§ 143-12. Surveying and mapping.

A. 

General. Procedure shall include temperature and slope corrections to distance measurements; adjustment of closed baseline traverses; presentation of all necessary data clearly and completely; and the use of proper methods to obtain the required standards of accuracy.

B. 

Surveying accuracy. The position closure of a traverse after distribution of azimuth errors shall not exceed 1:5,000. Discrepancies in levels between forward and backward runs shall not exceed 1/10 of a foot times the square root of the length of section in miles.

C. 

Mapping accuracy. The limits of error in any map shall not exceed 1/10 inch between points as scaled on the original map. The elevation error shall not exceed 1/2 the contour interval.

D. 

Monuments and bench marks.

(1) 

Monuments shall be located in sufficient number to control the subdivision, but, as minimum, they shall be located at every point of tangency, point of curvature and point of deflection and all intermediate points necessary to provide visibility between adjacent monuments along one right-of-way line of each street. All easements shall be similarly monumented. Iron pipes shall be located at all lot corners and shall be located by reference to monuments.

(2) 

Bench marks shall be set and marked with United States Geological Survey elevation unless an assumed datum is allowed by the Board. One bench mark shall be required for every 25 acres developed.

(3) 

Monuments and bench marks shall be carried from existing monuments or bench marks and their origin noted on the subdivision plat. Suitable primary control points shall be shown on the plat, and all other dimensions, bearings, angles and similar data shall be referred to them.

E. 

Certification. The following certification accompanied by the imprint of the New York registration seal of the land surveyor and his name shall be included on the subdivision plat: "I hereby certify this map to be substantially correct and in accordance with the accuracy required by the Town of Malta Subdivision Standards."