#164: Simple Geometries in CF
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Reporter: whiteaker | Owner: cf-conventions@…
Type: enhancement | Status: new
Priority: medium | Milestone:
Component: cf-conventions | Version:
Resolution: | Keywords: geometry
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Comment (by whiteaker):
There's a requirement in the proposal such that if a coordinates attribute
is carried by the geometry container variable, then those coordinate
variables which correspond to node coordinate variables must also have the
axis attribute. I think this was originally put in place because David
Hassell requested it for conformance or data model reasons. Since then,
David has requested to me that instead of requiring the axis attribute on
the coordinate variables, we instead include a bounds attribute pointing
to the node coordinate variables. The node coordinates serve as the
bounds for coordinate variables. For example, if features are represented
as polygons with node coordinates x and y, and the centroids of those
polygons with coordinates lon and lat, then the lon coordinate variable
would have a bounds attribute naming the x node coordinate variable.
Notwithstanding any objections, I'll update the Pull Request to the
conventions in GitHub to reflect this change. I will also update the
conformance pull request to reflect this and some other non-breaking
changes requested by David.
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Ticket URL: <https://cf-trac.llnl.gov/trac/ticket/164#comment:22>
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