This is why The Economist's Big Mac index which measures the purchasing power of the world's currencies is so hard to compile in Africa.
Technology capable of sounding and interpreting the earthy deeps has enabled them to compile, in five years, a body of knowledge that would have taken a lifetime's manual excavation of the Stonehenge site to complete.
After the changes of 1989, the new Hungarian Constitutional Court was quick to dismantle the old system in which the state could compile in one place huge amounts of personal information about individuals.
To get the most from their expertise, compile in advance two lists of places: those that you are determined to visit; and those that you would be keen to see so long as it doesn't add too much extra expense.
Exact statistics are difficult to compile, in part because IDPs may be cut off from international access and assistance or compelled to go into hiding because of threats to their life or safety.
Barry said the length of time taken by Chilcot compared badly with a first world war report on the failings of the Gallipoli campaign – which took six months to compile in the middle of the war – and more recently, the Winograd report on Israel's conduct of the 2006 Lebanon war.
