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R package PBSmapping - Mapping fisheries data and spatial analysis tools
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Conversion from LORAN-C to LL (Geographic coordinates) #32

Open GoogleCodeExporter opened 9 years ago

GoogleCodeExporter commented 9 years ago 
This issue comes from a TESA Webex course on PBSmapping (Jun 17-18, 2014)
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Good morning,
This didn’t come up in the course yesterday, and I'm not sure if it will 
today, 
but does PBSmapping have any capability to deal with LORAN-C? 

We still sometimes have to work with incoming loran location data on the east 
coast, especially from older fishermen. I don’t actually know of anything in 
R 
that deals with it right now, but I’m really hoping PBSmapping does!

Thanks for taking the time to do this course,
Irene (St. Andrews Biological Station, NB)
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PBSmapping understands lat-long, and km relative to a UTM zone.

I've never used Loran-C, but I thought that once completely treated, the signal 
was transformed into lat-long. I guess I was being naive. 

You will need to find an algorithm to transform your signal into lat-long, 
either coding it yourself or possibly finding someone’s code on internet.

Good luck,
Denis (Institut Maurice-Lamontagne, QC)
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Thanks Denis. 
It is something we will have to code in-house, but I thought I’d check first.

Irene (St. Andrews Biological Station, NB)
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Hello Irene,
We like to keep track of any good ideas like yours. 
If you have a Google account, please add an Issue for Enhancement:
https://code.google.com/p/pbs-mapping/issues/list

Rowan (Pacific Biological Station, BC)
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Hi Rowan,
I can certainly add that to the list, but you may run into an issue of a small 
target audience (hence low priority). 

It seems like we are the only ones to deal with loran and people are always 
incredulous that we still have to deal with it, as it is considered archaic.

I will certainly add it to the account and let you decide on priority. 
I can also let you know once we get around to coding it into R (no promises on 
promptness, we are swamped with work like everyone else).

Irene (St. Andrews Biological Station, NB)
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Issue for Enhancement.
Can we provide a reasonable conversion from LORAN-C to LL?
Is there a conversion utility already available in R (check Roger Bivand)?
I've attached a document that may or may not be relevant to the Issue.

Rowan (Pacific Biological Station, BC)
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Original issue reported on code.google.com by rowan.ha...@dfo-mpo.gc.ca on 19 Jun 2014 at 6:19

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GoogleCodeExporter commented 9 years ago 
Emanuel Sodano's papers on geodesics.

Original comment by rowan.ha...@dfo-mpo.gc.ca on 19 Jun 2014 at 6:42

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GoogleCodeExporter commented 9 years ago 
The IOS library happened to have a copy of this on their shelves:

LORAN-C LATITUDE-LONGITUDE CONVERSION AT SEA - PROGRAMMING CONSIDERATIONS

By:MCCULLOUGH, JR (MCCULLOUGH, JR); IRWIN, BJ (IRWIN, BJ); BOWLES, RM (BOWLES, 
RM)

INTERNATIONAL HYDROGRAPHIC REVIEW, Volume: 62, Issue: 1, Pages: 83-114, 
Published: 1985

Original comment by rowan.ha...@dfo-mpo.gc.ca on 24 Jun 2014 at 8:16

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