OGS Earth

Index to all maps published by the Ontario Geological Survey since 1891.

Index to all Miscellaneous Release - Data products

The indexes link to GeologyOntario where the maps and Miscellaneous Release - Data products can be downloaded free of charge

Index to Provincial Magnetic and Gravity Data, Regional Published Airborne Surveys and Seimic Surveys found within Ontario.

The index links to GeologyOntario where the Geophysical datasets can be downloaded free of charge

Index to Aggregate Resource Inventory Papers highlighting the inventory and evaluation of sand, gravel and bedrock resources of selected areas across Ontario

The index links to GeologyOntario where the papers and digital maps can be downloaded free of charge

Ontario claim map data including active claims, alienations and dispositions

Note: The Claims data presented here is an unofficial version to be used only for viewing purposes. For official Ontario Mining Claim Information please visit the CLAIMaps online application or the Mining Claims Information Database.

Ontario's bedrock geology at a compilation scale of 1:250 000. Layers include bedrock units, major faults, dike swarms, iron formations, kimberlites and interpretation of the Precambrian bedrock geology underlying the Hudson Bay and James Bay lowlands Phanerozoic cover

Download the Bedrock Geology in GIS format

Ontario's Quaternary Geology at a compilation scale of 1:1 000 000

This layer includes Quaternary geology units, point features such as drumlins and glacial striae and line features such as eskers, shore bluffs and moraines

Download the Quaternary Geology in GIS format

Ontario's Mineral Deposit Inventory showing occurence type, primary and secondary commodity, deposit name and a link to the full MDI record on GeologyOntario.

Download the MDI database in GIS format.

The Drill Hole Database contains information for over 126 000 percussion, overburden, sonic and diamond drill holes. Data include company name, company hole number, township and a link to the full drill hole record on GeologyOntario

Download the Diamond Drill Hole database in GIS format.

AMIS is a database containing information on all known abandoned and inactive mine sites located within the province of Ontario. 

This GoogleEarth version of the AMIS dataset includes information on mine site names, status, Mining district, Primary Commodity, Jurisdiction, township, NTS Area and a link to the full AMIS record located on GeologyOntario. Locations of active sites and sites covered under Closure Plan are not included in this layer.

The Bouguer Gravity grid of Ontario was compiled from approximately 55,639 gravity stations The Total Magnetic Field grid is comprised of of 200 m x 200 m grid cells

Download the Single Master Gravity and Aeromagnetic data .

Shaded relief and elvation model aquired from NASA through the Shuttle Radar Topography Mission (SRTM)

Souther Ontario Surficial Geology at a compilation scale of 1:50 000. Layers includes Surficial Geology units within Southern Ontario, directional point features such as drumlins and glacial striae, non-directional point features such as pits, fossil locations and outcrop and line features such as eskers, shore bluffs and moraines

Download the Surficial Geology data in GIS format

Southern Ontario Physiography at a compilation scale of 1:50 000. Layers include landforms such as drumlins and moraines, physiographic regions, linear features, such as escarpments and shorecliff point features such as sand dunes and mud flow scars.

Download the Physiography data in GIS format

Southern Ontario Paleozoic Geology at a compilation scale of 1:50 000. Layers include Paleozoic geological units, linear features such as faults, point features such as quarry, drill hole and outcrop locations and photos depicting key sections of each of the Paleozoic rock formations found across southern Ontario

This layer shows the regional distributions of karstification of Paleozoic bedrock units across Southern Ontario and Manitoulin Island. Layers include karst and paleozoic geology unit polygons, karst point features observed or compiled from existing publications, observed karst features include caves, sinkholes, and disappearing streams and photographs of various observed karst features located across southern Ontario

Download the Karst data in GIS format

The drift thickness map consists of two layers, drift thickness and ground surface shaded relief. The bedrock topography map consists of two layers, bedrock elevation and bedrock elevation shaded.

Download the Bedrock Topography and Overburden Thickness Data in GIS format

The Ambient Groundwater Geochemistry Program seeks to characterize the natural geochemistry of groundwater across Ontario. This release contains the data from the first 4 years of sampling, which covers all of southwestern Ontario and encompasses over 40 000 km². The data include detailed inorganic chemistry for more than 900 water samples.

Download the Ambient Groundwater Geochemistry Data in GIS format

This layer highlights the Google Earth component of the first three 3-D Groundwater Resource Studies released to date.

3-dimensional mapping of surficial aquifers has been undertaken within strategic locations surrounding the Greater Golden Horseshoe of southern Ontario. Knowing the distribution and character of subsurface aquifers is necessary if wise decisions are to be made regarding the protection and wise management of our groundwater resource.

Engineering Geology Terrain Studies at a compilation scale of 1:100 000 This layer highlights evaluations of near-surface geological conditions with a view to determining the engineering capability of the terrain in Northern Ontario

Download the NOEGTS data in GIS format.

This layer provides the user with an approximate location, physical character, age and chemical nature for the various “rhyolite” units in Northeastern Ontario.

Download the Northeastern Ontario Rhyolite Database