Ohio law mandates that the County Engineer create and organize the tax maps of his community. These tax maps must be updated on a daily basis to reflect changes in property ownership. This responsibility entails creating and maintaining a detailed inventory of every parcel of land in the county. A map must be drawn for every parcel of property in the county and this map must be to scale. The scale required by law is at least one inch for every quarter mile, but heavily populated areas require a greater definition in the drawings. The County Engineer must ensure the accuracy of the property surveys. The County Auditor's office uses these detailed tax maps as its official record for property tax purposes.