Revision History for SIR 2016–5009 Robert H. Flynn, Paul H. Rydlund, and Daniel J. Martin Network Global Navigation Satellite System Surveys to Harmonize American and Canadian Datum for the Lake Champlain Basin ----------------------------------------------------- Posted online March 8, 2016 ----------------------------------------------------- Revised and reposted April 1, 2016, version 1.1 The text was modified on page 4, paragraph 2. Changed "established Lake Champlain near Grande Isle, Vt., lake gage 04294620, the U.S. lake gages" to "established lake gage 04294620 (Lake Champlain near Grande Isle, Vt.), the U.S. lake gages" The text was modified on page 7, paragraph 3. Changed "calculated using by GEOID12A" to "calculated by using GEOID12A" Table 2 was modified on page 7. Deleted "OPUS" in fourth column heading. Changed "WGS 84" to "NAD 83" in fourth column heading. Deleted "The WGS 84 is part of" in footnote 1.