[GRASS-dev] g.gui.animation freezes when loading strds

[Martin Landa]

Hi,

2017-08-08 16:41 GMT+02:00 Martin Landa <landa.martin at gmail.com>:
> I did quick test with nc_climate_spm_2000_2012 datasets.
> g.gui.animation loaded data, I was able to export also animation as
> avi file. I will check my dataset again. Ma

I had time to dig into `g.gui.animation` source code and discover
where the problem is. It is caused by wrong time granularity in my
dataset. I have 32 maps valid for each year. My dataset was wrongly
created with granularity of 1 sec.

$ t.rast.list clearcut | head -n3
name|mapset|start_time|end_time
CZ0524011_clearcut_PX20_1984_2016___1984|PERMANENT|1984-01-01
00:00:00|1984-12-31 23:59:59
CZ0524011_clearcut_PX20_1984_2016___1985|PERMANENT|1985-01-01
00:00:00|1985-12-31 23:59:59

$ t.info clearcut | grep Granularity
 | Granularity:................ 1 second

It causes problem since `g.gui.animation` tries to sample maps into
given granularity [1]. In my case it nicely fills RAM in few seconds.
It would be probably meaningful to check how many maps are sampled and
at least to print a fat big warning if it exceeds reasonable limit.
What do you think?

After fixing my dataset to granularity to 1 year, `g.gui.animation`
starts to work.

$ t.info clearcut | grep Granularity
 | Granularity:................ 1 year

$ t.rast.list clearcut | head -n3
name|mapset|start_time|end_time
CZ0524011_clearcut_PX20_1984_2016___1984|PERMANENT|1984-01-01
00:00:00|1985-01-01 00:00:00
CZ0524011_clearcut_PX20_1984_2016___1985|PERMANENT|1985-01-01
00:00:00|1986-01-01 00:00:00

Ma

[1] https://trac.osgeo.org/grass/browser/grass/trunk/gui/wxpython/animation/temporal_manager.py#L265

-- 
Martin Landa
http://geo.fsv.cvut.cz/gwiki/Landa
http://gismentors.cz/mentors/landa