[trapperkeeper74]

Good GPS receivers allowed changes to datums. Furthermore, there is a transformation possible between ellipsoids if you have their exact parameters.

Source: I worked at Trimble.

[thisrod]

I agree. How is this different from all the other failures caused by false assumptions about map datums? (And why aren't those just another case of bad metadata, comparable to character encoding issues?)

Edit, read the rest of the article to put the linked section into context. The commies are trying to obfuscate a map grid? That's just nutty. Are they really going to arrest everyone who is found in possession of a magnetised needle?