Interferometric Synthetic Aperture Radar (IFSAR) Alaska

The U.S. Geological Survey (USGS) National Geospatial Program (NGP) developed the Alaska Mapping Initiative (AMI) to collaborate with the State and other Federal partners to acquire 3-dimensional elevation data to improve statewide topographic maps for Alaska. AMI coordinates Federal activities through the Alaska Mapping Executive Committee (AMEC) and State efforts through Alaska's Statewide Digital Mapping Initiative (SDMI) to ensure a unified approach for consistent data acquisition and enhancement of elevation data products. AMI attained interferometric synthetic aperture radar (IFSAR) to generate digital elevation model (DEM) data. This radar mapping technology is an effective tool for collecting data in challenging circumstances such as cloud cover, extreme weather conditions, rugged terrain, and remote locations. Airborne IFSAR data were flown over South Central Alaska in the summer of 2010 and over Northwest Alaska in 2012.

美国地质调查局（U.S. Geological Survey, USGS）国家地理空间项目（National Geospatial Program, NGP）发起了阿拉斯加测绘倡议（Alaska Mapping Initiative, AMI），旨在联合阿拉斯加州政府及其他联邦合作伙伴采集三维高程数据，以优化阿拉斯加州全境的地形图。AMI通过阿拉斯加测绘执行委员会（Alaska Mapping Executive Committee, AMEC）统筹联邦层面的测绘活动，通过阿拉斯加州全州数字测绘倡议（Statewide Digital Mapping Initiative, SDMI）协调州级工作，确保采用统一方案实现标准化的数据采集，并优化高程数据产品。AMI应用干涉合成孔径雷达（interferometric synthetic aperture radar, IFSAR）技术生成数字高程模型（digital elevation model, DEM）数据。该雷达测绘技术在多云覆盖、极端天气、崎岖地形及偏远区域等复杂场景中，是高效的数据采集工具。2010年夏季，机载IFSAR数据采集作业覆盖阿拉斯加中南部地区；2012年，该作业覆盖阿拉斯加西北部地区。