DGCR SSE stands for Scratch Scoring Estimate. This is what DGCourseReview estimates a scratch player (PDGA Player Rating of 1000) is estimated to typically score on this course (as it is currently set up in DGCR). For those unfamiliar with round ratings, another way of putting it is it's our guess as to what a pro might score on that course.
The SSE is calculated using course data from DGCR only. It calculates the SSE by assuming that a scratch player will throw on average 355' on lightly wooded holes, 285' on moderately wooded holes, and 255' on heavily wooded holes. It also assumes that it takes an average 1-2/3 throws to finish up the hole (putts and short range approaches).