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Clarify swath polygon requirements

By NGP Standards and Specifications

This revision cleans up and clarifies the language for the swath polygon requirement. 

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Current requirement:

In LBS 2022 rev. A: Deliverables: Metadata: 
  • A georeferenced, polygonal representation of the detailed extents of each lidar swath collected, as a GIS layer. The goal is a set of polygons that define the area actually covered by the swaths, not merely the points collected in the swaths.
    • The extents shall be those of the actual coverage of the collected swath, exclusive of peripheral TIN artifacts:
      • Minimum bounding rectangles or simplified rectangles are not acceptable.
      • The boundary will generally follow the overall shape of the swath. 
The entire section above to be replaced with:
  • A georeferenced, polygonal representation of the detailed extents of each lidar swath collected, as a GIS layer. 
    • The extents shall represent coverage of the collected flight line swath. 
    • Minimum bounding rectangles are not acceptable. 
    • The boundary will generally follow the overall shape of the swath and shall not be fragmented except in areas where voids are permitted (for example, where caused by waterbodies). 
    • Swath polygon feature shall not include extents of data collected during aircraft transit to or from project area or in turns between flight lines.