SIGMETs using unknown points?

[Guest iantony]

This is a bit off topic, but I'm writing some software at the moment which parses SIGMETs, and visualises the phenomena on a map with structured data. I noticed some of the SIGMETs have unknown waypoints/aerodromes which are not in the latested Designated Airspace Handbook from Air Services Australia... the points in question are CAJE, YMLF, YPTB, YSCK, WEBS, YKNH, KIAN, and YXTX. Can anyone shed any light on the topic or point me in the direction of where I can find the lat/lon coordinates for these points? :confused:

 

 

[ahlocks]

They're VFR waypoints. encoding and decoding tables are Listed in ERSA

 

http://www.airservices.gov.au/publications/current/ersa/VFR__12-Mar-2009.pdf

 

 

[Guest iantony]

Thanks for your help! That info covered the waypoints like WEBS and KIAN, etc. but it still leaves the aerodromes... where can I get hold of those?

 

 

[ahlocks]

Aerodrome and ALA codes

 

http://www.airservices.gov.au/publications/current/ersa/LND__12-Mar-2009.pdf

 

Or the whole lot

 

http://www.airservices.gov.au/publications/aip.asp?pg=10

 

 

[Guest iantony]

Sorry, ignore previous post.. I found them as you suggested!

 

http://www.airservices.gov.au/publications/pending/ersa/LND__4-Jun-2009.pdf but no lat/lon coordinates unfortunately.

 

 

[ahlocks]

It's going to be a bit tedious, but Lat & lon co-ords are listed in the ERSA and it's also on the charts for the aerodrome.

 

Airservices Australia AIS - DAP 118 - Aerodrome & Procedure Charts

 

There was some discussion of a text file floating around that has the ALAs for people using OzExplorer. Might save you some time...

 

Cheers!

 

 

[Guest iantony]

Thanks, I'll try to find the discussion you mentioned. The ALAs are something I really want, as I can get the other waypoints from the PDF document you provided.

 

 

[Guest Decca]

Here's the thread Iantony. Also had a quick look but couldn't find it, but all state ALA's, AD's & waypoints have been linked to in a couple of different file types, the better type by Slarti (I think).

 

Decca

 

Cheap navigation - Mio Moov and OziExplorerCE

 

 

[ahlocks]

That's the one. Thanks Decca

 

Also this one from Basscheffers;

 

Wanting to get some airfields into my rather simple Garmin GPS and into Google Earth, I went searching. I found a file with a fair few airfield, but also some HLSs. So I took the ERSA PDFs and decided to filter the HLSs out. (ERSA show the code and name, but not the coordinates...)I then tested if there were any missing that have full ERSA entries and entered those by hand.

 

Because most small GPSs can't take more than 700-1000 waypoints, 1500 wasn't going to work, so I filtered then into a file per state, as well as one big file.

 

I also took all the VFR Waypoints from ERSA and converted these into CSV - also full and by state.

 

You can tell the difference between a waypoint and ALA by the way the name is formatted; ALAs are: "YPPF - Parafield" and WPTs are: "SUB + Substation".

 

Then I converted all into KML so you can view them in Google Earth also.

 

I did some random checks and some of the airfields are not very accurate, but they should get you within visual distance of where they are. You wouldn't leave without checking them on the map anyway, would you!? :)

 

I thought I'd share this with you folks, you may find it useful!

 

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