[Therion] preview above/below in elevation maps? --> map-level selection problem

[Xavier Pennec]

Hi Bruce, I'm happy to be a distraction in the Middle-Earth survey :-) 
Are you somehow approaching the end of this survey? I guess we should 
hope the contrary, and that the cave should always continue a bit (or 
rather a lot) further.  Say hello to Michael for me.

Thanks for your answer, that was very helpful to better identify the 
problem. I'm using 5.3.15 so everything should work similarly for me. 
Actually offset is working properly (I did not thought of trying that) 
but I discovered that the behavior of preview above/below is dependent 
of the number of layers of maps.


My map with the preview is very similar to yours:
     map Coupe300_StFrancois
         title "Pous RG16 - Quartier Saint-Francois<br>Coupe 300 degrés"
         projection [elevation 300 deg]
         Coupe300_StFrancoisDepilage
         # Coupe300_StFrancoisTBP4 [0 10 m] below ## working properly if 
uncommented
         preview below Coupe300_StFrancoisTBP4 # here is the problem
      endmap

If I select this map (select Coupe300_StFrancois at PousRG16) in the 
thconfig, then I got the expected behavior as in your case (file 
Coupe300_StFrancois.pdf). However, this map is normally recombined with 
other projection maps to draw the complete elevation, as done below:
     map Coupe300
         title "Pous RG16 - Coupe 300 degrés"
         projection [elevation 300 deg]
         # Here could be another map
         Coupe300_StFrancois
     endmap
Selecting this higher level map (even with no other maps included as 
here) does not display the preview (file Coupe300.pdf).

However it is said in the Thbook that "Preview is displayed only if the 
map is in the map-level level as specified by the select command. Use 
the revise command if you want to add maps from higher levels to the 
preview."  And indeed, when I use "select Coupe300 at PousRG16 -map-level 
2" in my thconfig file, then the preview is displayed.  The map-level 
apparently seems to have to match exactly the number of layers 
(-map-level 3 or more does not display it) while I would have expected 
that all maps up to a certain level would be shown.

I am  wondering what is the underlying reason for this behavior and if 
anyone would have an example of the use of the "revise" command to  
overload the behavior (I have to admit that the revise command remains 
pretty obscure to me).


Xavier



Le 16/06/2014 04:11, Bruce a écrit :
>
> Hi Xavier
>
> Have just finished cleaning my caving gear after caving two days with 
> Michael and others.  Your message a nice distraction from the job of 
> actually drawing the weekends surveying!
>
> Michael has been using previews and offsets for elevation maps for 
> some time.
>
> I checked just now, and it is working with 5.3.15, and presume it must 
> have been fine with 5.3.14 and earlier.
>
> The example here includes statements like these to create the map 
> definition;
>
>   map DeckExtensionElev290   \
>
>   -title "Middle Earth Cave Deck Extension Passages<br>Elevation 
> looking 290 deg" \
>
>   -projection [elevation 290 deg]
>
>   preview below MiddleEarthElev290Map
>
> DD-SandyWayElev290 at MiddleEarth [-300 000 m] above
>
>   #etc
>
> Regards
>
> Bruce
>
> -----Original Message-----
> From: therion-bounces at speleo.sk [mailto:therion-bounces at speleo.sk] On 
> Behalf Of Xavier Pennec
> Sent: Monday, 16 June 2014 9:22 a.m.
> To: List for Therion users
> Subject: [Therion] preview above/below in elevation maps?
>
> Does anyone has experience with preview above/below in elevation maps?
>
> I use it quite often in plan maps, with the expected behavior, but when
>
> I try it in an elevation map, the "previewed" map does not appear at all
>
> in my pdf neither with below or above.   I am wondering if I missed
>
> something in the intended behavior or if there is a bug in my layouts
>
> (although it does not work either if I don't load them).
>
> Thanks for your insights
>
> Xavier
>
>
>
> _______________________________________________
> Therion mailing list
> Therion at speleo.sk
> http://mailman.speleo.sk/mailman/listinfo/therion

-- 
> -------------------------
> Xavier Pennec
> Senior Research Scientist / Directeur de recherche
> Asclepios project-team, INRIA Sophia-Antipolis
> 2004 Route des Lucioles, BP93
> F-06902 Sophia-Antipolis Cedex, France
> +33 4 92 38 76 64
> +33 6 78 35 16 90
> http://www-sop.inria.fr/asclepios/
> -------------------------------

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