Specifications include, but are not limited to: The Matanuska-Susitna Borough has a desire to obtain high resolution/accuracy oblique and ortho aerial imagery in the remote Lake Louise area of the Borough in the summer of 2022. The area of interest is approximately 206 square miles on the eastern border of the Borough. All delivered digital orthoimagery shall meet or exceed the specifications outlined in USGS’ Digital Orthoimagery Base Specification V1.0, Chapter 5, Section B, Book 11, 2014, except for the following changes and clarifications (page numbers reference the USGS spec): • Geographic Extent (pg. 1-2) - The tiling schema will be based on Borough tax map grid. • Use and Distribution Rights (pg. 2) - All top down Ortho-Imagery and data delivered shall be free from restrictions regarding use and distribution. Data and documentation provided as part of this acquisition shall be freely distributable in the public domain. • Acquisitions Conditions, Vegetation Conditions (pg. 2; #6) – spring or fall leaf off imagery is preferred, a 2022 acquisition takes priority over leaf off conditions. • Acquisitions Conditions, Image Coverage (pg. 2;· #8)- It is understood that the tile schema and zone boundaries many not align perfectly; as a result, partial tiles are acceptable if a portion of the tile falls outside of a zone boundary. The vendor and Borough project manager will determine a plan for how to deal with the no-data portions of the tiles so those areas can be displayed as transparent without affecting other valid data pixel values. • Acquisitions Conditions (pg. 2) - As outlined in the USGS specification and this SOW, the imagery shall ideally be leaf-off, ground snow-free (with some high elevation leniency), lakes ice-free. • Aerotriangulation (pg. 3)- Standards for aerial triangulation shall meet or exceed the standards outlined in sections 7.7 and 7.8 on page AS of the ASPRS Positional Accuracy Standards for Digital Geospatial Data Edition L Ver. 1, Nov 2014. • Datums and Coordinates (pg. 3) - NAD 83; Alaska State Plane Zone 4 Feet; NAVD88 shall be used. The Borough will provide the projection file that should be used so that our mapping system correctly recognizes the information.
