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Converting X, Y coordinates to Sextant Coordinates

Zara

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Some assist programs and clients use these x, y coordinates instead of sextant coordinates on their map. Does anyone know if there is a formula or something to convert one from the other?
 

DreadLord Lestat

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EC and cartographer can toggle back and forth between the two types.
 

Zara

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EC and cartographer can toggle back and forth between the two types.
I'm not using either of those, but would like to understand how they do it. I'd like to see if I can write a little program myself to convert back and forth like they do. Any idea how it's done? Is there a formula?
 

DreadLord Lestat

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Not a clue to be honest. I have always been of the mindset "why recreate the wheel". If there is already something that does that, why make something new that will do that. If you are bound and determined, I pulled this up from a "map cordinates ultima online" google search. remember, Google will always be your friend. UO Stratics - The Geography of UO
 

Basara

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Also, there's this online resource I put together a few years ago by converting the old tool one of the FCB chapters or other fishing guild did almost 2 decades ago, though I had to get a lot of help to do so. It converts degrees and minutes to the x,y for putting the results into a UOAM or UOCartographer .map file. The file also has the data you need to convert the other direction (the ratio between degrees and the other system, and where the 0,0 point in Degrees is in the other system), but isn't set up for doing the conversion to degrees, only coming from degrees.

I have a version of the T-Map tab that works for all facets as a Corel/WP Quattro file, but it breaks when I try to convert it to a Google Sheet.
If someone wants to make the proper edits, here's the information you need.

1. You would need to change the "Facet" column to take a number from 0 to 6 instead of T or F
2. You would need to change the code for the yellow area to take the number above and insert it in place of the or "0" in the code before the "TMAP". The last bit of of that code line would need to be changed to put the facet name instead of T or F, based on the number put in column G. (this is where my issue is - trying to fix it on my own has never worked).
3. The facet number codes are as follows:
  • 0 = Both Trammel & Fel (for SOS)
  • 1 = Felucca
  • 2 = Trammel
  • 3 = Ilshenar
  • 4 = Malas
  • 5 = Tokuno
  • 6 = Ter Mur and Eodon
UOAM/UOCart Spreadsheet
 
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