Cabinet Regulation No. 143 (Prot. No. 16 § 20) on protected alleys.

The boundaries of protected alleys are determined in the Latvian geodetic coordinate system (LKS-92), which is determined as Mercator transverse projection plane coordinates (LKS-92 TM), using as a cartographic basis an orthophoto map on a scale of 1:10,000, the data of the State Real Estate Cadastre Information System and State forest register data. The boundaries are determined without conducting an instrumental survey of the boundaries in the area. Until the instrumental survey of the boundaries in the area, deviations of the boundaries are allowed within the limits of certainty of the scale of the map used, according to the actual boundaries in nature. The geospatial data of the boundaries of protected alleys are available in the Natural Data Management System in accordance with the regulatory enactments on the procedure for maintaining the natural data management system, updating data and information circulation.