Steve Jackson Games Forums What are your map coordinates?
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 12-07-2018, 07:56 PM #1 hcobb     Join Date: Aug 2004 Location: Pacheco, California What are your map coordinates? I'm just gonna arbitrarily choose the following unless somebody has a better system lying around.Dranning - T17 Osley - S11 Newdelve - N15 __________________ -HJC
 12-07-2018, 10:26 PM #2 platimus   Join Date: Dec 2017 Location: behind you Re: What are your map coordinates? I've used similar coordinates for battle/encounter maps. Using the alphabet works great for small maps. It can still work fine for these larger, overworld maps if you start using AA, BB, CC, etc. after reaching Z but you'll keep having to increase the #of digits in your coordinate every 26 columns. (AAA, BBB, etc.) I'd stick with the traditional number/number system for large and/or overworld hex maps. first column = 01, second column = 02, etc. Dranning - 2017 Osley - 1911 Newdelve - 1415 Using numbers has some nice mathematical properties. If you move south, you add 1 to your current hex#. If you move north, subtract 1. Moving in the easterly and westerly directions depends on whether or not you start numbering on the half-hexes on the edge of the map. Most that I've seen don't assign numbers to those half-hexes but you and I seem to be doing it here so... *** Moving north-west, subtract 101 from your current hex#. Moving north-east, add 100, then subtract 1 (yes, also known as adding 99 LOL). Moving south-west, subtract 100. Moving south-east, add 100. *** (assuming you have less than 100 rows/columns. if you have more than 100 rows, then you be adding/subtracting by 1000s.) *** EDIT *** Actually, these formulas aren't quite right. I figured this out a long time ago and thought I remembered how it worked. There is a formula to it though. I just can't remember it and I'm too tired (late at night) to re-figure it out right now. I think there are alternations. Like, you subtract 101 if you're in an even column or 100 if you're in an odd column, etc. __________________ Miranda Warning: Anything you say can and will be used against you in a forum of rules-lawyers. Last edited by platimus; 12-07-2018 at 11:12 PM.
 12-08-2018, 04:38 AM #3 XRaysVision   Join Date: Jul 2018 Re: What are your map coordinates? Wasn’t there a standard system used by SPI back in the 70’s? I think that Avalon Hill had a system (the same?) as well.
 12-08-2018, 10:36 AM #5 hcobb     Join Date: Aug 2004 Location: Pacheco, California Re: What are your map coordinates? My inspiration is the spreadsheet. __________________ -HJC
12-08-2018, 12:08 PM   #6
platimus

Join Date: Dec 2017
Location: behind you
Re: What are your map coordinates?

Quote:
 Originally Posted by hcobb My inspiration is the spreadsheet.
LOL
Yeah, when I started using [letter][number] for encounter maps, my inspiration was chess, battleship, and bingo!
__________________
Miranda Warning: Anything you say can and will be used against you in a forum of rules-lawyers.

12-08-2018, 12:51 PM   #7
JLV

Join Date: Nov 2010
Location: Far northern California
Re: What are your map coordinates?

Quote:
 Originally Posted by XRaysVision Wasn’t there a standard system used by SPI back in the 70’s? I think that Avalon Hill had a system (the same?) as well.
SPI's system was based on a one-up number for the hex column and a one-up number for the hex row on each map (and if you had multiple maps, they would usually be given a unique identifier, such as a letter of the alphabet ("map H") or something similar ("NW map"). Thus, each hex would have a unique number. For example, hex B2327 was the hex in the 23rd column on the 27th row of map B. Made it very simple.

Avalon Hill's system was to label each diagonal row with a letter (if necessary going into double letters; e.g.; "AA"), and each column with a one-up number. Thus, you would have something like "N15" as a location identifier. Again, relatively simple, though sometimes it was easy to get confused as to what precise letter applied to a given hex...

 12-09-2018, 04:55 AM #8 XRaysVision   Join Date: Jul 2018 Re: What are your map coordinates? Yeah, JLV, the SPI system is *very* simple and easy to use. I would recommend anyone who is trying to PBeM, use this for their arenas. In fact, it would be nice if SJG would “endorse” a the use a coordinate system to facilitate PBeM. My preference would be the SPI system and clockwise numbering of hex sides. This would allow for precise position and facing in a simple, short code: The counter is located on Map A in column 2, row 4, and facing hex side 1 would be annotated as A020401. This also allows a complete textual description of the map itself as all that would be needed to describe the shape of a map is a list of hex numbers. For instance a 50 hex “square” arena might be described as simply as 0000-5050, obstacles, dropped objects, bodies, etc would be could also be easily located. Once the map was established, either Play By eMail (PBeM) or Play By Text Message (PBTM) would be super fast and simple. This is a great thread! I have a friend in Maryland (I’m in Georgia) with whom I’d like to try this out.

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