(a) Datum. The vertical and horizontal positioning for all public works and engineering projects shall be furnished using the latest datum produced by the National Geodetic Survey (NGS). The project datum is to be collected following the latest version of the Ohio Department of Transportation (ODOT) Survey and Mapping Specifications.
(b) Surveys. Surveyors shall use:
(1) ODOT Path 1, 2 or 3;
(2) Survey grade Global Navigation Satellite System (GNSS) receivers and antennas;
(3) The United States Continuously Operating Reference Stations (CORS); and
(4) Shall process the data using the Online Positioning User Service (OPUS) for all control points.
(5) Any other survey methods to establish project datum requires the approval of the City Engineer.
(c) Grades. All grades hereafter established by the City shall refer to this process to establish a project datum.
(1964 Code 103.01; Ord. 2021-23. Adopted 12/29/21)