50-1304 ESSENTIALS OF PLATS.
MUNICIPAL CORPORATIONS
CHAPTER 13
PLATS AND VACATIONS
50-1304. Essentials of plats. (1) All plats offered for record in any county shall be prepared in black opaque image upon stable base drafting film with a minimum base thickness of 0.003 inches, by either a photographic process using a silver image emulsion or by use of a black opaque drafting film ink, by mechanical or handwritten means. The drafting film and image thereon shall be waterproof, tear resistant, flexible, and capable of withstanding repeated handling, as well as providing archival permanence. If ink is used on drafting film, the ink surface shall be coated with a suitable substance to assure permanent legibility. The drafting film must be of a type which can be reproduced by either a photographic or diazo process. Plats shall be eighteen (18) inches by twenty-seven (27) inches in size, with a three and one-half (3 1/2) inch margin at the left end for binding and a one-half (1/2) inch margin on all other edges. No part of the drawing or certificates shall encroach upon the margins. Signatures shall be in reproducible black ink. The sheet or sheets which contain the drawing or diagram representing the survey of the subdivision shall be drawn at a scale suitable to ensure the clarity of all lines, bearings and dimensions. In the event that any subdivision is of such magnitude that the drawing or diagram cannot be placed on a single sheet, serially numbered sheets shall be prepared and match lines shall be indicated on the drawing or diagram with appropriate references to other sheets. The required dedications, acknowledgments and certifications shall appear on any of the serially numbered sheets.
(2) The plat shall show: (a) the streets and alleys, with widths and courses clearly shown; (b) each street named; (c) all lots numbered consecutively in each block, and each block lettered or numbered, provided however, in a platted cemetery, that each block, section, district or division and each burial lot shall be designated by number or letter or name; (d) each and all lengths of the boundaries of each lot shall be shown, provided however, in a platted cemetery, that lengths of the boundaries of each burial lot may be shown by appropriate legend; (e) the exterior boundaries shown by distance and bearing; (f) descriptions of survey monuments; (g) point of beginning with ties to at least two (2) public land survey corner monuments in one (1) or more of the sections containing the subdivision, or in lieu of public land survey corner monuments, to two (2) monuments recognized by the county surveyor; and also, if required by the city or county governing bodies, give coordinates based on the Idaho coordinate system; (h) the easements; (i) basis of bearings; and (j) subdivision name.
(3) When coordinates in the Idaho coordinate system are shown on a plat, the plat must show the national spatial reference system monuments and their coordinates used as the basis of the survey; the zone; the datum and adjustment; and the combined adjustment factor and the convergence angle and the location where they were computed.