[Therion] Selective display of survey lines

Footleg drfootleg at gmail.com
Wed May 21 03:24:59 CEST 2014


I would certainly suggest that some sort of diveline symbol is used, as
that is really what you are wanting to indicate. Then you can turn off all
survey lines (which just happen to correspond to the dive line position in
this case).

Footleg
On 20 May 2014 22:24, "Steve Clark" <sbc23 at cantab.net> wrote:

> On a related note to Alvaro's questions regarding show and hide of survey
> lines, I'm looking for some advice on the best way to handle the selective
> displaying of some survey lines, but not others.
>
> We have a project surveying a mainly submerged (diving) cave. The vast
> majority of our survey stations and connecting lines are an actual
> continuous physical line in the cave (say 300 stations). Some stations
> (maybe 50) do not have physical lines connecting them (e.g. gaps/jumps in
> the line and dry disto survey).
>
> We would like to be able to :
>
> 1. Produce a map with with no lines at all (seems easy, use 'symbol-hide
> line survey' & 'symbol-hide point station' )
> 2. Produce a map with only the physical lines shown, but not the other
> survey lines. This is as a resource for divers to show the line
> configuration and navigation etc. but not the other survey information.
>
> What is the best way to achieve 2? I've considered making a user-defined
> line type 'u:caveline' and drawing it in all the scraps where submerged
> line exists. Then hide all survey lines and stations. This would be
> laborious but may give most flexibility.
>
> Is this the best way or can anyone suggest an alternative approach?
>
> Regards,
>
> Steve Clark
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