Plazas

City of Cambridge, MA, GIS basemap development project encompasses the land area of City of Cambridge with a 200-foot fringe surrounding the area and Charles River shoreline towards Boston. The basemap data was developed at 1" = 40' mapping scale using digital photogrammetric techniques. Planimetric features; both man-made and natural features like vegetation, rivers have been depicted. These features are important to all GIS/mapping applications and publication. A set of data layers such as Buildings, Roads, Rivers, Utility structures, 1 ft interval contours are developed and represented in the geodatabase. The features are labeled and coded in order to represent specific feature class for thematic representation and topology between the features is maintained for an accurate representation at the 1:40 mapping scale for both publication and analysis. The basemap data has been developed using procedures designed to produce data to the National Standard for Spatial Data Accuracy (NSSDA) and is intended for use at 1" = 40 ' mapping scale. Where applicable, the vertical datum is NAVD1988. Explore all our data on the Cambridge GIS Data Dictionary. Attributes Name Type Details Description TYPE type: String width: 50 precision: 0 All types are plazas

马萨诸塞州剑桥市地理信息系统（Geographic Information System, GIS）底图开发项目，覆盖范围包含剑桥市辖区、周边200英尺缓冲区，以及朝向波士顿的查尔斯河（Charles River）岸线区域。
该底图数据采用数字摄影测量技术，以1英寸=40英尺的制图比例尺（1" = 40'）制作完成。
底图已绘制各类平面制图要素，涵盖人工地物与自然地物（如植被、河流等）。此类要素可适配所有GIS/制图应用及出版工作需求。
地理数据库（Geodatabase）中已构建并存储多组数据图层，包括建筑物、道路、河流、市政公用设施以及1英尺间隔等高线等。
所有要素均完成标注与编码，以实现特定要素类的专题表达；同时维护要素间的拓扑关系，确保在1:40制图比例尺下可精准呈现，适配出版与分析工作。
本底图数据遵循《国家空间数据精度标准》（National Standard for Spatial Data Accuracy, NSSDA）规定的流程开发，仅适用于1英寸=40英尺的制图比例尺。
如适用，垂直基准面采用北美垂直基准1988（North American Vertical Datum 1988, NAVD1988）。
请查阅剑桥市GIS数据字典以获取全部数据详情。
属性字段详情如下：字段名为TYPE，数据类型为字符串，宽度限制50，精度为0；所有要素类型均为广场（plazas）。