Building Footprints (2022)

This hosted feature layer has been published in RI State Plane Feet NAD 83 (2011). RI_StatewideEnhancements_D24 project called for the planning, processing, and derivative products of lidar data that were collected at an aggregate nominal pulse spacing (ANPS) of 0.35 meters (8ppsm). Project specifications are based on the U.S. Geological Survey National Geospatial Program Lidar Base Specification, 2022 rev. A. The data was developed based on a horizontal projection/datum of NAD83 (2011), State Plane Coordinate System, Rhode Island, FIPS 3800, US Survey Feet vertical datum of NAVD88 (GEOID18). Lidar data was delivered as processed Classified LAS 1.4 files, formatted to individual 2500ft x 2500ft tiles,as tiled lazs. Building footprint data was delivered via file geodatabase.本托管要素图层采用罗德岛州平面英尺坐标系NAD83（2011）发布。RI_StatewideEnhancements_D24项目旨在开展激光雷达（lidar）数据的规划、处理及衍生产品生产，该类数据以聚合标称脉冲间距（aggregate nominal pulse spacing, ANPS）0.35米（每平方米8个脉冲，8ppsm）采集。本项目技术规范依据《美国地质调查局国家地理空间项目激光雷达基础规范2022年修订版A》制定。数据的基准信息如下：水平投影/基准为NAD83（2011）罗德岛州州平面坐标系、联邦信息处理标准3800（FIPS 3800），垂直基准为采用GEOID18模型的NAVD88美国测量英尺。激光雷达数据以处理完成的分类LAS 1.4格式文件交付，被封装为单幅2500英尺×2500英尺的分块LAZ文件。建筑轮廓数据通过文件地理数据库交付。