|In Civil Engineering, Station or STA is assigned by the design engineer on a street, a flood control channel or a storm drain (SD), etc. For instance, for a local street which intersects at a collector street at STA 10+00 and continues to STA 100+00, therefore the distance between the stations is 10,000 - 1,000 = 9,000 LF or the street is 9,000 feet or 1.7 mile long.|
Even though A1 displays as 40+49.52, its value is 4,049.52
and 40+97.52 has a value of 4,097.52. Hence, the distance between the locations in A1 & B1 is 4,097.52 - 4,049.52 = 48 LF
I hope that helps!