SP1 - the Inter-Governmental Advisory Committee on Surveying and Mapping (ICSM) publication - Standards and Practices for Control Surveys (SP1).
Geodesy and GPS (Geoscience Australia) - the definitive source for a National perspective on Geodesy, GPS and related activities.
AUSPOS - Geoscience Australia's online GPS processing service.
Exploring GPS (PDF 2.8 MB) - LPI's (formerly the Department of Lands) own widely acclaimed easy-to-read publication about GPS. It's free!
MapTools - a user-friendly site for understanding coordinate systems.
ICSM Fundamentals of Mapping - a comprehensive general overview to maps and the mapping process - with particular regard to Australia and New Zealand.
AUSGeoid - all you need to know about the latest Australian Geoid model.
ITRF - the International Terrestrial Reference Frame.
AGRF - find out the current magnetic declination at any location using the Australian Geomagnetic Referenece Field online calculator.
NIS - the Navigation Information Service operated by the US Coast Guard as a point of contact for civil GPS users.
NGS Antenna Calibrations - National Geodetic Survey GPS antenna calibration site - United States of America.