carried out exactly where required and position and orientation of the building is exactly specified. It is set out according to foundation plan drawings and specifications provided by the engineer or an architect.In order to understand layout or setting out of a building we must understand some of the technical terms related to this job which are described below.
BASELINE
A baseline is a straight reference line with respect to which corners of the building are located on the ground. It may be outer boundary of a road or curb or boundary of the area or simply a line joining any two points.