Common Alerting Protocol

[Phil Wyatt]

Hi Folks,

 

Has anyone got any leads on getting CAP-AU files into QGIS?

 

Sample - https://alert.tas.gov.au/data/cap-au.xml

 

Cheers - Phil

[Bill Williamson]

How frequently?

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[Phil Wyatt]

Hi Bill,

 

Preferably as a live feed that gets updated regularly

 

Cheers Phil

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[Andrew Harvey]

Seems like the old GeoRSS feeds were taken down.

I quickly ported across some code I had written earlier and published it at https://gitlab.com/beyondtracks/tas-alerts-geojson.

In the README there is a link to a live feed updated every 5 minutes, you can load that into QGIS. If you use my live link, expect that I may change it without notice.

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[Rae Allen]

I haven't but be a good project as CAP-AU is being used more broadly now.  I like the use of polygon data in a lot of these emergency feeds.

I once worked on https://www.abc.net.au/emergency/ and the CAP feeds made integration much easier

Cheers

Rae

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[Phil Wyatt]

Thanks for that Andrew but I think its suffering from the same QGIS issue of geojson geometry collections that we have had in the past.

 

I am not getting the required amount of points and no polygons

 

Cheers - Phil

 

From: australian-qg...@googlegroups.com <australian-qg...@googlegroups.com> On Behalf Of Andrew Harvey
Sent: Tuesday, 4 October 2022 2:42 PM
To: australian-qg...@googlegroups.com
Subject: Re: [Aus-NZ-QGIS-group] Common Alerting Protocol

 

Seems like the old GeoRSS feeds were taken down.

To view this discussion on the web, visit https://groups.google.com/d/msgid/australian-qgis-user-group/CAD5VjstY-x2GVpxf25Lf6xv5%2B%3D09t%3DKYUZLwNrKTHzuDoYdZpg%40mail.gmail.com.

[Phil Wyatt]

Hi Rae,

 

I agree it would be great to get support for this as its now all over the place in emergency management organisations.

 

I think the biggest issue is the geometry collections that still don’t work as expected in QGIS. A single event seems to have the ability to have a point, a circle and a polygon of data!

 

Cheers - Phil

 

From: australian-qg...@googlegroups.com <australian-qg...@googlegroups.com> On Behalf Of Rae Allen
Sent: Tuesday, 4 October 2022 2:57 PM
To: australian-qg...@googlegroups.com
Subject: Re: [Aus-NZ-QGIS-group] Common Alerting Protocol

 

I haven't but be a good project as CAP-AU is being used more broadly now.  I like the use of polygon data in a lot of these emergency feeds.

To view this discussion on the web, visit https://groups.google.com/d/msgid/australian-qgis-user-group/CALDaq5%2BCSVf1cxZW%2BSOYatg_CT3aktOiQ5G6_F%2BmYXJF%3D26atw%40mail.gmail.com.

[Andrew Harvey]

I'll add a variant that explodes GeometryCollections

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[Phil Wyatt]

You are a champion! Many thanks

 

It seems like each incident would normally have at least one point, a circle (!!) ‘alert area’ and possibly a polygon,

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[Rae Allen]

True theoretically there is just a polygon and a circle but when the circle has a diameter of zero ... 😁

Great if you have a way of exploding the geometry attribute

Cheers

Rae

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[Andrew Harvey]

I've added an option to split into different Features which avoids GeometryCollections

https://www.beyondtracks.com/contrib/tas-alerts.nogeometrycollections.geojson

[Phil Wyatt]

BINGO! Many thanks Andrew – works perfectly!

 

Now to work on a new QGIS style sheet with all the new icons.

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[bi...@williamson.fm]

Nice work Andrew.