Re: [GRASS-user] Analyzing level ground
On Mon, 26 Sep 2016, Laurent C. wrote: Could you check that the point you want to set as outlet is inside your Region? Please check your Region extend. For the units, as long as the location is not in lat-long, Itzï will run. But it expects SI units, so using feet might gives you unexpected results. I would suggest to work with the units given in the manual. Laurent, Yes, that point is well within the region. The region is set to the analytical boundary which incorporates that point. That's what puzzled me about the error message. I'll convert feet to meters and try again tomorrow morning. Thanks, Rich ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Analyzing level ground
Hello Rich, Could you check that the point you want to set as outlet is inside your Region? Please check your Region extend. For the units, as long as the location is not in lat-long, Itzï will run. But it expects SI units, so using feet might gives you unexpected results. I would suggest to work with the units given in the manual. Regards, Laurent El sept. 26, 2016 18:31, "Rich Shepard" escribió: > On Thu, 22 Sep 2016, Laurent C. wrote: > > If it is the case, you might give Itzï a try: >> https://www.itzi.org/ >> > > Laurent, > > I'm emulating your tutorial with my data and have run into an error with > r.water.outlet: > > r.water.outlet in=be_drainage out=watershed coord=753992.63435,57992.90515 > 9 > --overwrite > WARNING: Ignoring point outside computation region: 753992.6343,57992.9052 > 100% > > The coordinates are those of a culvert inflow (easting, northing) in > international feet. Do I need to create a new location to convert these > value to meters or have I done something else incorrectly? > > Regards, > > Rich > ___ > grass-user mailing list > grass-user@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/grass-user ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Analyzing level ground
On Thu, 22 Sep 2016, Laurent C. wrote: If it is the case, you might give Itzï a try: https://www.itzi.org/ Laurent, I'm emulating your tutorial with my data and have run into an error with r.water.outlet: r.water.outlet in=be_drainage out=watershed coord=753992.63435,57992.905159 --overwrite WARNING: Ignoring point outside computation region: 753992.6343,57992.9052 100% The coordinates are those of a culvert inflow (easting, northing) in international feet. Do I need to create a new location to convert these value to meters or have I done something else incorrectly? Regards, Rich ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Analyzing level ground
Hi Laurent,
I had previously started playing with Itzï but reported problems; now, it
seems to work to a point. I have followed your tutorial here:
https://www.itzi.org/user-manual/ but when I do this I get:
GRASS 7.0.3 (nc_spm_08_grass7):/media/teaiii/development/grass > itzi run
param.file.txt
ERROR: Unable to execute sql statement. There is no temporal database
connection defined for mapset
Traceback (most recent call last):
File "/home/teaiii/.local/bin/itzi", line 11, in
sys.exit(main())
File "/home/teaiii/.local/lib/python2.7/site-packages/itzi/itzi.py", line
40, in main
args.func(args)
File "/home/teaiii/.local/lib/python2.7/site-packages/itzi/itzi.py", line
93, in itzi_run
sim_param=conf.sim_param)
File
"/home/teaiii/.local/lib/python2.7/site-packages/itzi/simulation.py", line
75, in __init__
self.gis.read(self.in_map_names)
File "/home/teaiii/.local/lib/python2.7/site-packages/itzi/gis.py", line
189, in read
elif self.name_is_stds(self.format_id(map_name)):
File "/home/teaiii/.local/lib/python2.7/site-packages/itzi/gis.py", line
138, in name_is_stds
if tgis.SpaceTimeRasterDataset(name).is_in_db():
File
"/usr/local/grass-7.0.3/etc/python/grass/temporal/abstract_dataset.py",
line 370, in is_in_db
return self.base.is_in_db(dbif)
File "/usr/local/grass-7.0.3/etc/python/grass/temporal/base.py", line
314, in is_in_db
dbif.execute(sql, mapset=self.mapset)
File "/usr/local/grass-7.0.3/etc/python/grass/temporal/core.py", line
956, in execute
"mapset <%(mapset)s>" % {"mapset": mapset}))
File
"/usr/local/grass-7.0.3/etc/python/grass/pygrass/messages/__init__.py",
line 269, in fatal
raise FatalError(message)
grass.exceptions.FatalError: Unable to execute sql statement. There is no
temporal database connection defined for mapset
[Raster MASK present]
I'm using GRASS 7.0.3 and Itzï 16.8
Any thoughts?
Regards,
Tom
On Thu, Sep 22, 2016 at 2:27 PM, Laurent C. wrote:
> Hello Rich,
>
> For the infiltration, if you can determine the soil texture, then you
> could estimate the Green-Ampt parameters using [1]
> What do you want to do in that area? Perform hydrological/overland
> flow analysis?
> If it is the case, you might give Itzï a try:
> https://www.itzi.org/
> Some of the parameters could be estimated (like friction coefficient).
>
> Regards,
> Laurent
>
> [1] Rawls, W., Brakensiek, D., and Miller, N. (1983). "Green‐ampt
> Infiltration Parameters from Soils Data." J. Hydraul. Eng.,
> 10.1061/(ASCE)0733-9429(1983)109:1(62), 62-70.
>
>
> 2016-09-22 13:09 GMT-05:00 Rich Shepard :
> > The project area -- in farmland -- is small (< 20 ha) and essentially
> > flat with elevation differences less than 1 meter. The LiDAR raster cells
> > (imported from ARC Grid format) have a cell size of 3x3 international
> feet;
> > elevation resolution is 0.013 feet.
> >
> > While r.slope.aspect generates an aspect map, the slope map is blank.
> The
> > maps for dx, dy, and relief display variations.
> >
> > While I have some soil data, it's sparse and I haven't (yet) found
> > infiltration rates; the rainfall data is very low and from a station
> several
> > miles away. I probably do not have all required input data for
> r.sim.water
> > or r.watershed.
> >
> > Based on your much more extensive experiences applying GRASS to limited
> > areas please suggest approaches that might be appropriate for this
> project.
> > It might be that all I can do is create detailed contour maps of the area
> > and describe the situation qualitatively without robust quantitative
> > analyses.
> >
> > TIA,
> >
> > Rich
> >
> > ___
> > grass-user mailing list
> > grass-user@lists.osgeo.org
> > http://lists.osgeo.org/mailman/listinfo/grass-user
> ___
> grass-user mailing list
> grass-user@lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/grass-user
>
--
Thomas E Adams, III
1724 Sage Lane
Blacksburg, VA 24060
1 (513) 739-9512 (cell)
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Re: [GRASS-user] Analyzing level ground
Rich, What is your goal; what are you trying to accomplish? Tom On Thu, Sep 22, 2016 at 2:09 PM, Rich Shepard wrote: > The project area -- in farmland -- is small (< 20 ha) and essentially > flat with elevation differences less than 1 meter. The LiDAR raster cells > (imported from ARC Grid format) have a cell size of 3x3 international feet; > elevation resolution is 0.013 feet. > > While r.slope.aspect generates an aspect map, the slope map is blank. The > maps for dx, dy, and relief display variations. > > While I have some soil data, it's sparse and I haven't (yet) found > infiltration rates; the rainfall data is very low and from a station > several > miles away. I probably do not have all required input data for r.sim.water > or r.watershed. > > Based on your much more extensive experiences applying GRASS to limited > areas please suggest approaches that might be appropriate for this project. > It might be that all I can do is create detailed contour maps of the area > and describe the situation qualitatively without robust quantitative > analyses. > > TIA, > > Rich > > > > > ___ > grass-user mailing list > grass-user@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/grass-user ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Analyzing level ground
Hello Rich, For the infiltration, if you can determine the soil texture, then you could estimate the Green-Ampt parameters using [1] What do you want to do in that area? Perform hydrological/overland flow analysis? If it is the case, you might give Itzï a try: https://www.itzi.org/ Some of the parameters could be estimated (like friction coefficient). Regards, Laurent [1] Rawls, W., Brakensiek, D., and Miller, N. (1983). "Green‐ampt Infiltration Parameters from Soils Data." J. Hydraul. Eng., 10.1061/(ASCE)0733-9429(1983)109:1(62), 62-70. 2016-09-22 13:09 GMT-05:00 Rich Shepard : > The project area -- in farmland -- is small (< 20 ha) and essentially > flat with elevation differences less than 1 meter. The LiDAR raster cells > (imported from ARC Grid format) have a cell size of 3x3 international feet; > elevation resolution is 0.013 feet. > > While r.slope.aspect generates an aspect map, the slope map is blank. The > maps for dx, dy, and relief display variations. > > While I have some soil data, it's sparse and I haven't (yet) found > infiltration rates; the rainfall data is very low and from a station several > miles away. I probably do not have all required input data for r.sim.water > or r.watershed. > > Based on your much more extensive experiences applying GRASS to limited > areas please suggest approaches that might be appropriate for this project. > It might be that all I can do is create detailed contour maps of the area > and describe the situation qualitatively without robust quantitative > analyses. > > TIA, > > Rich > > ___ > grass-user mailing list > grass-user@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/grass-user ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Analyzing level ground
The project area -- in farmland -- is small (< 20 ha) and essentially flat with elevation differences less than 1 meter. The LiDAR raster cells (imported from ARC Grid format) have a cell size of 3x3 international feet; elevation resolution is 0.013 feet. While r.slope.aspect generates an aspect map, the slope map is blank. The maps for dx, dy, and relief display variations. While I have some soil data, it's sparse and I haven't (yet) found infiltration rates; the rainfall data is very low and from a station several miles away. I probably do not have all required input data for r.sim.water or r.watershed. Based on your much more extensive experiences applying GRASS to limited areas please suggest approaches that might be appropriate for this project. It might be that all I can do is create detailed contour maps of the area and describe the situation qualitatively without robust quantitative analyses. TIA, Rich ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
