Change Request
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Although CTs 10116-10118, 10119-10126 and 10421-10423 contain no significant error, these have been updated to be forward in time. It was decided that for reasons of clarity this would be through utilising deprecation and replacement.Open
Change Request Details
Change Id: 2023.074
Report Date: November 20, 2023
Date Closed: March 16, 2024
Reporter: IOGP
Request: Update Canada velocity grid and inter-CSRS transformation data.
Comment: Although CTs 10116-10118, 10119-10126 and 10421-10423 contain no significant error, these have been updated to be forward in time. It was decided that for reasons of clarity this would be through utilising deprecation and replacement.
Action: CR covers (a) changing Canada velocity grid method to reversible, (b) limiting extent to onshore, (c) updating inter-CSRS CTs using the v7 velocity grid, (d) updating inter-CGVD CTs using the v7 grid, (e) adding inter-CSRS CTs using the v6 velocity grid. (f) updating aliases. (g) correcting erroneous CT for British Columbia. Actions:- (a) For method 1070, changed reversibility to reversible, minor amendment to method formula and remarks to include biquadratic interpolation method, amended name and created alias of previous name. (b) Added extents 4752-4754 and scope 1288, amended scope 1056. For Point Motion Operation 8676 (v6 VG), amended usage and added second usage, amended remarks, added supersession trail. For point Motion Operation 9483 (v7 VG), amended extent code from 1061 to 4754, updated remarks. (c) Deprecated transformations 10119-10126 and 10421-10423 and added replacements 10522, 10524-10526, 10528, 10530, 10534, 10535 and 10537-10539. For method 1114, changed reversibility to reversible, corrected misleading name, formula description and example amended to clarify required application behaviour should use datum.anchor_epoch attribute. For datums 1193-1198 and 1365, added anchor epoch attribute data. (d) Deprecated transformations 10116-10118 and added replacements 10540-10542. (e) Added new transformations 10521, 10523, 10527, 10529 and 10536. (f) For transformations 10416, 10419, 10512 and 10513, amended ISO code alias. For transformation 10511, corrected variant from 1 to 3 [variants 1 and 2 prviously allocated] and amended name to match, amended operation accuracy and ISO code alias. For transformation 10514, amended operation accuracy and ISO code alias. (g) Deprecated transformation 9122 and added replacement 10615.
Tables Affected: Datum; Coordinate Operation Method; Scope; Coordinate Operation
Codes Affected: 1193 1194 1195 1196 1197 1198 1365; 1070 1114; 1056; 8676 9122 9483 10116 10117 10118 10119 10120 10121 10122 10123 10124 10125 10126 10416 10419 10421 10422 10423 10511 10512 10513 10514