Project Description The Consultant team will perform Geodetic Engineering to complete the following project. The project will entail developing a network of Low Distortion Projection (LDP) coordinate systems to cover prioritized areas of WA State (WA) referencing the new NGS reference frame called the “North American Terrestrial Reference Frame of 2022 (NATRF2022)”, which will be the basis for the “State Plane Coordinate System of 2022 (SPCS2022)”. The Project Work below may be added to or removed from the contract by work authorization or supplementary agreement. The following tasks will need to be completed: Phase One (Tasks 1 & 2) Task 1 WSDOT is requesting a design of a multi-zone LDP coordinate system to provide partial coverage for WA state, as prioritized further in this document. The intent is to submit the designs to NGS so that it officially becomes a partial coverage layer of SPCS2022. As such, the designs must meet NGS SPCS2022 Policy and Procedures in effect at the time of submittal. The zones will need to be designed so the map projection linear distortion at the topographic surface will be within +/-20 ppm (1:50,000) in most areas, with a distortion of +/-40ppm allowable in certain areas of some zones (due to dramatic terrain relief, etc.), as detailed below.
