The Ontario Hydro Network (OHN) is a provincial medium scale originating from data with regional scales of 1: 10,000 in Southern Ontario, 1: 20,000 in Northern Ontario and 1: 50,000 in the Far North. The shoreline is taken from the OHN - Waterbody data class. This data is used for cartographic purposes and web mapping services. This product requires the use of geographic information system (GIS) software. [Ontario Hydro Network (OHN) User Guide (Word)](https://www.sdc.gov.on.ca/sites/MNRF-PublicDocs/EN/CMID/OHN%20-%20UserGuide.docx)

This geospatial dataset contains the geographic boundaries of the 34 Public Health Units (PHUs) in Ontario, based on Statistics Canada’s Health Region Boundary File (2018). A PHU is the area of jurisdiction of a board of health. PHUs in Ontario are defined in Regulation 553 (Revised Regulations of Ontario), pursuant to Health Protection and Promotion Act R.S.O. 1990, Amended to O. Reg. 64/05.

The boundaries of provincial park administration zones in Ontario.

The outer boundary of the Province of Ontario. Land identifying the extent of the Province of Ontario for mapping purposes. This product requires the use of geographic information system (GIS) software.

[Fish ON-Line](https://www.ontario.ca/page/how-use-fish-line) is a mobile fishing tool with information on where to fish in Ontario. It includes information for over 20,000 waterbodies including: * fish species observations * fish stocking * fishing regulations and sanctuaries * fishing access points * lake depth contours * licence issuer locations It also has links to other sources of information such as: * broad-scale monitoring program * provincial parks * Guide to Eating Ontario Fish * local weather forecasts Related datasets: * [Aquatic Resource Areas - Polygons](https://data.ontario.ca/dataset/aquatic-resource-area-polygon-segment) * [Aquatic Resource Areas - Lines](https://data.ontario.ca/dataset/aquatic-resource-area-line-segment) * [Bathymetry Lines](https://data.ontario.ca/dataset/bathymetry-lines) * [Fishing Regulation Exemptions](https://data.ontario.ca/dataset/recreational-fishing-regulations-data) * [Fish Stocking](https://data.ontario.ca/dataset/fish-stocking) * [Fishing Access Points](https://data.ontario.ca/dataset/fishing-access-points) * [Fisheries Management Zones](https://data.ontario.ca/dataset/fisheries-management-zone) * [Geographic Names](https://data.ontario.ca/dataset/named-geographic-features) * [Guide to Eating Ontario Fish](https://data.ontario.ca/dataset/guide-to-eating-ontario-fish-advisory-database) * [Licence Issuer Locations](https://data.ontario.ca/dataset/hunting-and-fishing-licence-issuers) * [Ontario waterbody location identifer](https://data.ontario.ca/dataset/ontario-waterbody-location-identifier)

A Township is a land subdivision in Ontario. This information was captured through the Ontario Base Mapping Program, is maintained by the Ministry of Natural Resources and distributed through Geospatial Ontario (GEO) Warehouse. The spatial accuracy for some of the townships was improved through the Ontario Parcel, Township Realignment and Township Improvement projects. Improvements may include: * road allowance widths * spatial changes to better represent where the township boundaries are located * more consistent concession names Materials used to improve the location of township lines may include: * township Improvement plots * survey information i.e. retracements * original township plans * surveys notes * the physical features e.g. fence lines in the corporate editing environment * water bodies * GPS Ontario Road Network geometry This product requires the use of geographic information system (GIS) software.

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 point features. Examples include: * waterfalls * rapids * rocks * Sea Lamprey barriers * shipwrecks This product requires the use of geographic information system (GIS) software. [Technical Bulletin: Data migrated to new Ontario Hydro Network (OHN) - Hydrographic Feature Data Classes (PDF)](https://geohub.lio.gov.on.ca/datasets/mnrf::ontario-hydro-network-ohn-hydrographic-point/)

Wildlife Management Units are used for a number of wildlife management purposes, like indicating the areas of Ontario where hunting open seasons and harvest quotas apply. Wildlife Management Unit boundaries are regulated under the Fish and Wildlife Conservation Act - Ontario Regulation 663/98, Part 6 as amended.

This is a magnitude 5.0 earthquake scenario under Lake Ontario, very close to Toronto. This fault is not known to be active but demonstrates a plausible earthquake scenario for Toronto region.

This dataset contains the total annual releases of radionuclides released directly to the environment through direct discharge (i.e. releases to water) from the closed mine sites near Elliot Lake, Ontario, Canada.Note that there is no stack emissions for the Elliot Lake.