[Therion] Therion and DEM

Pavel Herich herich at speleodd.sk
Wed Jan 23 10:48:14 CET 2019


Hi,
I do strugle with the same problem, if I understand well; partly there 
is solution tu cut all grid values after f.e. second number behind point 
(if you have values like I do - 1205.648971354 and so), you fit almost 
twice of values into the line.
I did not experiece any troubles with number of columns, so
I suppose real solution would be to extend line in Therion, but I don´t 
know, if it´s possible.
Pavel


Dňa 2019-01-23 10:25 Marco Menchise via Therion napísal(a):
> Hello,
> I'm facing same problem.
> 
> Any hint/answer?
> Thanks,
> Marco
> 
> Il giorno ven 29 giu 2018 alle ore 00:38 Xavier Robert via Therion
> <therion at speleo.sk> ha scritto:
> 
>> Dear all,
>> 
>> For a quite large project, I am using a relatively high-resolution
>> DEM (i.e. 1 px = 1 m), and I am trying to use it within Therion to
>> produce a .lox-3D file. I am however facing some problems:
>> 
>> * If I export the full resolution DEM to a .th file (6540*4307
>> cells) with the line "grid 325816.2990788577 5106250.599820679 1 1
>> 6540 4307 ». I have the error « therion: error -- dem.th [1] [14]
>> -- line too long ». This line 14 correspond to the first row of the
>> DEM. ASC parameters are « #NCOLS = 6540, NROWS   = 4307, XLLCORNER
>> = 325816.2990788577, YLLCORNER =5106250.599820679, CELLSIZE = 1.0 »
>> * If I export the DEM with a 5 m pixel resolution (1308*861 cells)
>> (with the line "grid 325816.299079 5106250.59982 5.001161440185831
>> 5.001161440185831 1308 861 », I get the same error,
>> * If I export the DEM with a 10 m pixel resolution (654 * 431
>> cells) (with the line « grid 325816.299079 5106250.59982
>> 9.996519721577727 9.996519721577727 654 431 »), everything compiles
>> OK and the result is quite OK
>> 
> (https://www.groupe-speleo-vulcain.com/wp-content/themes/custom_theme/3d/JB.html
>> ; be patient, it takes time to load), but not with the full
>> resolution.
>> 
>> The process to build each .th DEM is exactly the same, I do not
>> touch any end of line. I edit the .asc DEM with vi to translate it
>> into a .th file.
>> 
>> I thus suspect that there is a size limitation for the DEM in
>> Therion, I imagine a limitation in the number of row/columns of the
>> DEM.
>> 
>> * Is that true ?
>> * If yes, what is this size limit for DEMs ?
>> * As anyone an idea how to overtake that and use the full
>> resolution DEM ?
>> 
>> Cheers,
>> 
>> Xavier
>> 
>> _______________________________________________
>> Therion mailing list
>> Therion at speleo.sk
>> https://mailman.speleo.sk/listinfo/therion
> 
> 
> Links:
> ------
> [1] http://dem.th
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> https://mailman.speleo.sk/listinfo/therion



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