Ontario Hydro Network (OHN) - Hydrographic Line

A feature is a representation of a real world object, such as a lake, stream, dam or rapid. There are three hydrographic feature classes: points, lines and polys. All may impede or be hazardous to waterflow and/or navigation on a watercourse or waterbody. This data shows natural and manmade line features. Examples include: break walls dams waterfalls lock-gates rapids rocks Sea Lamprey barriers Additional Documentation OHN - User Guide (Word) OHN - Data Capture Specification for Hydrographic Features (Word) Status Required: data needs to be generated or updated Maintenance and Update Frequency Not planned: there are no plans to update the data Contact Ontario Ministry of Natural Resources - Geospatial Ontario, [e-mail]要素（feature）是现实世界对象的数字化表征，例如湖泊、溪流、水坝与急流。水文要素类共分为三类：点要素、线要素与面要素（polys）。所有此类要素均可能阻碍水流，或对水道、水体上的航行造成安全隐患。本数据集涵盖天然与人工线状要素。示例包括：防波堤、水坝、瀑布、船闸闸门、急流、礁石以及七鳃鳗阻隔设施。附加文档：OHN用户指南（Word格式）、OHN水文要素数据采集规范（Word格式）。所需状态：需生成或更新该数据集。维护与更新频率：无更新计划，暂无数据更新安排。联系方式：安大略省自然资源部地理空间分部，邮箱：[e-mail]