A Reference Plan Survey is a permanent publicly stored and accessible plan that is deposited in the local Land Registry Office. They are graphical representations of descriptions of land as well as representations of divisions of land under the provincial Planning Act.A reference plan is necessary for a severance. Each Land Registry Office has a unique number, and the number of the reference plan includes the number of the LRO in which it is deposited.Reference plans show the surveyed boundary and dimensions and distinct physical or documentary evidence that could affect the title to the property possibly including the location of landscaped features such as fences hedges retaining walls and overhead wires.