Impervious Surfaces 2018

TLCGIS regularly uses digital orthophotos and planimetric/hydrographic/topographic data to support regulatory functions, land management and acquisition, planning, engineering and habitat restoration projects. This dataset is part of a regularly scheduled update of LiDAR and digital orthophotography products. The dataset was created from source imagery acquired by a Trimble TAC80 natural color digital camera and LAS data acquired by a Optech ALTM HA500 (Pegasus) LIDAR sensor from January 18, 2015 to February 5, 2015. The dataset was updated using source imagery acquired by a LEICA ADS100 digital mapping camera on January 30-31, 2018, and an LAS dataset acquired by a LEICA ALS80 HP LiDAR system from February 5 through April 25, 2018.TLCGIS 定期采用数字正射影像及平面、水文、地形数据，为监管履职、土地管理与征购、规划设计、工程实施及生境修复类项目提供支撑。本数据集属于激光雷达（LiDAR）与数字正射影像产品的定期更新计划的组成部分。该数据集的初始数据由2015年1月18日至2月5日期间，天宝（Trimble）TAC80自然色彩数码相机采集的源影像，以及奥普特克（Optech）ALTM HA500（Pegasus）激光雷达（LiDAR）传感器采集的LAS数据生成。后续，该数据集的更新工作依托2018年1月30日至31日由徕卡（LEICA）ADS100数字测绘相机采集的源影像，以及2018年2月5日至4月25日由徕卡（LEICA）ALS80 HP激光雷达（LiDAR）系统获取的LAS数据集完成。