Well, as you have noticed, map selection and survey selection are completely independent - even map selections are independent between projections. With exception of maps, everywhere else survey selection is used.<br><br>Do you have some idea, how to solve this discrepancy? Normally, just survey selection could be enough. But then there need to be specified the map - that need to be shown, when this survey is selected (link survey - map). But then you will loose a possibility to export all scraps from given survey if some of them will not be included in that map.<br>
<br>Or the other way - discrepancy between lengths in 2D and 3D could be solved by adding a link from map to survey. Which way would you prefer? For me, probably the second one is better. If there will be link from map to survey - than this survey could be selected, when a map is selected and length/depth from this survey could be taken into account.<br>
<br>Best regards, S.<br><br><div class="gmail_quote">On 17 November 2010 09:26, Bruce <span dir="ltr"><<a href="mailto:dangle@tomo.co.nz">dangle@tomo.co.nz</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<br>
OK, I tried it.<br>
Selected a map containing a few caves, and a single survey, a small part of<br>
one of those caves in one of my datasets. The 2d pdf map produced a cave<br>
and reported 12km and the lists and 3d model in the same thconfig run<br>
reported a single survey of 45m.<br>
<br>
I see now it has always been this way, but was not what I had assumed for<br>
all these years. (One can never read the Therion book too carefully).<br>
<br>
It also explains the discrepancy in reported cave lengths between 2d pdf<br>
maps and the list outputs. If there are no scraps for a short length of<br>
survey, then the 2d pdf map does not report that portion of the cave length.<br>
<br>
This means that, assuming the surveys and maps are decoupled as is one of<br>
the supposed advantages of Therion (and I agree it is), it is therefore NOT<br>
usually possible to get a comprehensive set of outputs (2d pdfs, 3d models,<br>
lists of caves, continuations and surveys) that relate to a particular<br>
discrete SUBset of data (It is however possible to get these for the ENTIRE<br>
dataset at any level, but if the global effect of loop closures is to be<br>
accounted for at a lower level the outputs are unlikely to represent a<br>
consistent portion of the cave-unless map objects and surveys join at the<br>
same places).<br>
<br>
I agree Andrew, it would be good to select a map object and have all types<br>
of output refer to drawings and centrelines contained in that map object.<br>
It is the behaviour I was incorrectly assuming, and the inevitable<br>
discrepancies I had been putting down to bugs either in Therion or my<br>
haphazard data organisation.<br>
The reverse currently happens when a survey is selected I think. Ie all<br>
scraps are exported for selected surveys. This does not allow passage<br>
previews and offsets though.<br>
<br>
Martin, Stacho,<br>
Should/could Therion produce such synchronised outputs where maps are<br>
selected, or should the users have to make the boundaries of their map<br>
objects match survey junctions at key locations to enable them to get<br>
consistency between map based outputs and survey based outputs? The later,<br>
status quo, is workable, but seems to make it difficult for the user and<br>
make interpretation of output statistics quite onerous.<br>
<br>
So if I were to suggest a specific change it would be that when maps are<br>
selected, only data relating to survey legs contained within selected maps<br>
would be exported.<br>
<br>
Or am I missing something?<br>
Comments?<br>
<br>
Regards<br>
<font color="#888888">Bruce<br>
</font><div><div></div><div class="h5"><br>
-----Original Message-----<br>
From: <a href="mailto:therion-bounces@speleo.sk">therion-bounces@speleo.sk</a> [mailto:<a href="mailto:therion-bounces@speleo.sk">therion-bounces@speleo.sk</a>] On Behalf<br>
Of Andrew Atkinson<br>
Sent: Wednesday, 17 November 2010 6:56 a.m.<br>
<br>
Your suggested solution, is what I do, for 3d, and it works, but I have<br>
not used lists yet. However, it would be nice to be able to select a map<br>
and only get a centreline with this would be good, but I suspect too<br>
much work for it to be worth while. (plus lots of decisions about what<br>
exactly would appear in the output<br>
<br>
Andrew<br>
<br>
On 16/11/10 09:08, Bruce wrote:<br>
> My reading of the Therion Book suggests to me;<br>
><br>
> - that 'source' specifies the files that Therion should read and process<br>
> before deciding what to export. The source files should contain or<br>
> reference surveys and or a surface.<br>
><br>
> - that 'select' chooses which survey(s) and or map(s) from the above<br>
> files to export. If there is no 'select' statement then 'all' are<br>
exported.<br>
><br>
> My interpretation #1 is that this should allow all the surveys of a<br>
> large (or modest) system of cave passages to be referenced by way of<br>
> 'source' so that all the survey loop and scrap join distortions can be<br>
> processed BEFORE Therion decides what to export. This is what seems to<br>
> occur. So far, so good.<br>
><br>
> My interpretation #2 is that when a map or maps for any particular<br>
> projection is 'selected' then ONLY the data that relates to those maps<br>
> should be exported. This is what seems to happen for Map outputs (pdf<br>
> and ?kml) and Atlas outputs.<br>
><br>
> I have some difficulty and confusion with outputs that don't have a<br>
> projection, such as the lists, 3d outputs and database. What seems to<br>
> happen is that regardless of the 'selected' maps, all of the 'sourced'<br>
> data is exported to this type of output.<br>
><br>
> What I would like is that only the data related to the 'selected' maps<br>
> are exported. This way all subset outputs can be consistent (same loop<br>
> closure distortions applied), and separately exported.<br>
><br>
> In writing this out I suspect I may have realised the answer to my<br>
> question (but not yet tested it). Perhaps what I need to do is 'select'<br>
> survey(s) that encompass the same part of the cave as the maps?<br>
><br>
> Any insights or clarifications gratefully received.<br>
><br>
> Bruce<br>
<br>
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