Hi Maria:
Just from the cuff, the units are pixels or meters. Try reprojecting
your source data to a projected coordinate system (UTM, for example) and
try kriging again. Set the raster resolution to a course value that
makes sense for your data to run a test raster and then run at the final
resolution you require if you are concerned with processing time.
By using geographic corrdinates, you probably were generating a hugh
raster which caused your computer to hang.
Kirk Schmidt
On 9/30/2021 3:03 PM, Maria Eugenia Gomez wrote:
Hi,
I am using QGIS 3.16.9 Hannover. I want to create a surface (with
kriging) from a list of points whose SRC is WGS84. They are in decimal
degrees covering a surface of 10km x 9km. I can see the points correctly-
My problem comes with the "Ordinary Kriging" setup. I unchecked "block
kriging" and used the following options:
quality measure: stand. dev.
Logarithmic transf.
variogram model: linear
fit:nodes
search range: local
search directions: all directions
number of points: max. number of points
But when I have to fill "cell size", "maximum search distance, block
size.. etc", I do not understand the units and I think this is the
problem. Which type of units should I use? I tried to use decimal
degrees units but then the number of iterations was so high that my
computer hangs.
Can somebody help me with this? I searched on the QGIS documentation
but it does not say anything about units.
Thanks in advance,
Maria
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--
Kirk Schmidt, MScF, BScF, RPF
General Manager
Nortek Resource Solutions Inc.
26 Church Road
Sutherlands River, NS
B0K 1W0
Tel (902) 922.3607
Email: [email protected]
Web: www.nortekresources.com
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