Mapping a value to an interval

[JazonKuer]

What have you tried?

I've tried checking the steps/4 intervals on an incremental basis, including overlapping backwards and forwards into the neighbouring intervals, like:

baseCoord = coordinate // 10000*10000
remainder = round(coordinate/100)/10%10

if remainder <= 1.25:
   min = baseCoord - scale/2
elif remainder <= 3.75:
   min = baseCoord
elif remainder <= 6.25:
   min = baseCoord + scale/2
elif remainder <= 8.75:
   min = baseCoord
else:
   min = baseCoord*1.5

return [min, min+scale]

But I thought there must be a pure computational solution without the need for the conditionals, or what do you think? :-)