Grid Labeling above or below the zipper

[joebayles]

At certain latitudes or specific locations, the MGRS grid may "close the zipper", when longitudinal grid lines will merge, throwing off the grid.

In creating a reference grid from a reference system, how should the labeling iterate? My suggestion is that the widest amount of squares is numbered sequentially, and the narrower amounts of squares skip those missed numbers, so that the grid persists.

Otherwise, it looks like this:

FYI

@ArcGIS/arcgis-defense-solutions

[joebayles]

Suggest we go with option one (skip). @adgiles FYI

[adgiles]

Any suggestions on how we label in this type of area:

[Dbarnes1]

I think best practice would be to follow the convention we outlined above for the section with the zipper, and then at the upper left of the 34D section, just start with the next alphanumeric label. So from the top left of your image it would be A through I, and then there would be the break where you could start with J through M. In terms of the numbers, I think you just have to start with numbers that won't really line up. For instance, J1 won't line up with A1, but I think that's ok because the grid in this image has two distinctive parts.

[joebayles]

@adgiles