Improve NetCDF coordinateAxis unit management (km conversion)

Description

Right now, the NetCDF CRS parsing machinery automatically converts x/y coordinates expressed in km (so with units=km) to meters. Moreover, the custom CRS built on top of the grid mapping properties is also setup with coordinate axis in meters.
Let's support a parameter to enable/disable this automatic conversion so that we can natively support km coordinates and expose a CRS with km axis.

Environment

None

Status

Assignee

Daniele Romagnoli

Reporter

Daniele Romagnoli

Triage

None

Components

Fix versions

Priority

Medium
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