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- referral nearest by dist class: A table indicating which one of the selected "To" facilities is the closest by distance from each of the selected "From" facilities
- referral nearest by time class: A table indicating which one of the selected "To" facilities is the closest by travel time from each of the selected "From" facilities
- referral class: A table containing all pair-wise results, i.e. the distances and travelling times for each “From” - "To" pair
Parallel computation of the referral analysis
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