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The use of global positioning systems (GPS) has increased in recent years, including for urban forestry management, as a result of its wide range of applications, ease of use and direct use of GPS data in geographic information systems. This study was conducted in an urban green space to assess the accuracy and precision of two consumer-grade GPS receivers with regard to ground control point (GCP) coordinates. Eleven fixed GCPs with known positions were selected and their data collected on four days (two seasons) and three different daytime periods (08:00, 11:00 and 14:00) each day. For each treatment (season and daytime) five replications were recorded. The results showed that the best mean position accuracies were provided by the Colorado receiver in leaf-off period (4–5 m), and its corresponding position accuracies for summer ranged from 9 to 12 m. The results of the Rino receiver mean position error in summer (19–36 m) and winter (10–26 m) were higher than reported in literature. Point averaging had a...