Decimal Vs Sexagesimal Notation for GeographicalLocation

["Richard Johnstone" <>]

If you need to have accuracy then you also need to record what datum you are 
using in obtaining the latitudes and longitudes. It makes a difference of 
about 200 metres if you are using WGS84 (almost exactly the same as GDA94)or 
AGD66. It appears that WGS84 is becoming the standard datum.
I collect seeds and plant specimens for my work and part of the recorded 
data for every collection is the datum, it is critical if that location is 
to be refound at a later date.
Our organisation (Botanic Gardens Trust, Sydney) uses sexagesimal notation, 
so that's what I record, but my GPS has both that and decimal on the 
readout, so it would be easy to record either.
Regards, Richard.