The Digital Plani Meter is a precision instrument designed for measuring areas of diagrams, blueprints, and irregular shapes with high accuracy. It supports widths up to 300 mm and unlimited length, making it ideal for large-scale mapping and surveying tasks. Featuring a 16-digit LCD display, it provides clear and accurate digital readouts. The device maintains a low relative error rate of approximately ±0.2%, ensuring reliable results. Powered by a 6V DC internal battery, it is lightweight and portable, with dimensions of 260 × 180 × 40 mm and a weight of about 1.25 kg. Its roller-type tracing mechanism ensures smooth operation, while functions like unit conversion, cumulative, and average measurements add to its efficiency and versatility in field applications.