More precise matching method

[archaeothommy]

Original idea by @kjwestner:
Matching should be carried out with a buffer zone (e. g. 0.1 % or something similar to the typical analytical error) on every single data point of the uploaded data instead of matching for min/max values. This would significantly enhance the precision of the matched data, especially for widely scattered uploaded data.
Matching data should also be displayed on the level of mining sites instead of provinces/mining areas.