SurveyControl

This map represents City of Salem, Oregon, Survey Benchmarks. The Survey Section of the Public Works Department establishes and maintains horizontal and vertical survey control throughout the City for most public and private projects. Vertical datum is NGVD 1929-47. Horizontal datum is NAD 1983-91. The map references detailed GIS data provided by the City of Salem Public Works Department. Contact the City of Salem City Surveyor (503-588-6211) for questions and the most up-to-date information, or [e-mail].本地图展示俄勒冈州塞勒姆市的测量基准点（Survey Benchmarks）。塞勒姆市公共工程部测量科负责在全市范围内为绝大多数公共及私人工程项目建立并维护平面与高程测量控制网。高程基准采用1929-47年国家大地高程基准（NGVD 1929-47），平面基准采用1983-91年北美大地基准（NAD 1983-91）。本地图引用了塞勒姆市公共工程部提供的详细地理信息系统（GIS）数据。如有疑问或需获取最新信息，请联系塞勒姆市测量师（联系电话：503-588-6211），或发送邮件至[e-mail]。