Scores close to zero (colored in white) means a park has an average level of facilities and spaces for the activities. If a park has a positive score, its amenities for doing health-promoting activities is better than average. A negative score (colored in grey to black), on the other hand, means the park is lacking such amenities. It's important to note that each city's scores are adjusted relative that city. The scores don't allow for a comparison between parks in different cities.