Tree Health Aerial Survey GB 2012

Flights are undertaken by helicopter to identify areas of suspicious larch that require inspection, to target specific tree and plant health issues and to generally observe national tree, woodland and forest health. Flights are also used to check for compliance with Statutory Plant Health Notices Attribution statement: Contains OS data © Crown copyright [and database right] [year].

直升机执行飞行任务以识别需进行检视的疑似可疑落叶松区域，针对特定树木和植物健康问题进行定位，以及总体观测国家树木、林地和森林的健康状况。飞行任务亦用于核实是否符合法定植物健康公告。属性声明：包含 OS 数据 © 英国皇家版权[及数据库权利][年份]。