This study evaluates the effectiveness of top-of-atmosphere radiance (TOAR) and atmospherically corrected surface reflectance (SR) data in detecting vegetation cover changes in Acadia National Park. Using PlanetScope data, we applied NDVI and ARVI for change detection. Modified ARVI indices from SR data, with controlled red or blue bands, showed the highest accuracy (87.58% and 89.44%). The results suggest SR data provides better insights for monitoring vegetation dynamics in protected areas.