Purpose of preparing Data drawing –
1) Data drawing is necessary to prepare line plan of proposed structure as per requirements of owner like, number of family members, number of units required, sizes, locations, floors required, etc.
2) It is helpful for owner to get better idea of proposed building and finalize the plan or arrangement of units.
3) It helps an architect to prepare detailed drawings.
Purpose of Measured Drawing –
1) For billing of work.
2) For valuation of building.
3) For altering or making modifications in existing structure.
4) For taking judgement in case of any dispute about area.