I see it too now. I have not realised you could include just a
centreline in the map. It shows every survey station and leg in the
cave, rather than just those included in scraps right? When I add that
my altitude baseline is set to 0m like yours using 5.3.16

I've not done this before as I had assumed I could only see survey
sections which were drawn in scraps. I can see how it is useful to be
able to render centrelines and stations for the entire system
regardless.

Footleg

On 7 January 2015 at 18:41, Bruce <bruce at tomo.co.nz> wrote:
>>Or maybe I am not understanding what you mean by including the centreline
>> in the map
>
>
>
> Like this
>
> map DeckExtensionPlanMap -title "The Deck Extension<br>Upper
> Levels<br>Middle Earth Cave<br>Greenlink System"
>
>  …
>
>              36-BigWednesdayPlan at MiddleEarth
>
>  36-BigWednesdayPlanCL at MiddleEarth
>
> …
>
> end map
>
>
>
> where the contributory maps look like this…
>
>
>
> map 36-BigWednesdayPlanCL -title "36-BigWednesday centreline Plan"
> -projection plan
>
>   36 #centreline survey
>
> endmap
>
>
>
> map 36-BigWednesdayPlan -title "36-BigWednesday Plan" -projection plan
>
>   36-BigWednesdayPlan-s1 #scraps
>
>   36-BigWednesdayPlan-s2
>
> endmap
>
>
>
> So what it is looking like, if the contributory maps are all derived from
> scraps (or maps in turn derived from scraps), then the altitude range is
> correct.
>
> But if there is a map that is centerline derived (ie has no scraps) then the
> altitude minima is set to zero.
>
>
>
> One other thing.
>
> All my tests so far use survex for loop closure.  I have not tried using
> Therion loop closure.
>
> And all my files are native Therion files – no survex imports.
>
>
>
> Bruce
>
>
>
> ________________________________
>
> From: therion-bounces at speleo.sk [mailto:therion-bounces at speleo.sk] On 
> Behalf
> Of Marco Menchise
> Sent: Thursday, 8 January 2015 3:05 a.m.
> To: List for Therion users
> Subject: Re: [Therion] Altitude colors range
>
>
>
> I checked and I can confirm what Bruce is saying. If you don't include
> centerline in map, the altitude range is correct.
>
>
>
> If you hide the centerline in the layout (leaving it in the map) the
> altitude range keeps starting from 0 m.
>
>
>
> Marco
>
>
>
>
>
> On Wed, Jan 7, 2015 at 2:52 PM, Footleg <drfootleg at gmail.com> wrote:
>
> I am not seeing this Bruce. I just tested with 5.3.16. My survey imports the
> centreline from a Survex .3d file however, so that might make a difference?
> Or maybe I am not understanding what you mean by including the centreline in
> the map. I turned off the centreline using 'symbol-hide line survey'. If I
> comment that out in my layout then the centreline is drawn in the map, but
> my altitude range still covers only the range of my scraps.
>
>
>
> Footleg
>
>
>
> On 5 January 2015 at 22:40, Bruce <bruce at tomo.co.nz> wrote:
>
> OK, the problem is not the previews or the offsets, as it occurs in the map
> examples below regardless of presence of previews or offsets.
>
> What does seem to control whether the altitudes start at zero meters is
> whether the map definition includes a survey centerline.
>
> If part of map definition includes a survey centerline, then altitudes are
> coloured from zero meters to survey maxima (a bug?).
>
> If map definition has no survey centerline as part of it’s definition, then
> coloured from survey minima to survey maxima (correct behaviour).
>
> Hence I find this behaviour manifests in maps in progress, but when they are
> finished and I (usually) turn off the centerline maps, they correct
> themselves.
>
>  Bruce
>
>
>
>
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