This study will examine how urban greenspace is related to health costs. Numerous of studies have documented the connection between urban and community forests and human health: in greener places, people are healthier. However, many of these studies lack spatial resolution and/or important covariate data that precludes definitive assessments. We will link LiDAR and other satellite data to characterize urban forest/greenspace in high spatial detail and link to the individual level health endpoints and costs within a large and diverse integrated health delivery system. We will also examine how greenspace is related to these outcomes with consideration of socioeconomic status and comorbidity.