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georef [2021/03/10 12:19]
allchin09 [Coordinate Conversion]
georef [2021/03/10 13:31] (current)
allchin09 [Coordinate Conversion]
Line 131: Line 131:
 | scale factor   | 1                          | | scale factor   | 1                          |
  
 +
 +On these maps, Sydney Observatory was used as a datum for triangulation, with the following values:
 +^Format ^Latitude          ^Longitude         ^
 +|DMS    |S 33d 51m 41.10s  |E 151d 12m 17.85s |
 +|DD     |S 33.861417d      |E 151.204958d     |
 +
 +The [[http://www.ga.gov.au/ngrs/imf.jsp?site=ngrs|NGDB]] provides the following values of the observatory in different datums:
 +^Datum  ^Latitude            ^Longitude           ^Easting       ^Northing   ^
 +|Clarke |S33°51' 41.107"     |E151°12' 17.993"    |420746.19     |816789.65  |
 +|AGD66  |S33°51' 40.2924"    |E151°12' 12.3136"   |333809.38     |6251769.51 |
 +|AGD84  |S33°51' 40.3241"    |E151°12' 12.2557"   |333807.91     |6251768.51 |
 +|GDA94  |S33°51' 34.610232"  |E151°12' 16.470597" |333913.76     |6251959.42 |
  
 Note: Note:
georef.1615378744.txt.gz · Last modified: 2021/03/10 12:19 by allchin09