Surveying, GPS, Digitization - A Primer of GIS: Fundamental Geographic and Cartographic Concepts - page 152

More on the surveying of the United States is available online at www.

measuringamerica.com/home.php

An excellent starting point for resources on the history of surveying is available
online at www.fig.net/hsm/

An overview of geodesy and its different uses is available online at www.ngs.noaa.gov/
PUBS_LIB/Geodesy4Layman/toc.htm

A very thorough overview of the GPS system focusing on technical aspects is available
online at http://en.wikipedia.org/wiki/GPS

Trimble, a large GPS hardware and software provider, offers an animated GPS tuto-
rial is available online at www.trimble.com/gps/index.html

An overview and details about the roles of GPS for aeronautics (and beyond aviation)
is available online at http://gps.faa.gov/index.htm

For information related to European GNSS activities, see www.esa.int/esaNA/

index.html

The American Congress of Surveying and Mapping (ACSM) offers much information
about current surveying training and activities online at www.acsm.net/