Recently, many researchers propose interpolation methods for PTV (Particle Tracking Velocimetry) data because the spatial distribution of physical quantities can not be directly obtained by PTV. These interpolation methods use mathematical or physical logic-based algorithms, and their accuracy are evaluated by several physical quantities. However, the evaluation methods are not generalized. In the present report, evaluation methods which use the equation of continuity and Navier-Stokes equation are discussed, and some post-processing methods proposed by authors are examined by the new evaluation methods.