What is used to measure property size when employing the lot and block system?

The lot and block system is a method used to identify properties through a specific type of documentation known as plat maps. These maps provide a detailed visual representation of a property, including its division into lots and blocks, and they often include information about property boundaries, dimensions, and streets. Plat maps are typically created based on surveys and are essential for legal descriptions in real estate transactions. They help ensure that each individual property can be clearly identified and accurately measured.

In this context, while survey maps do provide important information about property boundaries, it is the plat maps that are specifically designed for easy identification and measurement of property sizes under the lot and block system. Architectural drawings focus more on the design and construction aspects of buildings rather than on property size and layout. Tax assessments are related to the valuation of the property for taxation purposes and do not directly measure property size. Thus, the use of plat maps in the lot and block system makes them the correct choice in this instance.