Hawaii Hamakua IKONOS and Quickbird Imagery - Mosaic

This project is a cooperative effort between the National Ocean Service, National Centers for Coastal Ocean Science, Center for Coastal Monitoring and Assessment, BAE Systems Spectral Solutions LLC, and Analytical Laboratories of Hawaii, LLC. IKONOS and Quickbird imagery was purchased to support the Pacific Islands Geographic Information System (GIS) project and the National Ocean Service's (NOS) coral mapping activities. One-meter panchromatic and four-meter multi-spectral data were purchased for each study area. The enhanced spectral resolution of multispectral imagery and control of bandwidths of multispectral data yield an advantage over color aerial photography particularly when coral health and time series analysis of coral reef community structure are of interest. The IKONOS and Quickbird imagery was processed to minimize atmospheric and water column effects. Photointerpreters can accurately and reliably delineate boundaries of features in the imagery as they appear on the computer monitor using a software interface such as the Habitat Digitizer.

本项目由国家海洋服务局（National Ocean Service，NOS）、海岸海洋科学国家中心（National Centers for Coastal Ocean Science）、海岸监测与评估中心（Center for Coastal Monitoring and Assessment）、BAE系统光谱解决方案有限责任公司（BAE Systems Spectral Solutions LLC）以及夏威夷分析实验室有限责任公司（Analytical Laboratories of Hawaii, LLC）联合开展。研究团队采购IKONOS与Quickbird影像，用于支撑太平洋岛屿地理信息系统（Geographic Information System，简称GIS）项目及国家海洋服务局（NOS）的珊瑚制图工作。每个研究区域均配套采购了1米分辨率全色波段数据与4米分辨率多光谱数据。多光谱影像具备更优异的光谱分辨率，且可对其波段带宽进行精准调控，相较彩色航空摄影具备显著优势，尤其在关注珊瑚健康状况与珊瑚礁群落结构的时间序列分析场景中，优势更为突出。研究人员对IKONOS与Quickbird影像进行了预处理，以最大限度削弱大气效应与水柱效应的干扰。影像解译人员可通过Habitat Digitizer等软件界面，在计算机显示器上精准且可靠地勾勒出影像中各类地物的边界。