Comments (1)
The following text has been added and modified in the section defining the WKSS:
When overlaying and presenting together tiles encoded in different tile matrix sets that do not have common sets of scale denominators and the same CRS in an integrated client, rescaling or re-projecting tiles to the common scale of the view might require re-sampling calculations that result in visual quality degradation.
The recommended way to prevent this problem is make use of the same global tile matrix sets, for example, one of the avialable in <>. If the coverage of the data covers only a part of the tile matrix set area, The tile matrix limits that can be used to inform about this limitations.
If using the same tile matrix set is not possible, using a common coordinate reference system and a common set of scales shared by as many layers and services as possible can also be a solution. Thus, the concept of well-known scale set (WKSS) is introduced.
Note that a WKSS only defines a small subset of what is needed to completely define a Tile Matrix Set. A WKSS is an optional feature that does not replace the need to define the Tile Matrix Set and its Tile Matrices. The original purpose of WKSS is no longer necessary if services share and reference common Tile Matrix Sets definitions such as the ones in <>.
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Related Issues (20)
- Remove tileMatrixSetDefinition left-overs (Req 17, JSON Schema description)
- should `id` and `uri` be WGS1984Quad HOT 2
- Clarify history of TMS URNs and URLs
- Pizel is pixel
- 5.3.2. Description, Title and Keywords HOT 1
- Section 8.2.1 HOT 1
- 6.1.5 Reference to i dimension HOT 1
- Change spec element URI in Clause 5 HOT 1
- Fix dependency URI in Clause 6.2.1 HOT 1
- Variable width conformance class is missing from Section 2 - Conformance HOT 1
- Consider including tileMatrix.json in Annex F
- Consider adding `Version` in the schema HOT 1
- Stable URL for tile matrix sets HOT 3
- 2D TileSet Metadata UML diagram typos
- TileSet metadata: Minimum bounding rectangle surrounding the **tile set**, not Tile Matrix Set
- (Variable Width) Clarify canonical and alias tiles in Section 6.1.5 HOT 3
- Clarification for CRS wkt type HOT 6
- Update xsi:schemaLocation
- Add Switzerland 2D (custom) Tile Matrix Set definition to the registry HOT 2
- Add the default cornerOfOrigin/CornerOfOrigin to the 2DTMS in the registry
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