bbox.yaml constaints only work for CRS84

[rouault]

https://raw.githubusercontent.com/opengeospatial/WFS_FES/master/core/openapi/parameters/bbox.yaml defines -180/180 as the min/max for bbox values. That won't work for default CRS that aren't geodetic ones.

[cportele]

It currently is like that since the only CRS supported by the Core is WGS84 lon/lat. But of course whatever we specify in the Core must be compatible with extensions that support other CRSs. If we want to make it work in general beyond WGS84 lon/lat we need to remove maxItems: 4 and the minimum/maximum - and clarify how to specify the CRS.

[ilkkarinne]

+1 for generalizing the BBOX to support other CRSes that CRS84, but defaulting to CRS84. I would also like to see placeholder to giving the crs ID as an optional parameter, even if the Core services are not required to support it

[cportele]

See pull request #94.

I removed the minimum/maximum values and changed maxItems to 6 to prepare for other CRSs. bbox-crs has been reserved for a parameter in the CRS extension to specify a different CRS for the BBOX values (I have made it a separate parameter so that bbox can still be an array of numbers).