6.1.5 Reference to i dimension

As reported by Carl:

In clause 6.1.5 is the sentence:

The solution consists of reducing the number of tiles (matrixWidth) in the high latitude rows and generating those tiles with a compressed scale in the i dimension (see Figure 5).

Checking Figure 5, there is no reference (label) to the "i dimension".

And additional observations from myself:

Could we simply refer to the dimension as the "longitudinal dimension" or similar term to avoid confusion in 6.1.5? Is this a result of Figure 5 that was updated, or shifted figure numbers and the reference should now be to Figure 7?

There are references to 3 discrete indices i, j, and tile matrix identifier in section 6.1.4 and in Figure 7.

6.1.4 also has this sentence:

In a two-dimensional space, a tile is identified by 5 discrete indices that are named: tile row, tile column, tile matrix identifier, i and j.

That doesn't sound right to me, a tile can be identified only by the 3 indices tile matrix, tile row and tile column. Should this be saying cell rather than tile?

In this 6.1.4 section, it seems that i and j are used for 2 completely different meanings:

In the first bullet, i and j seem like coordinates inside a single tile
In the second bullet, i and j seem like coordinates inside a whole tile matrix

Figure 7 seems to illustrate the first bullet with a) and the second with b), but the figure for b) calls coordinate i' and j'. It would be helpful to replace the bullets by a) and b) if that is the case, and be consistent about i vs. i'.

opengeospatial / 2D-Tile-Matrix-Set

6.1.5 Reference to i dimension #68