LiDAR 2018

LiDAR (Light Detection and Ranging) data collected in 2018 of the City of Vancouver and UBC Endowment Lands with an Area of Interest (AOI) covering a total of 134 square kilometers.​Data products include "bare earth" ground surface and of the upper most surface defined by vegetation cover, build​ings and other structures. Note ​​The 2018 LiDAR data is being utilized for initiatives including land management and planning including hazard assessment, floods, landslides, lava flows, and tsunamis), forestry, agriculture, geologic mapping, and watershed and river modelling and analysis. Data accessEach of the 181 polygons on the map or rows in the table provides corresponding link to the data in LAS format (zipped, file sizes range from 7KB to 950MB).AttributesPoint data was classified as:Unclassified;Bare-earth and low grass;Low vegetation (height <2m);High vegetation (height >2m);Water;Buildings; Other; andNoise (noise points, blunders, outliners, etc)​ Data currencyAerial LiDAR was acquired on August 27th and August 28th, 2018 and is ​current as of those dates.​ Data accuracyThe LiDAR data is positioned with an average density of 30 points per square metreSidelap: minimum of 60% in north-south and east-west directionsVertical accuracy: 0.18 metre (95% confidence level)Horizontal accuracy: 0.36 metre (95% confidence level Coordinate systemThe map of grid cells on this portal is in WGS 84 but the LiDAR data in the LAS files are in the following coordinate system: Projection: UTM Zone 10 (Central Meridian 123 West)Hz Datum: NAD 83 (CSRS) 4.0.0.BC.1.GVRDVertical Datum:  CGVD28GVRD Metro Vancouver Geoid (HTMVBC00_Abbbyn.zip) Websites for further information​City boundary dataset​

2018年采集的温哥华市及UBC捐赠地的激光雷达（LiDAR）数据，覆盖了共计134平方公里的关注区域。数据产品包括‘裸地’地表以及由植被覆盖、建筑和其他结构定义的最高地表。值得注意的是，2018年的LiDAR数据正被用于包括土地管理及规划（如灾害评估、洪水、滑坡、熔岩流和海啸）、林业、农业、地质测绘、流域及河流建模与分析等众多领域的项目。数据访问：地图上的181个多边形或表格中的行均提供了对应数据的链接，数据格式为LAS（压缩格式，文件大小介于7KB至950MB之间）。属性：点数据被分类为：未分类；裸地及低矮植被；低植被（高度小于2米）；高植被（高度大于2米）；水域；建筑；其他；以及噪声（噪声点、错误、异常等）。数据时效性：空中激光雷达数据于2018年8月27日和28日获取，截至这些日期均为最新。数据精度：LiDAR数据的定位平均密度为每平方米30个点，南北和东西方向的侧视重叠至少为60%，垂直精度为0.18米（95%置信水平），水平精度为0.36米（95%置信水平）。坐标系：本门户的网格单元地图采用WGS 84坐标系，但LAS文件中的激光雷达数据采用以下坐标系：投影：UTM第10区（中央子午线123西），Hz基准：NAD 83（CSRS）4.0.0.BC.1.GVRD，垂直基准：CGVD28GVRD，大温哥华地区大地水准面（HTMVBC00_Abbbyn.zip）。更多信息网站：城市边界数据集。

搜集汇总

背景与挑战

背景概述

LiDAR 2018数据集包含2018年采集的温哥华市及UBC捐赠地的激光雷达数据，覆盖面积134平方公里，提供裸地和最上层表面的数据产品，适用于土地管理、灾害评估和林业等多个领域。数据具有高精度，垂直和水平精度分别为0.18米和0.36米，采用UTM Zone 10坐标系统。