Launched in September 2018, ICESat-2 (Ice, Cloud, and land Elevation Satellite-2) has just begun making its first data available. The data map global terrain surface and forest canopies. The Advanced Topographic Laser Altimeter System (ATLAS) instrument on-board ICESat-2 utilizes photon counting technology for the altimetry observations. Photon counting technology is relatively new to the vegetation mapping community. Data from ICESat-2 will provide global terrain elevation and canopy height estimates as well as showing potential for estimation of forest biomass.