Maybe some country in North Africa, that is mainly desert?
If you did allow river crossings, maybe Russia or Canada? There's a whole lot of empty space in Siberia and northern Canada.
Maybe you could do it in an airplane. Compensate for the curvature of the Earth by varying your altitude. This will probably work up to a distance of a few hundred miles.
Spot where the actual map is supposed to be is just empty.
My problem with is, a margin of error of 25 meters for a run of less than a km isnt what I would call platinum, my gripe here is with geowizard. I feel the error margin should increase for each km, for example by one meter. So a straight line across a continent allows for a larger margin of error, but 1km , well you better stick to the line.
I know noone will read this but I had to let it out.
Its not coming form a bad place I just want better rules!
I'm sure that some sensible (albeit still arbitrary) geometric rule could be invented, such as requiring that the line bisects the country into two regions which have areas that differ by at most 50%, for example.
Alternatively, or additionally, the length of the line could be required to be greater than some specific fraction of the country's total border/coastline (assuming that has a rigorous definition).
For countries composed of multiple islands (or a mainland with some islands), the rules should probably require that the line pass through the biggest island / mainland, but perhaps multiple islands would need to be crossed (on the same straight line?) in order to meet the "bisecting area" rule above.
This includes the right to forage (berries, mushroom, whatnot). Though hunting and fishing can be quite restricted. Motorized vehicles have their own set of restrictions, but trekking, biking, sailing, etc are fine.
So, one cannot for instance fence off the access to nature, like a "private" beach etc. And camping is allowed everywhere not within 150m of a house/cabin with residents up to two days, though relocating to somewhere else would be fine. Farmland is again an exception, and you should ask the owner for permission.
PS: There are local exceptions everywhere, so be sure to check that. Some waters are protected, etc. Some regions are considered "protected nature", which doesn't trump "allemannsretten" (the aforementioned rights), but there can be other restrictions. And in all cases, it is expected to not leave behind garbage or cause damage.
[0]: https://lovdata.no/dokument/NL/lov/1957-06-28-16 (In Norwegian)
Australia though? I suppose you could count the northern tip of Queensland, but it doesn't seem very "across".
I was thinking of saying Norway and New Zealand look OK because in both cases you start on the eastern border/coast and finish on the western one, unlike Queensland where you are still in the northeast by any definition. This gets close to my intent, but to make this work we have to accept that NZ has multiple east coasts, or a single discontinuous one. Why is it OK to cross the North Island in NZ, but not OK to cross some tiny island in Australia (e.g. cross King Island [1] from west to east)?
[0] https://imgur.com/gallery/gistDx1 [1] https://goo.gl/maps/Q5JEN1j3U4sBMEvf6
Not sure what's so strange about having two coasts if you've already accepted that New Zealand is composed of at least two important islands.
It would be cool for the OP to upload his line to this site and see some other metrics: https://www.scoremyline.com/