4795 published compressor maps — AHRI 540 ten-coefficient polynomials from the manufacturers' own selection data — evaluated at the evaporating and condensing temperatures you name.
A compressor's published map answers capacity and power at a saturated evaporating and condensing temperature pair — the two numbers a circuit settles on. A selection is a point on it; a system is where the coil, the condenser and the map agree, which is what the builder solves. How a machine meets a part load is the next question.