QGIS – How to Set the Same Color Ramp for All Categorized Styles

qgisstyle

I have the categorized styling for my layers like you can see below.
What I would like to have is the sale colour of all the styles categorized, whereas their patterns will vary between each other.

Some similar issue has been considered here:

Apply a different color ramp to subset of categorized symbols in QGIS?

but it doesn't match my problem.
I can obviously copy the color HTML code between all the categories, although I am wondering about the solution, which would allow me to define the color ramp for everything at once.

Best Answer

Open the layer properties and select all the categories you want to have with the same colour. After that "right click" and select "change color", now you can choose a colour for all the elements.

And you got it.

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[GIS] Defining a color ramp for temperature range & applying it to different rasters

An approach would be creating a style for each raster, ranging from -40°C to +20°C (or whatever you want).

Firstly, right-click on the layer and, from Properties >> Style, try to set it following these steps:

Then, save the style (as a .qml file) going to Style >> Save Style... from the same dialog above, but remember to save it with the same name of the layer to which it refers.

Finally, go to the system folder containing the rasters and copy-and-paste the style for every raster file you want to compare (if you have one raster per month, you need to copy-and-paste the .qml just created for 11 times and then edit the filename).

In this way, you will be able to switch through the several rasters without looking to the legend because the colors for each raster will range from -40°C to +20°C.

[GIS] Changing symbol size using the “Size assistant” in QGIS

In your case you would to represent size of the proportionality with a manual scale... It's not possible by this way as it show here

What you have to do is to define your mathematic function with scale_exp as the size assistant method:

Ex.

coalesce(scale_exp(Number, 1, 11000, 1, 10, 0.3),0)  

Coalesce replace the first value not null by 0.
First param: your Var
2: min value
3:max value
4:min size result
5:max size result
6: exponent param (the most important to you, try 0.3 and see).

Best Answer

Related Solutions

[GIS] Defining a color ramp for temperature range & applying it to different rasters

[GIS] Changing symbol size using the “Size assistant” in QGIS

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