... the Reflecting Pool, and massive oaks of Lafayette Park, there are 4,839 acres of general tree cover in the city’s 7,999 acres of parkland. Their aesthetic value is not countable, but the value ... continues; in the interim we have chosen to assign the conserva-tive value of 5 percent as the amount that parkland adds to the assessed value of all dwellings within 500 feet of parks. (The preponderance ... course, the direct use value of the public course would be $60. Under the theory that the second and third repetitions of a park use in a given period are slightly less valuable than the first...