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Feedback on the New Datums

Feedback on the New Datums. US Army Corps of Engineers Jim Garster. 2015 Geospatial Summit April 13 to 14, 2015. Preparation. Our major products/services which will be affected by the new datums : Existing project maps; designs; studies Project O&M Manuals

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Feedback on the New Datums

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  1. Feedback on the New Datums US Army Corps of Engineers Jim Garster 2015 Geospatial Summit April 13 to 14, 2015

  2. Preparation • Our major products/services which will be affected by the new datums: • Existing project maps; designs; studies • Project O&M Manuals • Our preparations to date include: • Engineer Regulation (ER 1110-2-8160) Policy on project vertical datums • Engineer Manual (EM 1110-2-6056) Guidance referencing project datums • U-SMART (USACE Survey Monument Archival & Retrieval Tool) Keeps track of project control and ties to NSRS/NWLON • http://usmart.usace.army.mil US Army Corps of Engineers

  3. Advantages / Challenges • We are excited because...Expected advantages of the new datums for your organization, its products, or services • Consistency of vertical datums across the country • Better relationship between geodetic and hydrologic datums • Improved accuracy for GPS derived elevations • We are concerned because...Expected challenges of the new datums for your organization, its products, or services • Another vertical datum… • Relationship between exiting/older datums and new datum • Small changes might get ignored • Potential dynamic datum • Constantly changing coordinates • Conversion tools more complex US Army Corps of Engineers

  4. Transition Tools / Outreach Needs • The tools, products, or services we need most (from NGS or others) are: • NGS should publish transformation routines/tools • Need to include accuracy • User defined epoch for output datasheet • Command line application for transformations • Superseded values need to be documented • OPUS, connections to the NSRS • The outreach we need most (from NGS or others): • NGS should develop on-line tutorials on datums and importance of datum transformations. • publication which describes the differences between NAD83/NAVD88 and the new datums US Army Corps of Engineers

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