Hi,
I looked at your problem. Indeed, using the Group Stat plugin, you will
not be able to easily identify which polygon has the highest values.
You can export a csv with the cross tabulation results but there is
still no way to know which Polygon with the value A has highest value.
You can create a new field called "max" using the following expression.
maximum("Area",group_by:="Polygon")
That will giving you the highest value for each group. Then, you can
select polygon using the following expression
"Area" = "max"
Nicolas
On 2021-07-18 3:08 p.m., Nicolas Cadieux wrote:
Use the extract value by location to get the values from the point
back into the vector grid…
Nicolas Cadieux
https://gitlab.com/njacadieux <https://gitlab.com/njacadieux>
Le 18 juill. 2021 à 15:06, Nicolas Cadieux
<njacadieux.git...@gmail.com> a écrit :
Hi,
Another way is to create a vector grid with the same size and pixel
posting as the original. Then, get the centroids and use the point
value tool to get the band values… This will give you a vector file
but the file will be heavy. You could merge the vector grids after to
merge values with similar values….
Ask yourself if you really need a vector file first. This is not
always the best file format for you data.
Nicolas Cadieux
https://gitlab.com/njacadieux <https://gitlab.com/njacadieux>
Le 18 juill. 2021 à 14:56, Nicolas Cadieux
<njacadieux.git...@gmail.com> a écrit :
Hi,
You could create a style that could apply to both raster and vector
layers but that would not help much here. The problem is that you
need to create the vector based on one of the raster Bands and not
all three. One way could be to combine all three fields into one.
If your RGB is 155 025 255, make this a raster band with 155025255.
Then, I guess you could use that 4th band to make the vector layer,
then resplit the data into 3 fields and use that to create the
colour profile.
Nicolas Cadieux
https://gitlab.com/njacadieux <https://gitlab.com/njacadieux>
Le 18 juill. 2021 à 12:51, krishna Ayyala <ayyalakris...@gmail.com>
a écrit :
I have an image on my qgis map that has 3 bands. Band1 (red),
Band2(green) and Band3(blue). This image has different colors.Is it
possible to convert this image into a vector which should look
exactly like the image.
That means; Is it possible to have the vector file that should have
the same colors as that of the image.
Regards.
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Nicolas Cadieux
https://gitlab.com/njacadieux
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