Survex 1.4.6 released

[Olly Betts]

On Thu, Mar 07, 2024 at 12:31:47PM +1300, Olly Betts wrote:
> - Use specified datum and UTM zone.  Currently only datum "WGS 1984"
>   is handled here. Other datums could be handled, but the mapping to
>   EPSG code is less simple.  Also it seems Compass supports at least
>   24 datums but it doesn't document all the strings it uses for them.

Sorry, this part of the NEWS entry was wrong - we actually support most of
the datums Compass does.  It's correctly documented in the manual:

    Survex handles the UTM zone and datum provided the combination can be
    expressed as an EPSG code. Example Compass files we've seen use "North
    American 1927" outside of where it's defined for use, presumably because
    some users fail to change the datum from Compass' default. To enable
    reading such files we return a PROJ4 string of the form "+proj=utm ..."
    for "North American 1927" and "North American 1983" for UTM zones which
    don't have an EPSG code. Please let us know if support for additional
    cases which aren't currently supported would be useful to you.

I've tested with DAT, CLP, MAK, PLF and PLT files from
https://www.cave-registry.org.uk/ and also the samples that come with
Compass, but there are features that none of these exercise so please
report if something doesn't seem to be working properly.

Cheers,
    Olly