Strength of schedule is calculated from the opponents projected fantasy points allowed for the PK position. The best rating is +16 which gives the player the advantage against the defense and indicates an easy opponent, the worst rating is -16 which gives the defense the advantage and indicates a tough opponent.
It is still difficult to picture Phil Dawson in a 49ers uniform after he spent 14 season with the Cleveland Browns. He had a lot of success in his first season with the 49ers, but did not find as many opportunities last year. The offense had its struggles and they may continue in 2015. Do not expect him to come close to the 44 extra points that he made in 2013, but his field goal rate should improve after making just 80% of his kicks last year.