mapbox / mapbox/vector-tile-spec

Support multiple values for tags and opaque tag byte tag values.

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Description

Not all tags naturally have a single value, so for MVT3 it'd be nice to support repeatedly specifying the same tag and different values for it. The client could decide to expose this in a couple of ways. Alternatively repeated fields could be one of the optional tag types.

Also, it'd be nice to have an optional bytes tag value that could hold some application-specific encoding of data (e.g. another protobuffer).

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reviewing the existing MVT tag model and any MVT3 specification material. Define how repeated values and opaque byte values should be represented, exposed, and encoded; done means the specification records a settled design and its compatibility expectations.

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Assessment

Domain
data
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
25/100

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