High-resolution orthoimagery of the Altamaha River estuary in November 2017 and October 2018

We acquired two high-resolution (0.15-m per pixel) color digital images of the salinity gradient of the Altamaha River estuary in November 2017 (1 month after Hurricane Irma) and October 2018. Flights ranged from the mouth of the estuary all the way up to the tidal fresh forest habitat. The 1:1200 scale orthoimagery is comprised of 4-bands (Red, Green, Blue, Near Infrarad (RGBNIR)) collected with a Ground Sample Distance (GSD) of 0.5 foot using a Leica ADS100 airborne digital sensor. Individual tiles were georectified using ground control points and merged into a domain-wide mosaic.

本研究于2017年11月（飓风艾玛（Hurricane Irma）过境1个月后）与2018年10月，获取了两组分辨率为每像素0.15米的阿尔塔马哈河（Altamaha River）河口盐度梯度彩色数字影像。影像采集飞行范围覆盖从河口直至潮汐淡水森林栖息地的全域区域。本次采集的1:1200比例尺正射影像（orthoimagery）包含红、绿、蓝、近红外（RGBNIR，Near Infrarad）共4个波段，采用徕卡ADS100机载数字传感器获取，地面采样距离（Ground Sample Distance, GSD）为0.5英尺。所有独立影像瓦片均通过地面控制点（ground control points）完成地理校正，并最终拼接为全域镶嵌图。