Yes, as Tinker said, it's 2*2 and 100*100 meters respectively (and thus there are 50*50 zoomed in tiles in each world tile).
Also note that UrW uses the unusual system of rounding announced measurements upwards, so an item in your inventory can weigh 1.1 pounds but is displayed as 2 (which is why making 10 bandages can require many more items than you'd think to make if the source items are displayed as weighing 2 each). Similarly, distances are rounded up, so "4 km away" means 3.1 - 4.0 km (i.e. 31-40 world tiles).
Also, information about nearby villages/caves/lakes doesn't even seem to use that system. At least when you ask about things further away I believe it is always described as 20 km (quest directions use the system above).
Directions have a low resolution, being limited to N, NE, E, SE, S, SW, W, and NW (I wouldn't mind twice the resolution, i.e. N, NEN, NE, ENE, etc.).
And yes, it's somewhat odd to mix metric and more archaic measurements, but it doesn't really matter as it's just numbers with given relations between them (and there's no reasonable relation between the inch/foot/yard measurements and the larger one, i.e. English (or nautical) mile which would make world tiles and overland distances awkward to relate).