[GRASS-user] About NASA SSE Data
Hi all, I want to use NASA SSE clear sky index data for crosschecking. But I am little bit confused. Because there is more than one index dataset. Which one should I use? -Monthly Averaged Insolation Clearness Index -Monthly Averaged Insolation Normalized Clearness Index -Monthly Averaged Clear Sky Insolation Clearness Index -Monthly Averaged Clear Sky Insolation Normalized Clearness Index Thanks Regards Buraq -- View this message in context: http://n2.nabble.com/About-NASA-SSE-Data-tp3675096p3675096.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] clear sky index interpolation
Hi again,
Actually I want both.
I ran like this v.surf.rst input=KcVect elev=KcRast zcolumn=kc tension=10
segmax=600 It is ok and no problem here. Problem starts at 3D volume.
Now my csv contains {lat,lon,elevation,kc}. When I try to run v.vol rst I
get that Error in COGRR! Interp_call failed.
Dylan Beaudette-2 wrote:
Hi,
Are you trying to generate a 2D raster map of interpolated values, or
a 3D 'volume' of interpolated values? If your input consists of
{lat,lon,kc}, then a 2D raster map is likely what you are after. In
that case, check out the v.surf.rst module.
Cheers,
Dylan
On Fri, Sep 4, 2009 at 6:49 AM, buraqzak...@gmail.com wrote:
buraq wrote:
Hi,
It's a newbie question.
I am trying to intepolate clear sky index values. First I put the values
in a csv file in this format lat,lon,kc.
Then I used db.in.ogr to get table. Next step, vector raster map is
created by v.in.db. When I want to create raster file, I use that
command
v.vol.rst input=Kc vect cellinp=elevationRaster wcolumn=indexValueColumn
then I get this Vector is not 3D
Should I add elevation to csv? or what is the right way the interpolate
the data?
Thanks
Regards
hi again I tried interpolation with elevation data. Now I got x,y and z
But
now the problem is, v.vol.rst gives the Error in COGRR! Interp_call
failed message. Have you ever meet this kind of a error message? I
searched
the list but couldn't find any information about that kind of problem.
Thanks
Regards
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Re: [GRASS-user] clear sky index interpolation
buraq wrote: Hi, It's a newbie question. I am trying to intepolate clear sky index values. First I put the values in a csv file in this format lat,lon,kc. Then I used db.in.ogr to get table. Next step, vector raster map is created by v.in.db. When I want to create raster file, I use that command v.vol.rst input=Kc vect cellinp=elevationRaster wcolumn=indexValueColumn then I get this Vector is not 3D Should I add elevation to csv? or what is the right way the interpolate the data? Thanks Regards hi again I tried interpolation with elevation data. Now I got x,y and z But now the problem is, v.vol.rst gives the Error in COGRR! Interp_call failed message. Have you ever meet this kind of a error message? I searched the list but couldn't find any information about that kind of problem. Thanks Regards -- View this message in context: http://n2.nabble.com/clear-sky-index-interpolation-tp3572894p3580073.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] clear sky index interpolation
Hi, It's a newbie question. I am trying to intepolate clear sky index values. First I put the values in a csv file in this format lat,lon,kc. Then I used db.in.ogr to get table. Next step, vector raster map is created by v.in.db. When I want to create raster file, I use that command v.vol.rst input=Kc vect cellinp=elevationRaster wcolumn=indexValueColumn then I get this Vector is not 3D Should I add elevation to csv? or what is the right way the interpolate the data? Thanks Regards -- View this message in context: http://n2.nabble.com/clear-sky-index-interpolation-tp3572894p3572894.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] hardware requirements for running r.sun
Hi, I have a notebook with T7200 Intel CPU and r.sun completes one day's calculation between 3-4 mins(with linke turbidity raster and shadowing, step = 1). I want to run r.sun with step=0.5 in a large scale and detailed area. So, I need to reduce the calculation time for calculating 365 day data. Could you give me advices about hardware for reducing calculation time? Thanks Regards... -- View this message in context: http://n2.nabble.com/hardware-requirements-for-running-r.sun-tp3182625p3182625.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Calculating real sky condition with r.sun
Hi all, I am dealing with r.sun. I am really confused and need your help. I have couple of questions. First how can I use clear sky index raster map as an input to r.sun? Regardless of the first question, I have measured cloudiness data. How can I use this data in r.sun? Should I create coefbh and coefdh from that data? If it is how? Thank you Burak -- View this message in context: http://n2.nabble.com/Calculating-real-sky-condition-with-r.sun-tp2352254p2352254.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Creating turbidity raster file
Markus Neteler wrote: You have to use the zcolumn parameter to indicate which column to use. Hope this helps, Markus It worked!! thanks a lot -- View this message in context: http://n2.nabble.com/Creating-turbidity-raster-file-tp2297732p2301479.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Creating turbidity raster file
Dylan Beaudette wrote:
On Monday 09 February 2009, Hamish wrote:
buraq wrote:
I have formatted csv files for every month which is like
latitude;longitude;turbidityValue. So I want to create
raster files from these csvs for using in r.sun.
v.in.ascii - convert .csv to a vector points file
g.region # set up raster grid
v.surf.rast - interpolate vector points to raster surface
Minor correction:
v.surf.rast --- v.surf.rst
I have worried about r.sun's Linke Turbidity factor values in areas with
big changes in elevation. Is turbidity value heavily dependent on
altitude?
It should, as it is based on a measure of optical thickness (air mass):
Extracted from a document --
m = \frac{1}{sin(\alpha) + 0.15(\alpha + 3.885)^{-1.253}} e^{-0.0001184
\times
A}
\noindent
where $\alpha$ is the solar elevation angle at (12:00 pm local time) on
each
day of the year, and $A$ is the weather station elevation in meters above
mean sea level (MSL).
Extracted from a document --
This stuff is also on pages 40-41 of this document:
http://169.237.35.250/~dylan/d_e_beaudette-ms_thesis.pdf
Cheers,
Dylan
Hamish
--
Dylan Beaudette
Soil Resource Laboratory
http://casoilresource.lawr.ucdavis.edu/
University of California at Davis
530.754.7341
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I took the turbidity values from soda-is.com. I entered no altitude value
for the latitude and longitude.
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[GRASS-user] Creating turbidity raster file
Hi all, I am new in grass. Maybe that can be easy for you.. I have formatted csv files for every month which is like latitude;longitude;turbidityValue. So I want to create raster files from these csvs for using in r.sun. What I have done so far, I created MIFs in mapInfo then imported grass using v.in.ogr. Then I used v.surf.rst to make them raster. But I think it's failed. I got that http://n2.nabble.com/file/n2297732/MapDisplay.png MapDisplay.png How can I do this right? Thanks for your help -- View this message in context: http://n2.nabble.com/Creating-turbidity-raster-file-tp2297732p2297732.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
