True or False: NAD83 State Planes are in meters, but states clarify which type of feet should be used in their state.

The statement is true because the North American Datum of 1983 (NAD83) is a geocentric datum that generally utilizes meters as its unit of measurement in the State Plane Coordinate System (SPCS). However, within various states, there are historical conventions that dictate the type of feet to be used when working with local surveys or mapping. Some states have adopted the U.S. survey foot, while others may use the international foot or meters, depending on the context or existing regulations. This duality allows states to clarify how measurements should be interpreted, particularly when integrating GIS data with traditional surveying practices. Thus, the clarity provided by states regarding the type of feet reinforces the necessity for users to be aware of the conventions in their specific areas when conducting geographic analyses.