Re: [Therion] Need help producing scraps.kml without white blobs

[Martin Sluka via Therion]

Yellow tick indicate “the air”. 

M. 

Odesláno z iPhonu

19. 4. 2021 v 21:52, Bruce Mutton :

> Hi Michael
> Unless Stacho's magic fixes your problem, I would expect that it is most
> likely that the yellow tick marks do not point inside of the passages in all
> cases, or -outline in/out is not set correctly.  Your example image is
> exactly the sort of thing that first time kml users produce.  It is very
> common.
> There should not be any problem with many short wall lines, except that with
> many, there is more opportunity to get a yellow tick or -outline wrong.
> 
> A couple of months ago I encountered a case where ends of two adjacent
> scraps were one above the other, and one of them was well rendered, and the
> other as in your example.  Turned out that both scraps were drawn correctly
> and simply moving one of the end lines a bit fixed the problem.  Have never
> encountered that before as far as I know, and I would expect that this is
> unlikely to be your problem.
> 
> Have a look at
> https://therion.speleo.sk/wiki/tips#avoiding_invisible_or_misshapen_scraps_i
> n_loch_and_google_earth It is a bit outdated now, as I think the behaviours
> are different now, but it gives you an idea of what to look out for.
> 
> When troubleshooting this sort of thing, also produce pdf outputs with a
> passage foreground colour.  This can point to problems with gaps between
> scraps and incorrect yellow ticks (interior of passage), but will not
> identify -outline errors (because the pdf generator seems to reliably know
> better than the user!)
> 
> Bruce
> 
> 
> -Original Message-
> From: Therion  On Behalf Of Michael Ross
> Sent: Tuesday, 20 April 2021 02:20
> To: therion@speleo.sk
> Subject: [Therion] Need help producing scraps.kml without white blobs
> 
> Hello there,
> 
> I "own" a fairly large dataset of a maze cave.
> Producing PDF output works well,
> but when producing kml using
> 
>  export map -projection plan  -output Scraps.kml
> 
> I get large white blobs where there should be transparency. See attachment.
> 
> First assumption was that Therion needs some help by marking certain walls
> "outline in".
> But that didn't help.
> 
> Then I tried redrawing the walls of the affected passages to get long lines
> of walls rather than concatenated short sections of walls, assuming that
> would help Therion to better understand.
> Didn't help.
> 
> Anyone had this problem so far?
> 
> If there is a way to post-process the kml file to remove the white areas,
> that would also help.
> 
> Or any other hint to systematically track this down.
> 
> Kind Regards,
> Michael
> 
> 
> 
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[Therion] XVI output misaligned (rotated) from original TopoDroid sketches

[Paul Rowe]

Hi,
I'm just trying out TopoDroid for the first time as the source for scraps
in Therion. I can view the th2 scraps in Therion and can see the stations
and splays.

However, if I then output to XVI and add the XVI as a background image in
Therion, the XVI is misaligned. The scale is correct and I just manually
move the background XVI image to line up with one of the stations in the
scrap. The XVI layer is rotated slightly (1 or 2 degrees) and then doesn't
line up across the rest of the sketch imported from TopoDroid.

Has anyone run into this? I thought it might be a difference between true
north and grid north, but exporting to XVI with north set to true or grid
doesn't fix the issue.

The XVI layer isn't strictly necessary as the stations and splays are
already visible in the TopoDroid sketch output. It does make me worry that
there's some underlying problem though that I need to fix.

Thanks,
Paul Rowe
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[Therion] Need help producing scraps.kml without white blobs

[Bruce Mutton]

Hi Michael
Unless Stacho's magic fixes your problem, I would expect that it is most
likely that the yellow tick marks do not point inside of the passages in all
cases, or -outline in/out is not set correctly.  Your example image is
exactly the sort of thing that first time kml users produce.  It is very
common.
There should not be any problem with many short wall lines, except that with
many, there is more opportunity to get a yellow tick or -outline wrong.

A couple of months ago I encountered a case where ends of two adjacent
scraps were one above the other, and one of them was well rendered, and the
other as in your example.  Turned out that both scraps were drawn correctly
and simply moving one of the end lines a bit fixed the problem.  Have never
encountered that before as far as I know, and I would expect that this is
unlikely to be your problem.

Have a look at
https://therion.speleo.sk/wiki/tips#avoiding_invisible_or_misshapen_scraps_i
n_loch_and_google_earth It is a bit outdated now, as I think the behaviours
are different now, but it gives you an idea of what to look out for.

When troubleshooting this sort of thing, also produce pdf outputs with a
passage foreground colour.  This can point to problems with gaps between
scraps and incorrect yellow ticks (interior of passage), but will not
identify -outline errors (because the pdf generator seems to reliably know
better than the user!)

Bruce


-Original Message-
From: Therion  On Behalf Of Michael Ross
Sent: Tuesday, 20 April 2021 02:20
To: therion@speleo.sk
Subject: [Therion] Need help producing scraps.kml without white blobs

Hello there,

I "own" a fairly large dataset of a maze cave.
Producing PDF output works well,
but when producing kml using

  export map -projection plan  -output Scraps.kml

I get large white blobs where there should be transparency. See attachment.

First assumption was that Therion needs some help by marking certain walls
"outline in".
But that didn't help.

Then I tried redrawing the walls of the affected passages to get long lines
of walls rather than concatenated short sections of walls, assuming that
would help Therion to better understand.
Didn't help.

Anyone had this problem so far?

If there is a way to post-process the kml file to remove the white areas,
that would also help.

Or any other hint to systematically track this down.

Kind Regards,
Michael



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Re: [Therion] Need help producing scraps.kml without white blobs

[Stacho Mudrak]

Hi Michael,

I have found one issue with the current version of Google Earth - it was
ignoring (not filling) polygons, where the last point was not equal to the
first point.

It is fixed in18eca78
,
but I am not sure, it if will fix your issues.

S.


On Mon, 19 Apr 2021 at 16:44, Stacho Mudrak  wrote:

> Hi Michael,
>
> it looks to me like it is some kind of inner/outer ring problem. Are you
> able to isolate and post some minimal sample, where this problem happens?
> It would help a lot.
>
> Thanks, S.
>
> On Mon, 19 Apr 2021 at 16:26, Michael Ross 
> wrote:
>
>> Hello there,
>>
>> I "own" a fairly large dataset of a maze cave.
>> Producing PDF output works well,
>> but when producing kml using
>>
>>   export map -projection plan  -output Scraps.kml
>>
>> I get large white blobs where there should be transparency. See
>> attachment.
>>
>> First assumption was that Therion needs some help by marking certain
>> walls "outline in".
>> But that didn't help.
>>
>> Then I tried redrawing the walls of the affected passages to get long
>> lines of walls rather than
>> concatenated short sections of walls, assuming that would help Therion to
>> better understand.
>> Didn't help.
>>
>> Anyone had this problem so far?
>>
>> If there is a way to post-process the kml file to remove the white areas,
>> that would also help.
>>
>> Or any other hint to systematically track this down.
>>
>> Kind Regards,
>> Michael
>>
>>
>> ___
>> Therion mailing list
>> Therion@speleo.sk
>> https://mailman.speleo.sk/listinfo/therion
>>
>
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Re: [Therion] Need help producing scraps.kml without white blobs

[Stacho Mudrak]

Hi Michael,

it looks to me like it is some kind of inner/outer ring problem. Are you
able to isolate and post some minimal sample, where this problem happens?
It would help a lot.

Thanks, S.

On Mon, 19 Apr 2021 at 16:26, Michael Ross  wrote:

> Hello there,
>
> I "own" a fairly large dataset of a maze cave.
> Producing PDF output works well,
> but when producing kml using
>
>   export map -projection plan  -output Scraps.kml
>
> I get large white blobs where there should be transparency. See attachment.
>
> First assumption was that Therion needs some help by marking certain walls
> "outline in".
> But that didn't help.
>
> Then I tried redrawing the walls of the affected passages to get long
> lines of walls rather than
> concatenated short sections of walls, assuming that would help Therion to
> better understand.
> Didn't help.
>
> Anyone had this problem so far?
>
> If there is a way to post-process the kml file to remove the white areas,
> that would also help.
>
> Or any other hint to systematically track this down.
>
> Kind Regards,
> Michael
>
>
> ___
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> Therion@speleo.sk
> https://mailman.speleo.sk/listinfo/therion
>
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