TOC > MSC data > MetNotes > MetNotes data on MSC Datamart
MetNotes data
This page describes the MetNotes data available in GeoJSON format via the MSC Datamart.
Data location
MSC Datamart data can be automatically retrieved with the Advanced Message Queuing Protocol (AMQP) as soon as they become available. An overview and examples to access and use the Meteorological Service of Canada's open data is also available.
The data is available via the HTTPS protocol. It is possible to access it with a standard browser. In this case, we obtain a list of links giving access to a GeoJSON file.
The MetNotes data are available at the following address:
https://dd.weather.gc.ca/metnotes
A history of 24 hours is kept in this directory.
Filename nomenclature
NOTE: ALL HOURS ARE IN UTC.
The files have the following nomenclature:
{YYYYMMDD}T{hhmmss.mss}Z_MSC_MetNotes.json
where:
- YYYYMMDD : Year, month and day of data emission
- T : Time delimiter according to ISO8601 norms
- hhmmss.mss : Hour, minute, second and milliseconds when data are produced
- Z : Time zone (UTC hour)
- MSC : Constant string indicating that the data is from the Meteorologcal Service of Canada (MSC)
- MetNotes : Constant string indicating that data is from MetNotes
- json : File extention indicating the GeoJSON format
Example :
- 20220207T000000.123Z_MSC_MetNotes.json
Note : The use of milliseconds is required to ensure the uniqueness of the notes issued.
File content
The temporal fields in the GeoJSON file are defined as follows:
| Element | Description |
|---|---|
| start_datetime | The forecaster defined time when the weather conditions addressed by the MetNote are expected to begin. |
| end_datetime | The forecaster-defined time when the weather conditions addressed by the MetNote are no longer expected. |
| expire_datetime | If more than 27 hours have passed since a MetNote has been published (Stale time + 3 hour’s grace), it will be considered Expired and automatically removed from dissemination platforms. |
| publish_datetime | The time that the forecaster indicates a MetNote MetObject is ready for product generation. |
Support
If you have any questions about this data, please contact us.
Announcements from the dd_info mailing list
Announcements related to this dataset are available in the dd_info list.