https://www.usa.gov/copyrighted-government-workshttps://www.rawpixel.com/image/440080Edit ImageSaveSaveEditCropCustom TextNASA scientists are flying over Alaska and Canada, measuring the elevation of rivers and lakes. Original from NASA. Digitally enhanced by rawpixel.MorePublic DomainFree CCO U.S. Government image for Personal and Business useInfoView CC0 LicenseJPEGTIFFSmall JPEG 1200 x 899 px | 300 dpiLarge JPEG 3500 x 2623 px | 300 dpiBest Quality JPEG 5000 x 3747 px | 300 dpiTIFF 5000 x 3747 px | 300 dpi | 107.24 MBFree DownloadNASA scientists are flying over Alaska and Canada, measuring the elevation of rivers and lakes. Original from NASA. Digitally enhanced by rawpixel.More