﻿ DEMIX 10K Tiles

# DEMIX 10K Tiles

This is a system of nominally 10 km tiles covering the entire world.  The actual spacing is in arc minutes, and each 1x1 degree tile on earth is divided into 10-100 subtiles

Table 1.  Tile dimensions by latitude zone

 Zone abs(Lat) Tile size (arc min) Tiles per 1 degree 1"x1" Points per tile 6 85-90 60x6 1x10 3600x360 5 80-85 30x6 2x10 1800x360 4 70-80 20x6 3x10 1200x360 3 60-70 12x6 5x10 720x360 2 50-60 10x6 6x10 600x360 1 0-50 6x6 10x10 360x360

The letters used for the subtiles exclude N/S and E/W because those are used for the 1 degree tile names, and I/O because they can be confused for 1/0
• LongLetters  = ('A','B','C','D','F','G','H','J','K','L') and increase from west to east
• LatLetters = ('M','P','Q','R','T','U','V','X','Y','Z') and increase from south to north
Tile Naming: [N,S]yy[LatLetter] [W,E]xxx[LongLetter]
In MICRODEM, create a shapfile with the tile boundaries and names to cover any map
• Open any map
• Subset & zoom
• If you want the entire world, open one of these:
• Cartography, DEMIX 10K Tiles
• The shapefile will be in the temporary directory
• To save, Report, Zip shapefile or Copy shapefile to store permanently

Last revision 7/27/2022