As it is writing the file (was at 6Mb after 3hrs), the mem usage is
on 114Mb with 1.4Gb free at the moment. It is not using the PageFile.
.... is that at 100%/4(25%) or 1% CPU?
The RAM was increasing gradually also. It's at 1% CPU.
I tried again with a 182kb tile and the process took 10mins or so. It was
using the RAM, increasing up to around 50Mb and 25% CPU usage then drops to
minimal RAM and 1%CPU. It did this twice during the process. Presumeably for
the two files, cleaned and oultiers. At the point it starts writing the
file, it is at the slow speeds mentioned.
Does the edge file equate to a similar size, e.g. will it
take about 47000 seconds to write the file? Is there a rough percentage
of the size of edge file compared to original txt file? I notice it is
also writing to the sqlite.db at the same time.
no idea about file sizes. In 6.5svn and 7svn I've just added some
verbose messages (add --verbose) and some percent done indicators
so it will seem like less of a black box now.
This 182kb file equated to 408kb edge file.
also you can turn on some debug messages to follow the action:
g.gisenv set="DEBUG=1"
Cheers, will try this.
Have I done something wrong?
one thing to check: did you run 'g.region vect=lidar_points res=2 -ap'
before starting? v.lidar.edgedetection seems to use the current
computational region settings for something.
yes, though at 'res=1' for this dataset and didn't use '-ap'
The book and manual says it needs topology for lidar tools to work.
Does it need the database?
I don't think it needs either. Where abouts does it say that?
p252 of 3rd edition '#build topology so that we can use all vector tools'.
However, the method on p256-257 does not mention db or topology. Also, when
I have tried to run v.oultier without db/topology it says it cannot as there
is no database. I will look at this again later. Maybe I am not selecting
3D when I have tried without db etc.
John
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