From dru.smith at noaa.gov Fri Jun 24 04:58:26 2016 From: dru.smith at noaa.gov (Dru Smith) Date: Fri, 24 Jun 2016 07:58:26 -0400 Subject: [IGSMAIL-7319] Invitation to submit abstract: AGU Session on Scientific and practical challenges of replacing NAD 83, NAVD 88 and IGLD 85 Message-ID: Colleagues, We draw your attention to AGU Fall Meeting session G019 titled "Scientific and practical challenges of replacing NAD 83, NAVD 88 and IGLD 85". This session is focuses on the very broad ranging set of issues surrounding all aspects of replacing (traditionally named) horizontal, vertical and dynamic height datums simultaneously, en masse. Just a few of the topics relevant to this session include: (1) defining a geocentric reference system fixed to a moving and deforming continent (2) defining a geoid-based, continental-wide vertical datum (3) implementing time dependencies including geoid change (4) creating accurate transformations between datums (5) defining the role of private RTK networks (6) determining dynamic heights from GPS without leveling (7) building geospatial databases capable of handling historic static data along with modern time-dependent data (8) collaborations with neighboring countries to ensure compatible and seamless reference systems across the continent. Submit your abstracts here: https://agu.confex.com/agu/fm16/preliminaryview.cgi/Session12899 Thank you, and we look forward to seeing you in San Francisco!