Ontario Boring Logs & Geotechnical Data
101,200 public boring logs in Ontario; 91,856 with digitized SPT, soil or CPT data; 9,344 scanned log PDFs. Sources include Ontario Geological Survey (OGS), Ontario Ministry of Transportation (MTO). Free to search on the map, download or query by API.
Where the data comes from
What's in a boring log from Ontario
The 91,856 digitized borings carry the data engineers actually use: SPT blow counts (N-values) by depth, soil and rock descriptions, groundwater observations and, where the source ran cone penetration tests, CPT tip resistance and sleeve friction. A further 9,344 logs are scanned PDF reports — the original agency drawings — which you can open and download from the map. Holes are typically about 26 ft (8 m) deep; one in twenty goes past 105 ft (32 m). Not sure what a boring log looks like? See annotated example boring logs.
How to get this data
- Map — pan to a site, click a boring, and view the log, the original PDF, or an ML soil-profile prediction. No account needed.
- Downloads — every boring exports as PDF, DIGGS XML or AGS4; draw a polygon on the map for a multi-boring export or a site report.
- API — query borings by coordinates or bounding box, pull SPT/CPT/lab records, and generate site reports programmatically.
- Contribute — have Ontario boring logs that are not here yet? We take PDFs, DIGGS, AGS and spreadsheets.
This data was collected from public agencies and is republished as-is. It is a planning tool, not a substitute for a site investigation; see the terms and disclaimer. Counts refreshed 2 November 2026.
Other places
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