Rail Lines

1. Title & Overview Dataset Name: Rail Stations Summary: Spatial dataset of Rail lines around the Philadelphia metro area. Geographic Coverage: Philadelphia metropolitan area. Time Period: Created May 8th 2018; last updated Feb. 2020. 2. Purpose & Use Intended Use: To visualize SEPTA Stations for mapping, analysis, and operational reference. Limitations: No documented constraints, scale issues, or known data caveats; users should verify suitability for high‑precision applications. Update Frequency: Updated on an as‑needed basis. 3. Data Source & Methodology Source(s): City of Philadelphia; Open Data Philly Collection Method: Not formally documented. Processing Steps: Key transformations, cleaning steps, and calculations are not fully documented. 4. Variable Breakdown (Attribute Table Fields) - DVRPC_ID (Long): Delaware Valley Regional Planning Commission unique station ID. Example: "324" - SEPTA_ID (Long): SEPTA unique station ID. Example: "90810" - TYPE * (Text): Type of transportation line. Example: "Subway" - LINE (Text): Transportation line the station is associated with. Example: "PATCO" - STATION * (Text): Name of the station. Example: "Westmont" - OPERATOR (Text): Transportation authority in charge of line. Example: "PATCO" - GLOBALID (Global ID): Global Identifier. Example: "{2E85C71C-219E-4870-AF72-96B86DE17F67}" - COUNTY (Text): County where the line is contained in. Example: "Chester" - STATE (Text): State the station is contained in. Example: "PA" - Shape (Geometry): Spatial feature representing the transportation stations. Example: "Polygon" 5. Data Quality & Accuracy Positional Accuracy: Approximately 5–10 meters from the true on‑ground location; not survey‑grade. Attribute Accuracy: High; believed to accurately reflect operations at time of creation. Completeness: Some missing values in (TYPE *, SEPTA_ID,) field. No missing values in core fields (Station, Shape, or DVRPC_ID) 6. Credits & Attribution Data Owner: SEPTA Planning Division Citation: SEPTA Planning Division

1. 标题与概述
数据集名称：铁路车站
摘要：费城都会区周边铁路线空间数据集
地理覆盖范围：费城都会区
时间周期：2018年5月8日创建，2020年2月最后更新
2. 用途与使用说明
预期用途：用于可视化SEPTA车站，以开展制图、分析及运营参考
数据局限性：无已记录的约束条件、比例尺问题或已知数据瑕疵；用户需自行验证其是否适用于高精度应用场景
更新频率：按需更新
3. 数据来源与处理方法
数据来源：费城政府；开放数据费城（Open Data Philly）
数据采集方式：未正式记录
处理步骤：关键转换、数据清洗及计算流程均未完整记录
4. 变量明细（属性表字段）
- DVRPC_ID（长整型）：特拉华谷区域规划委员会（Delaware Valley Regional Planning Commission，DVRPC）专属车站标识符。示例："324"
- SEPTA_ID（长整型）：SEPTA专属车站标识符。示例："90810"
- TYPE *（文本型）：交通线路类型。示例："Subway（地铁）"
- LINE（文本型）：车站关联的交通线路。示例："PATCO"
- STATION *（文本型）：车站名称。示例："Westmont（西蒙特站）"
- OPERATOR（文本型）：线路运营管理机构。示例："PATCO"
- GLOBALID（全局标识符）：全局唯一标识符。示例："{2E85C71C-219E-4870-AF72-96B86DE17F67}"
- COUNTY（文本型）：线路所在县级行政区。示例："Chester（切斯特县）"
- STATE（文本型）：车站所在州级行政区。示例："PA（宾夕法尼亚州）"
- Shape（Geometry，几何形状）：代表交通车站的空间要素。示例："Polygon（多边形）"
5. 数据质量与精度
点位精度：与真实地面点位的偏差约为5至10米，未达到测量级精度
属性精度：整体较高，可准确反映数据集创建时的线路运营状况
数据完整性：TYPE *、SEPTA_ID字段存在部分缺失值；核心字段（Station、Shape及DVRPC_ID）无缺失值
6. 致谢与引用
数据所有者：SEPTA规划部
引用规范：SEPTA规划部