Operational research of airborne topo-bathymetric lidar

由于海洋测量船航行的危险以及传统的地形激光雷达测量无法穿透水柱，沿海地区的水深测量经常丢失浅水区的数据。海岸地图上缺乏海拔信息通常被称为“白色带缺口“，这对在沿海地区开展业务的研究人员和商业团体构成了独特的挑战。新斯科舍省社区学院内的应用地理信息学研究组（AGRG）最近获得了AHAB Chiroptera 2地形-测深（地形-水深）激光雷达系统，该系统能够无缝测量陆地地形和浅水测深，以消除淡水和沿海环境中的这一差距。AGRG将与Leading Edge Geomatics（LEG）合作，LEG是一家成熟的遥感测绘公司，专门从事数字航空摄影和地形激光雷达采集，研究使用这种新设备测量沿海地区的最有效方法，并制作具有商业价值的地图。该项目将涉及在诺森伯兰海峡、大西洋海岸和芬迪湾进行航空调查，在诺森伯兰海峡，贝类捕捞量很大，在芬迪湾，油轮运输量预计会增加，沿海地区有各种商业渔业的自然生境（海胆、海带），并有环境敏感的海岸线，如作为盐沼泽。这项新技术还将支持小型船只港口绘制航道图，以确保安全航行，并确定可能需要疏浚的区域，以及绘制水下海藻和生态敏感植物的地图。

Bathymetric surveys in coastal zones are often missing data in shallow water areas due to the danger tonavigation for marine survey vessels and the inability of traditional topographic lidar surveys to penetrate thewater column. The lack of elevation information on coastal maps is often referred to as the "white ribbon gap"and poses unique challenges to researchers and commercial groups operating within the coastal zone. TheApplied Geomatics Research Group (AGRG) within the Nova Scotia Community College has recentlyacquired an AHAB Chiroptera 2 topographic-bathymetric (topo-bathy) lidar system capable of seamlesslymeasuring the land topography and shallow water bathymetry to eliminate this gap in freshwater and coastalenvironments. AGRG will partner with Leading Edge Geomatics (LEG), an established remote sensingmapping firm that specializes in digital aerial photography and topographic lidar acquisition, to research themost efficient method to use this new equipment to survey the coastal zone and produce maps that are ofcommercial value. The project will involve aerial surveys in the Northumberland Strait where shellfishaquaculture is prominent, the Atlantic Ocean coast and the Bay of Fundy where tanker traffic is expected toincrease and the coastal area supports a variety of natural habitats for the commercial fishery (sea urchins, kelpbeds), and host environmentally sensitive coastlines such as salt marshes. This new technology will alsosupport small craft harbours to map channels for safe navigation and identify areas that may require dredging aswell as mapping the submerged seaweed and ecologically sensitive plants.