Return tilejson

[pnorman]

The data.xml for Mapnik includes information for returning a tilejson

That JSON fragment doesn't include all the information needed for a tilejson, but other parameters provide the name, min/max zoom, center. The required "tiles" key may need another command line option, since that varies depending on the hostname, and if you are accessing it remotely, localhost doesn't work.

To-do:

• Can we get the parameters from Mapnik, or do we parse the XML ourselves?

mapbox/tilejson-spec#14 has some examples of the format, since it's not formally documented

[zerebubuth]

Do we consider this fixed? There's still some stuff (descriptions, comments, etc...) missing from the TileJSON. Do we want to include those and, if so, do we have a source we can get them from?

[pnorman]

description works if the XML has a description set.

center looks to be the one that remains an issue with avecado echoing the string from the XML when the JSON should have an array. bounds is probably the same, but doesn't show up in world-wide testing.

[zerebubuth]

What do you reckon the best thing to do is? Put the contents of bounds and center in verbatim, which is easy but might mean producing invalid JSON? Or put some code in there to parse the arrays of numbers and verify their validity?

[pnorman]

currently center is repeated verbatim, and produces valid json but invalid tilejson.

The right thing to do is create an array out of the string in the XML. On the other hand, I'm not sure it actually matters, given that I've yet to find a workflow that actually relies on bounds or center.

[pnorman]

MBS relies on a valid center.