All spreadsheets are in OpenDocument format.

	SPREADSHEET FOR FIGURE 2.1
	Progress of the International Map of the World – number of sheets recorded, 1921–1986
	data from IMW annual reports
	SPREADSHEET FOR FIGURE 3.16
	Historical values of the size and shape of the earth – radius and flattening, 1617–1989
	data citations in spreadsheet
	SPREADSHEET FOR CHAPTERS 5 AND 6
	Radionavigation systems in the twentieth century – acronyms, sponsors, range, accuracy
	compiled by William Rankin
	SPREADSHEET FOR FIGURE 6.14
	Deployment of GPS satellites – launches and decommissioning, 1978–2010
	data from US Naval Observatory