Why does 'Export' produce coordinates 15 decimal places long?

I matters because it is bogus precision that results from incompetent software "engineers" using floating point numbers instead of fixed decimal numbers.  Everything after the actual accuracy of the capturing GPS -- 4 or 5 digits -- is a lie that implies accuracy that does not exist.  It is just lazy programming but given all of BaseCamp, is that a surprise to anyone?

4 decimal places is about 11m (36 ft). You don't want roads (or anything) placed on maps with better accuracy?

The maps you use routinely place things with more accuracy than 4 or 5 places. Where does that come from?

There's no reason BaseCamp has to be limited to the accuracy of handheld GPS units. It's not like the accuracy of even handheld GPS units hasn't improved and might improve further still. But you are basically arguing that things like BaseCamp should be stuck supporting only the accuracy of old GPS units (at whatever number of fixed decimals that was "enough" for the old units).

And, even with all that, it doesn't matter at all (beyond the file size) that more decimal places are used.

6 digits is 4 inches of accuracy, far beyond what any consumer GPS can even provide.   You are confusing accuracy with precision.

My track points were recorded by an iPhone using GAIAGPS that saved 6 digits of precision, which likely was already greater than the device's accuracy. However, after I loaded that GPX file into BaseCamp, it bastardized every Latitude and Longitude to 15 digits -- an implied precision of sub-nanometer accuracy.  Everything past the original 6 digits is pure b*llsh*t. Having a 7th digit doesn't magically locate me at this specific centimeter when the best the GPS could originally say was I was somewhere in a 3 meter circle, No, those extra digits imply accuracy that is a lie.

A good software engineer would have known to not use floating point or they would have rounded to reasonable precision instead of the BS they wrote because they were sloppy, lazy, or uninformed (sad that someone at Garmin wouldn't understand such a simple thing).  There's a reason banks and financial institutions never use floating point when dealing with money.  The same is true here.  There are an infinite set of numbers that floating point numbers can never represent.  If you had a device that had 15 digits of accuracy, floating point would still be a complete failure because it can't accurately  represent every position at any level of precision.

(Deeply weird and pointless rant.)

1618013 said:

the GPS could originally say was I was somewhere in a 3 meter circle,

If you put a waypoint on a bench or a fountain on the map, using 4 (or 5 digits) could put it in quite a different location (far enough to be annoying).

1618013 said:

6 digits is 4 inches of accuracy, far beyond what any consumer GPS can even provide.

Why should the use of BaseCamp be limited to "consumer GPS" devices?

You wanted 4 (!!) or 5 digits (anything beyond that was "a lie"). Now, you want 6 digits?

It's likely any libraries being used support floating point. Using floating point (internally) might be faster. Fixed decimals is not common at all (it's typically restricted to using for money).

===========================

Again, the only place where it has an impact is the size of files. The larger number of digits could make reading/writing files a bit slower.

Given that Garmin mostly froze work on BaseCamp years ago, your rant is even more weird and pointless.