Geospatial Summit Feedback and Transition Needs for US Army Corps of Engineers
Feedback and preparation for the new datums discussed at the 2015 Geospatial Summit by US Army Corps of Engineers, highlighting advantages, challenges, and transition tools and outreach needs for the organization. Emphasis is placed on the importance of vertical datums consistency, relationship improvements, and accuracy enhancements, along with the concerns related to multiple datums and complex conversion tools. The organization seeks necessary tools and outreach from NGS for smooth transition and adaptation to the new datums.
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Presentation Transcript
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 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
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
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Need to include accuracy User defined epoch for output datasheet Command line application for transformations Superseded values need to be documented OPUS, connections to the NSRS The outreach we need most (from NGS or others): NGS should develop on-line tutorials on datums and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
