---
name: canadian-notices-to-mariners-ingestion
description: "How to get Canadian Coast Guard Notices to Mariners (NOTMAR) data into a pandas DataFrame and Parquet: access, the request, the format, limits, quirks and terms."
---

# Probe NOTMAR home and Open Information Licence page

Source entry: https://signal-lab-jet.vercel.app/datasets/canadian-notices-to-mariners
Provider: https://www.notmar.gc.ca/
Checked against the provider's documentation: 2026-11-05

## Access
- No account for public NOTMAR downloads covered by the CCG Open Information Licence.

## Request
```bash
curl -I 'https://www.notmar.gc.ca/'
```

## Format
HTML NOTMAR portal; Open Information Licence HTML on canada.ca.

## Load into pandas and Parquet
Needs Python 3 with requests, pandas and pyarrow.
```python
"""NOTMAR + Open Information Licence probe -> pandas -> Parquet."""
import pandas as pd
import requests

UA = {"User-Agent": "SignalLabCheck/1.0"}
rows = []
for url in [
    "https://www.notmar.gc.ca/",
    "https://www.canada.ca/en/canadian-coast-guard/corporate/publications/open-information-licence.html",
]:
    r = requests.get(url, headers=UA, timeout=60, allow_redirects=True)
    rows.append({"url": url, "status": r.status_code, "bytes": len(r.content), "final_url": r.url})
df = pd.DataFrame(rows)
df.to_parquet("notmar_probe.parquet", index=False)
print(df)

```
Run by us on 2026-11-05 (python 3 | pandas | pyarrow | requests). Result: notmar.gc.ca returned HTTP 200 on 2026-11-05; Open Information Licence page on canada.ca was verified via fetch the same day (worldwide royalty-free perpetual licence text).

## Limits
- Not stated.

## Quirks
- Keep attribution statement and official-publication integrity conditions when redistributing.
- Licence applies to the listed CCG publications, not every canada.ca page.

## Terms and attribution
- CCG Open Information Licence v1.0: worldwide royalty-free perpetual use with attribution and integrity conditions.
- Terms page: https://www.canada.ca/en/canadian-coast-guard/corporate/publications/open-information-licence.html

## Sources
- https://www.canada.ca/en/canadian-coast-guard/corporate/publications/open-information-licence.html: "The Licensor grants the Licencee a worldwide, royalty-free, perpetual, non-exclusive Licence to use the Information"
- https://www.canada.ca/en/canadian-coast-guard/corporate/publications/open-information-licence.html: "This licence applies only to the following Canadian Coast Guard publications"

## Help improve this skill
Missing a source, or see something to improve? Call the MCP tool suggest_source or feedback (or POST /api/suggest or /api/feedback). Reviewed ideas: https://signal-lab-jet.vercel.app/agent-suggestions

Information for educational purposes only. Free tiers, limits and licenses belong to the providers and may change; check the provider's own terms before using the data.