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Node History: TP 1087 (331829060)
Version #6
Moving CA-US border to average NAD27 transformed by NADCON 4.2 and NTv2, then to ITRS2020, to avoid systematic bias in NADCON 5.0. Turning Points 1073-1089.
- Edited by revent
- Changeset #144778416
- Location: 45.1459130, -67.1448912
Tags
datum:horizontal | ITRF 2020 |
---|---|
datum:horizontal:epoch | 2015.0 |
note | Do not tag as a survey_point, since no physical object exists at location. Coordinates transformed from NAD 27 to average of NADCON 4.2 and NTv2 NAD83(1986), then to ITRF2020@2015.0 with NOAA VDatum 4.6.1. |
ref | TP 1087 |
source | CA-US International Boundary Commission |
Version #5
explicity state the specific coordinate system and epoch
- Edited by revent
- Changeset #144565915
- Location: 45.1459148, -67.1448848
Tags
datum:horizontal | ITRF 2020 |
---|---|
datum:horizontal:epoch | 2015.0 |
note | Do not tag as a survey_point, since no physical object exists at location. Coordinates transformed from NAD 27 to NAD 83(2011) with NGS NCAT 2.1, then to WGS84 (G2139) with NOAA VDatum 4.6.1. |
ref | TP 1087 |
source | CA-US International Boundary Commission |
Version #4
More accurate CA-US boundary along St. Croix River, using coordinates transformed to WGS84 instead of previous NAD 83 ones. Map Sheet A-14.
- Edited by revent
- Changeset #143979086
- Location: 45.1459148, -67.1448848
Tags
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