Hi Pete and all,

On Thu, Aug 22, 2013 at 03:05:33PM +0100, Pete Bunting wrote:

> Hi Roberto, 
> 
> With the merging there is a switch --ignorechecks which I use when I know
> files are 'the same'. These checks try to make sure that everything in the
> headers of the SPD files are the same and very small rounding errors can
> disrupt this, which is why I added the ignore switch. 

Yes, I was awared of this switch but I prefered to understand why the error
arises. Would it be possible to know the reason?

> As an aside, there is a python script (spdbuildmergecmd.py) which you can use
> automatically build you spdmerge commands. 

I saw this python script browsing the source but I did not really understand it
that much, not even with the manual. I will give it another chance. 

> With the other errors I don't know, I would need to have a look at the files
> and try to reproduce the error and debug the code. Following the merge what
> bin size are you translating your files to?

Good point! 

I used the bin size by default to translate from las to spd, in fact
spdinfo says the files Bin Sizes are:
Gridding [xSize,ySize] Bin Size: [501,501] 1

Surprisingly, the header of the merged file is:
Gridding [xSize,ySize] Bin Size: [0,0] 0

I guess that is why spdinterp and spdpmfgrd do not work properly. The question
now is to know why Bin Size is 0.

> If you are processing large datasets you might find it quicker and easier to
> use the tiling commands which splits the scene into tiles (with an optional
> overlap between tiles) which you can then process independently

Yes, I know that. As a matter of fact, my las files are actually tiles. I was
just... testing ;) 

Cheers,
Roberto

-- 
Roberto Antolín
http://twitter.com/#!/tolanss

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