Final answer:
The metes and bounds system is the most accurate method for describing irregularly shaped parcels of land due to its flexibility and ability to reference natural landmarks.
Step-by-step explanation:
The type of legal description that will most accurately describe an irregularly shaped parcel of land is metes and bounds. This system was introduced by English settlers and involves describing the boundaries of a property using reference points, distances, and angles. The metes and bounds system allows for a great deal of flexibility, which is necessary to account for the unique features and contours of irregular land parcels.
The lot and block system is more suitable for describing land within subdivisions or urban areas where properties are more uniform. The Rectangular Survey System, also known as the Public Land Survey System (PLSS), uses a grid system and is less suitable for irregularly shaped properties. Lastly, a plat map is a map drawn to scale showing the divisions of a piece of land but may not be as specific as metes and bounds in describing the unique characteristics of a particular parcel.
It's important to note that metes and bounds can be very detailed, referencing local landmarks such as trees, boulders, or streams to demarcate boundaries. However, this precision can lead to issues if these natural landmarks change or disappear over time. Despite this, for irregularly shaped parcels, metes and bounds remains the most accurate descriptive method.