The Mapping Department is part of the Assessor's Office and provides information of accurate inventory of all taxable land within their districts. Maps are necessary to graphically represent, on a small scale, the earths surface and man's relationship to it. Legal descriptions and conveyances describe the location of a property and its outline or boundaries. Unless this information is graphically displayed, it is often difficult if not impossible for an Assessor to know certain information about a parcel and that parcels relationship to surrounding property. Maps do this. That is why they are so important in the assessment process. Three basic responsibilities maps do to help the Assessors are discover, list and appraise.