https://cdn.earthdata.nasa.gov/conduit/upload/5182/KeywordsCommunityGuide_Baseline_v1_SIGNED_FINAL.pdf 23.7 2026-04-15T10:53:30.610Z https://gcmd.earthdata.nasa.gov/KeywordViewer/scheme/sciencekeywords/07a856fd-75e2-46e8-91eb-8a8562d3452f BOUNDARIES Date=2012-07-10 User Id=tbs1979 Entity=Definition Operation=UPDATE Field=text System Note=update Definition Old Value=Any human construction (material or otherwise) that fixes a limit or extent. New Value=Any human construction (material or otherwise) that fixes a limit or extent. Date=2012-07-10 User Id=tbs1979 Entity=Definition Operation=UPDATE Field=reference System Note=update Definition Old Value="http://www.Dictionary.com" New Value=http://www.Dictionary.com Date=2012-07-10 User Id=tbs1979 Entity=Definition Operation=UPDATE Field=reference System Note=update Definition Old Value="http://www.Dictionary.com" New Value="http://www.Dictionary.com" Date=2025-08-12 User Id=system System Note=Added narrower relation from BOUNDARIES [07a856fd-75e2-46e8-91eb-8a8562d3452f] to BOUNDARY ENCROACHMENT [1f908d8e-3a7f-4f1c-ade0-884b7cc2f23a] Any human construction (material or otherwise) that fixes a limit or extent. 2012-07-10 15:43:33.0