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The romers on a compass

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chris tan 21 Oct 2003
I have noticed that some foreign maps have rectangular GPS type grids on them instead of the 1km=?cm squares.

Does any one know of a compass that has a corresponding romer for GPS grids.
O Mighty Tim 21 Oct 2003
In reply to chris tan: Are these a consistent distance apart? I thought GPS was geometry based, rather than a fixed, physical distance?

Tim, TG
OP chris tan 21 Oct 2003
In reply to O Mighty Tim:

Yup looks like constant rectangles to me, marked with Long & Lat.
DC 21 Oct 2003
In reply to chris tan

The distance between 2 lines of latidue varies depending on how far from the equator you are.

So 50 degree's North - 51 degree's North is different in distance on a map / chart to 60 degree's North - 61 degree North's.

A romer would therefore be ineffective.

Search for mapping projections and mercator on the net for all the in's and out's. It's basically do to with converting a curvered round surface such as the earth onto a flat/square piece of paper such as a map.
In reply to chris tan:

Err...I agree with Tim here. I can't see how, on a complete mapping series, you could have consistent lat/long grid, at least assuming the map uses a fixed scale.
 sutty 22 Oct 2003
In reply to chris tan:

On some OS maps with not much detail they sometimes add them. They may be on most maps, I know the LAT/LONG is on the sides.
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