Assessment Files

Snapshot of Google Earth assessment file KML

The GeologyOntario (includes OGSEarth) web pages will be updated with a new look in the coming weeks, starting at the end of September 2021.
The updated design improves the user experience by simplifying the layout, making the pages more mobile compatible, and aligning with other Ministry web pages.
Please contact Alphons Evers (alphons.evers@ontario.ca) if you encounter any issues after the change or have any questions.

During this update, this page will be removed. Please update your bookmark to the following: Ontario Assessment File Database (OAFD).

We are committed to providing accessible customer service.
If you need accessible formats or communications supports, please contact us.

(updated September 1, 2021)

Assessment Files contains the technical results from all exploration work done in the province of Ontario.
Data include: details on location, property ownership, type of work done, commodities sought for each assessment file and a link to the PDF version of each file that is stored on GeologyOntario.

Download the Assessment Files database in GIS format. (updated September 1, 2021)

Additional donated data that are not available online may be accessed at each of the 8 Resident Geologist Program offices located throughout the province.