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Andrea Aime created an issue |
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OGC API Tiles could set headers informing client about empty areas and solid areas |
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27/May/21 1:03 PM |
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Medium|
From the spec: If a requested tile is empty (no data) and all tiles within its extent at all more detailed zoom levels (tile matrices) are guaranteed to also be empty, the response header SHOULD include OATiles-hint: empty. and: If a requested tile is full (e.g. the inside of a polygon for vector features, a solid color for a map, or a grid completely filled with the same value for a coverage) and all tiles within its extent at all more detailed zoom level (tile matrices) are guaranteed to also be identically full, the response header SHOULD include OATiles-hint: full. Not a requirement, but a nice to have. Would require saving some meta-information at the tile level, I suppose. It’s not the same as not returning data for an empty tile, these headers guarantee empty/solid content for all subsequent zoom levels too, different logic is needed to determine the situation. |
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