Street Centerline

As part of the basemap data layers, the street centerline map layer is an integral part of the Lexington Fayette-Urban County Government Geographic Information System. Basemap data layers are accessed by personnel in most LFUCG divisions for basic applications such as viewing, querying, and map output production. More advanced user applications may focus on thematic mapping, summarization of data by geography, or planning purposes (including defining boundaries, managing assets and facilities, integrating attribute databases with geographic features, spatial analysis, network analysis, geocoding, and presentation output). This dataset is designed to represent and locate the street centerlines in Lexington-Fayette County. The street centerlines are broken down into line segments that run from intersection to intersect and include street maintance, ownership, address ranges, and name information. The centerlines are updates through a variety of methods. Most commonly new streets are added from georeferenced plats, but corrections are alwo made by GPS collection and referencing to aerial photos. The data is in ESRI feature class format, but can be exported to any number of supported formats, including shapefile and dxf. The native projection for the data is Kentucky State Plane North (NAD83), but may have been reprojected for use in other applications. Please check metadata to determine current projection.作为底图数据图层的组成部分，街道中心线图层是列克星敦费耶特城市县政府地理信息系统 (Lexington Fayette-Urban County Government Geographic Information System，以下简称LFUCG) 不可或缺的组成部分。多数LFUCG下属部门的工作人员可调用底图数据图层，开展查看、查询与地图输出制作等基础应用。更高级的用户应用可聚焦于专题制图、按地理区域汇总数据，或用于规划工作（包括边界划定、资产与设施管理、属性数据库与地理要素的集成、空间分析、网络分析、地理编码以及演示成果输出）。本数据集旨在表征并定位列克星敦费耶特县内的街道中心线。街道中心线被拆分为连接各交叉口的线段，涵盖街道养护、权属、地址范围及名称等属性信息。该中心线图层通过多种方式进行更新：最常见的方式为从地理参考地块中新增街道，同时也会通过GPS采集以及参考航空影像进行数据修正。该数据采用ESRI要素类 (ESRI feature class) 格式存储，可导出为多种受支持的格式，包括形状文件 (shapefile) 与DXF格式。该数据的原生投影为肯塔基州平面北坐标系 (NAD83)，但也可能已被重新投影以适配其他应用场景。请查阅元数据以确认当前所使用的投影方式。