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filter NWS

Lynn Deffenbaugh
 

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I should have also suggested that some sort of range filtering might be possible if you actually loaded up the referenced zone and/or county shapefiles, parsed the received packets to identify which zone(s) and/or county(ies) are affected and then do an area match to find if any of the selected shapes is in the desired range.



Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32


On 4/30/2024 9:02 PM, Lynn Deffenbaugh wrote:

The problem is going to be that some of the weather packets are messages without coordinates.?? As a matter of fact, I'm not sure posits are even generated for most packets.?? Maybe just the Multi-Line packets actually have coordinates in order to draw the shapes.

The full specifications of the NWS APRS weather packets can be found at:

and


Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32




On 4/30/2024 7:47 PM, WB2OSZ wrote:
That is a very interesting question.
It sounds like we might need a new type of filter based on the weather region codes.

Could you provide a few examples of the packets you are seeing?

73,
John WB2OSZ


Lynn Deffenbaugh
 

¿ªÔÆÌåÓý

The problem is going to be that some of the weather packets are messages without coordinates.?? As a matter of fact, I'm not sure posits are even generated for most packets.?? Maybe just the Multi-Line packets actually have coordinates in order to draw the shapes.

The full specifications of the NWS APRS weather packets can be found at:

and


Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32




On 4/30/2024 7:47 PM, WB2OSZ wrote:

That is a very interesting question.
It sounds like we might need a new type of filter based on the weather region codes.

Could you provide a few examples of the packets you are seeing?

73,
John WB2OSZ


 

That is a very interesting question.
It sounds like we might need a new type of filter based on the weather region codes.

Could you provide a few examples of the packets you are seeing?

73,
John WB2OSZ
 

How should go about filtering NWS products to just a radius around me? Currently I am IG->RF all EAX products, but i want to filter all EAX products within 50km or so of me.?

IGFILTER ?-b/AC0OK-10/KE0HDU*/CHILLI e/AE5PL-WX b/EAX* ?r/40.070/-93.611/120
FILTER IG 0 ( r/40.070/-93.611/120 & b/METAR-2 ) | ( b/KB0RPJ-*/SNZM7/TTZM7/CHZM7/LAMO7/EAX*/MTRK*/MOA*/KLWD & ! b/AC0OK*/KE0HDU*/CHILLI ) | ( r/40.070/-93.611/41 & ! b/AC0OK-10/CHILLI )?
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my current filters

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