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Using Authoritative Georeferenced Digital GLO Plats with Any Vector Grid Database for Lease Mapping

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Louise White, Partner, WhiteStar Corporation.
Discusses the utility of Georeferenced source documents to validate lease polygons.

Published in: Technology
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Using Authoritative Georeferenced Digital GLO Plats with Any Vector Grid Database for Lease Mapping

  1. 1. Using Authoritative Georeferenced Digital GLO Plats with Any Vector Grid Database for Lease Mapping Louise White Partner WhiteStar Corp
  2. 2. Preview • The need for mapping public lands • Origin of the USPLSS • Surveying Federal Land • The original GIS – Plat maps • Relevance of Historical Documents • What has WhiteStar been up to • Questions
  3. 3. Western Expansion… 1783 – Revolutionary war ends 1785 – Land Ordinance Act 1803 – Louisiana Purchase… U.S. Doubled size in 20 years Lots and lots of Federal Land!
  4. 4. Survey before Sale…
  5. 5. Origin of the Public Land Survey 1785 – Land Ordinance Act The Northwest Territory was to be subdivided into "townships of six miles square, by lines running due north and south, and others crossing these at right angles…” Located at a point on the Ohio – Pennsylvania border between East Liverpool, OH and Ohioville, PA
  6. 6. Origin of the Public Land Survey • 6 X 6 Miles Square • 1 Section = 640 Acres • Lots: Corrections along the North and West sides
  7. 7. Origin of the Public Land Survey Subsection: 40 Acre Aliquot Parts
  8. 8. Example: Kansas 6th Principal Meridian 18S 7E Section 1
  9. 9. Example: Colorado 6th Principal Meridian 9S 89W Section 21
  10. 10. Example: Louisiana Louisiana Meridian 3S 8E Section 24
  11. 11. Surveying Federal Land • Cadastral Survey – Creates, marks, defines, retraces or re-establishes the boundaries and subdivisions of Federal Lands of the United States • Survey Plat – The graphic drawing of the boundaries involved with a particular survey project. – Contains the official acreage to be used in the legal description
  12. 12. Types of Surveys • Original – A cadastral survey which creates land boundaries and marks them for the first time. • Dependent Resurvey – A resurvey for accomplishing a restoration based on the original condition according to the records. The dependent resurvey is made first by identifying existing corners and other recognized and acceptable points of control of the original survey • Many additional survey types
  13. 13. GLO Survey Plat Original Survey Oklahoma 5N 4W Indian Meridian 11/2/1871
  14. 14. 9N 4W Indian Meridian Sec 23 Original Survey: 11-2-1871
  15. 15. 9N 4W Indian Meridian Sec 23 Dependent Resurvey and Subdivision of Sections: 4-12-2005
  16. 16. Why are GLO Plats Relevant? • GLO Survey Plats provide the official acreage for legal descriptions… • Section subdivisions matter and they are not all the same size • Regardless of the source PLS, you can load the Historical Source Documents in your GIS system and glean valuable information
  17. 17. WhiteStar Plats • Locate the survey plats • Georeference • Logical naming convention
  18. 18. Example: Arkansas 10S 25W 5th Principal Meridian Original Survey Never Approved Started January 1819 • PLSS Survey • Georeferenced Plat Image
  19. 19. Example: Arkansas 10S 25W 5th Principal Meridian Subdivision of Sections Survey Approved: 8/16/1836
  20. 20. Example: Arkansas 10S 25W 5th Principal Meridian Other Survey Approved: 6/24/1858
  21. 21. WhiteStar Plats • Coverage Increasing • Oklahoma Complete • On Deck: • Arkansas • California • Michigan • Alabama • Florida
  22. 22. WhiteStar Plats - Delivery • WhiteStar Cloud • ArcGIS Pro Application • Streaming
  23. 23. Summary • The need for mapping public lands • Origin of the USPLSS • Surveying Federal Land • The original GIS – Plat maps • Relevance of Historical Documents • What has WhiteStar been up to
  24. 24. Questions? www.whitestar.com lwhite@whitestar.com

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