Impervious Surface Land Connecticut 2023

This dataset contains statewide impervious surface vector features for the State of Connecticut. The dataset was developed from 2023 source imagery to provide a high-resolution, consistent geospatial representation of impervious land cover. The impervious surface component includes mapped features such as buildings, roads, driveways, parking areas, sidewalks, pavement, swimming pools, paved recreation surfaces, and bridges. Feature capture and attribution were performed according to defined class-specific interpretation and minimum mapping specifications. The dataset is intended to support statewide mapping, infrastructure planning, land cover assessment, hydrologic and stormwater analysis, emergency management, and other GIS-based applications. This dataset package contains three feature files. The Land file is a polygon dataset in which each feature contains the fields FID (unique identifier), Shape (geometry), and CateTitle (feature classification). CateTitle values and their definitions are all provided in the Entity and Attribute Information section of this metadata record Class Definition Road Edge of roadway, including curbs. In the case where roads overlap or where they are elevated from the ground, the elevated/overlapping surface(s) are classified as bridges, and the terrain surface is classified as road. Roads are greater than 8 feet wide and 50 feet long. Sidewalk A paved path for pedestrians, typically running parallel to a street. Private sidewalks include sidewalks outside the right of way of public property, for example, a sidewalk that leads from the edge of a driveway up to the front door of a house. Public sidewalks are defined as those that typically reside within the public right of way, parallel to a street. Sidewalks take priority to driveway, or other paved surface, in the landcover feature classifications. Sidewalks are greater than 3 feet wide and 10 feet long. Pavement Any paved surface that does not fall into the specific impervious feature classifications. As with other features, must be greater than 100 square feet. Driveway Paved surface from edge of curb to structure. In cases where sidewalk is overlapping, sidewalk takes priority. Greater than 8 feet wide and 10 feet long. Parking Paved surface with visible parking lanes. Greater than 500 square feet. Building The geometric footprint of each building greater than 100 square feet. Buildings are derived from the roofline and the wall facade to correctly interpret where a structures foundation meets the ground. Buildings are based on the 2D lidar-derived building footprints, a deliverable of the 2023 state flight. Bridge Driving surfaces that are elevated from terrain level. Does not include walking paths. Bridges are greater than 8 feet wide and 50 feet long. Swimming Pool Sub-surface open water on residential or commercial property that is clearly not a natural body of water. Swimming pools must be greater than 100 square feet Sports Fields Paved Any paved recreational area such as tennis courts and running tracks. Sports Fields Unpaved Any unpaved recreational area such as baseball grounds and soccer fields. Agency: OPM Authoritativeness: Unknown Sensitivity: Public Usage: Public Use Quality: High Quality Created Data: 01/2026 Update Frequency (estimated): Unknown Last Updated: unknown本数据集包含康涅狄格州全州范围的不透水面矢量要素。本数据集基于2023年源影像构建，旨在提供高分辨率、一致性的不透水面覆盖地理空间表征。不透水面要素涵盖已制图的各类地物，包括建筑物、道路、车道、停车场、人行道、铺装路面、游泳池、铺装休闲场地以及桥梁。要素采集与属性赋值严格遵循已定义的分类专属解译规则与最小制图规范。本数据集旨在支持全州制图、基础设施规划、土地覆盖评估、水文与暴雨管理分析、应急管理及其他基于地理信息系统（Geographic Information System）的应用。本数据集包包含三个要素文件。其中土地覆盖要素文件为多边形数据集，每个要素包含以下字段：FID（唯一标识符）、Shape（几何信息）以及CateTitle（要素分类名称）。CateTitle的取值及其定义详见本元数据记录的「实体与属性信息」章节。 分类定义： 道路：指车行道边缘，含路缘石。当道路存在重叠或高架情况时，高架/重叠表面归类为桥梁，地面表面仍归类为道路。道路宽度需大于8英尺，长度需大于50英尺。 人行道：供行人通行的铺装步道，通常平行于街道设置。私人人行道指位于公共产权用地范围之外的人行道，例如从车道边缘延伸至住宅正门的步道；公共人行道指通常位于公共用地通行权范围内、平行于街道的步道。在土地覆盖要素分类中，人行道优先级高于车道或其他铺装表面。人行道宽度需大于3英尺，长度需大于10英尺。 铺装路面：未归入上述特定不透水面要素类别的任何铺装表面。与其他要素一致，其面积需大于100平方英尺。 车道：指从路缘边缘延伸至建筑物的铺装表面。若存在与人行道重叠的情况，人行道优先级更高。车道宽度需大于8英尺，长度需大于10英尺。 停车场：带有清晰停车分区的铺装表面，面积需大于500平方英尺。 建筑物：指面积大于100平方英尺的各建筑物几何占地面积。建筑物基于屋顶轮廓与墙面立面进行采集，以准确识别建筑物基础与地面的衔接位置。本数据集的建筑物源自2023年州航空测绘项目交付的2D激光雷达（LiDAR）提取的建筑物轮廓数据。 桥梁：高于地面的行车表面，不包括步行道。桥梁宽度需大于8英尺，长度需大于50英尺。 游泳池：住宅或商业用地上的地下式开放水体，明显不属于自然水体。游泳池面积需大于100平方英尺。 铺装运动场地：指网球场、跑道等铺装休闲场地。 非铺装运动场地：指棒球场、足球场等非铺装休闲场地。 元数据信息： 负责机构：OPM 权威性：未知 敏感级别：公开 使用权限：公开使用 数据质量：高质量 数据创建时间：2026年1月 预计更新频率：未知 最后更新时间：未知