[Requests] Comments on Tile Matrix Set Candidate Standard

Stephane Garcia Stephane.Garcia at ign.fr
Thu Jul 26 10:58:24 EDT 2018


PART A


1. Evaluator:
Dimitri Sarafinof (IGN)
Dimitri.sarafinof at ign.fr

2. Submission: [OpenGIS Project Document Number, Name]

17-087r11 - Tile Matrix Set Candidate Standard

PART B

1. Requirement: [General, #]
General

2. Implementation Specification Section number: [General, #]
2

3. Criticality: [Major, Minor, Editorial, etc.]
Technical

4. Comments/justifications for changes: [Comments]
This draft proposes to standardize the way of defining tile matrix sets, but not conformance to a specific Tile Matrix set.
It may be worth it to do so (maybe only the Well Known tile matrix sets in Annex C), and defined conformance classes for these.
It would ensure conformance as soon as you use an id of the tile matrix set defined in Annex C (like http://www.opengis.net/def/wkss/OGC/1.0/GlobalCRS84Scale) for example in a WMTS, Geopackage file or any other implementation that would support tiles.

1. Requirement: [General, #]
General

2. Implementation Specification Section number: [General, #]
Annexes C and F

3. Criticality: [Major, Minor, Editorial, etc.]
Technical

4. Comments/justifications for changes: [Comments]
It would also be worth to add the levels (0, 1, 2 ) in the row of the definitions of the Tile Matrix set (in Annex C) as defined in Annex F. It would avoid confusion about Id levels sometimes.

1. Requirement: [General, #]
General

2. Implementation Specification Section number: [General, #]
6

3. Criticality: [Major, Minor, Editorial, etc.]
Technical

4. Comments/justifications for changes: [Comments]
There seems to be no requirement to start a tile matrix set definition from level 0 (identifier of the tile matrix). There should be a requirement on that (or that level 0 covers the entire globe?)

1. Requirement: [General, #]
General

2. Implementation Specification Section number: [General, #]
+ 6.1

3. Criticality: [Major, Minor, Editorial, etc.]
Editorial

4. Comments/justifications for changes: [Comments]
The fact that "Non-square pixels are not supported" (cf. Note 1 in 6.1) should appear more clearly. Proposal to state this in the scope (that in the tile space, only square pixels are supported - if understood correctly).

1. Requirement: [General, #]
Tile

2. Implementation Specification Section number: [General, #]
4.6

3. Criticality: [Major, Minor, Editorial, etc.]
Minor

4. Comments/justifications for changes: [Comments]
Relation with tessellation (ISO 19123), if any, is not clear. Consider to clarify.
Note: In GeoTIFF candidate standard (under revision by OGC), tessellation and tiling are equivalent.

1. Requirement: [General, #]
tile matrix

2. Implementation Specification Section number: [General, #]
4.7

3. Criticality: [Major, Minor, Editorial, etc.]
Minor

4. Comments/justifications for changes: [Comments]
It is unclear whether this concept / definition applies only to underlying regular grids as stated in "regular grid defined on top of a detailed raster regular grid" or also to regular and irregular grids. Consider to clarify the definition.
Note: This comment also applies to section 6.1.

1. Requirement: [General, #]
3rd sub-paragraph

2. Implementation Specification Section number: [General, #]
6.1

3. Criticality: [Major, Minor, Editorial, etc.]
Editorial

4. Comments/justifications for changes: [Comments]
typographic error in sentence "If the size of the grid spacing is small and the bounding box of the area to covert is large": change 'covert' to 'cover'

1. Requirement: [General, #]
4th line

2. Implementation Specification Section number: [General, #]
6.1.1

3. Criticality: [Major, Minor, Editorial, etc.]
Editorial

4. Comments/justifications for changes: [Comments]
typographic error: suppress the duplication of ',' (,,)

1. Requirement: [General, #]
Table 4

2. Implementation Specification Section number: [General, #]
7.2

3. Criticality: [Major, Minor, Editorial, etc.]
Editorial

4. Comments/justifications for changes: [Comments]
typographic error: change 'tileMatrixSet identifieir' to 'tileMatrixSet identifier' (1st row, 3rd column)

1. Requirement: [General, #]
Table 5

2. Implementation Specification Section number: [General, #]
7.2

3. Criticality: [Major, Minor, Editorial, etc.]
Editorial

4. Comments/justifications for changes: [Comments]
typographic error: change 'tileMatrixSet identifieir' to 'tileMatrixSet identifier' (1st row, 3rd column)

1. Requirement: [General, #]
Test Purpose

2. Implementation Specification Section number: [General, #]
A.3.1 + A.3.2

3. Criticality: [Major, Minor, Editorial, etc.]
Editorial

4. Comments/justifications for changes: [Comments]
consider add a 'in' (before Table 5) in 'TileMatrixSetLink data structureTable 5'.
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