WIS access and usage - Search/Subscribe/Publish
Accessing and using WIS
Three levels of access
- General ad hoc discovery and download
- Registered for subscription
- Registered for publication
Each level inherits the access of the level above it. i.e. Registered for publication gives general and subscription access
- Any one can go to a GISC and search and, subject to the data policy, down load products discovered
- If it is Res 40 essential or unrestricted GTS traffic and less than 24 hours, it can be obtained from the GISC
- Other information is accessed from the information custodian
- The custodian is normally, but not necessarily a WIS centre
- GISCs - Go to http://www.wmo.int/giscs and select the GISC you wish to visit
- Any centres (inlcuding GISCs) - Go to http://wis.wmo.int/WISCentresDb and select the centre link under the "Function" column
Ability to subscribe using a GISC service
- Authority to register to subscribe to a GISC service comes from either the GISC or National WIS focal point
- Not all GISCs offer the same resolution of subscription services
- Normally limited to new information, often only GTS traffic
- Have to subscribe to a data custodian if not circulated on WIS.
Down loading of information
- Downloading methods are described in WIS TechSpecs 10, 11 & 12
- See WMO No 1060 Part IV, para 4.11-4.13 & appendix D)
- Normally by http, ftp or email
- Some GISCs require registration to down load data.
- Registration necessary if using ftp and email
- Always necessary if subscribing.
- Can use GTS for downloading via subscription services if connected to GTS (ie an NMHS)
- Format is file (unless on older GTS circuit where bulletin may not always be in file format)
- File names normally GTS file naming convention.
Ability to publish
- Publishing can only be through a registered data centre (NC or DCPC)
- A strict governance process is in place for a publisher to be registered as a data centre (NC or DCPC)
- Registration involves PR, TC and RA
- Centre must be WIS compliant
- WIS centres can publish information on behalf of other contributors but are responsible for compliance as if they were the originator.
- Some GISCs may host data centre’s publishing service
- i.e. GISCs may accept input from a non-NC or non-DCPC source, where an NC or DCPC has authorized a source to publish direct to the GISC
- All information must have a WIS discovery metadata record published before the information can be sent or discovered in WIS
- See WIS TechSpec 1 (WMO No 1060 Part IV, para 4.2 & appendix D)
Publishing information on WIS
- Uploading information is normally by a file sent by a method agreed between the provider and uploading WIS centre
- See WIS Tech Spec 2 (WMO No 1060 Part IV, para 4.3 & appendix D)
- If data is to go on GTS, the file should comply with GTS file naming convention
- See GTS Manual, Part II, Attachment II-15
- WMO approved format (data representation) is preferred but not compulsory
- Most common or preferred methods are via ftp or email from provider to the uploading WIS centre
- If the WIS centre is on GTS, then may use normal GTS publishing.
- Receiving centre is required to check existence of WIS discovery metadata
Note:GISCs will allow a grace period of 2 minutes for metadata to turn up before rejecting the product
How do users subscribe to newly published information?
- Uploading to WIS does not guarantee distribution
- WIS and the GTS is subscription based
- People must be alerted to new products so that they can subscribe
- Process for GTS is Metno with fixed publishing deadlines
- For other WIS information, some GISCs support RSS alerting to new products
- In most cases, it is up to the publisher to advise the target community that the new product is coming.
Additional users may find the product through DAR or RSS.
- If you have any questions, please email email@example.com or consult with your GISC help desk