Colour by...

[Wilfremed Kane]

Hi Olly,

Thanks for your reply.

Ok, I understand what you say about mixing how to present the data with
data itself... But could there be a way to do it in the same way you colour
by date, survey etc.?  Because in those cases colour is determined by the
"data itself"

Thanks,
R

El jue, 13 feb 2025, 21:08, Olly Betts <olly at survex.com> escribió:

> On Thu, Feb 06, 2025 at 10:14:01AM +0100, Wilfremed Kane wrote:
> > Hi, I am a Survex user since long ago, and wanted to ask about the
> "colour
> > by" options. All the 9 options are ok, but there is one, I think very
> > usefull, I miss, or don´t know the way to use it (if it´s available):
> Have
> > the option, in the text file, to determine the colour in each survey
> > -*begin / *end- (i.e. *colour green)
>
> That would be mixing how to present the data with the data itself, we
> we have tried to avoid doing in Survex.
>
> To see why this sort of approach is limiting, say you want to colour all
> the surveys found via particular entrances a different colour so you
> add `*colour green`, etc.  However you may also want to be able to view
> in aven with the main route through the cave coloured differently to
> other surveys.  Embedding colouring information directly in the survey
> data means that to have multiple colourings you need to have multiple
> copies of the survey data, and then you have the problem of making sure
> that the copies of the data remain in step when updates are made.
>
> Having the colouring information as a separate layer to the data means
> you could have as many colourings as you wanted.  Also colours could be
> set from aven with a GUI colour picker, rather than having to limit to
> a short list of named colours or requiring users to enter RGB triplets.
>
> There isn't such a feature currently though I'm afraid.
>
> You can "Colour by Survey" which sets a different colour for each
> survey but without any way to control the colours (for the technically
> curious, it's implemented by calculating a numeric hash from the survey
> name and converting the hash to a colour in HSV-space with the full
> range of hue, saturation >= 50% and value 90%).
>
> Cheers,
>     Olly
>