GIMP Version: 2.8.14
Operating System: Windows
OS Version: windows 7
GIMP Experience: Basic Level

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I am using a axnometric template to help me draw quilt blocks. I downloaded the axnometric grid and placed it in the bottom layer. This grid has vertical and horizontal lines that should be 0.25 inches apart. It also has related diagonal lines.

(I cannot insert a picture that I have uploaded to photobucket.)

I also turned on the GIMP grid to double check the measurements. The 2 grids do not match. There should be 4x4=16 small blue axnometric squares inside 1 black GIMP grid square.

How do I scale the axnometric layer so that it lines up with the GIMP grid? Using the scale dialogue box is so trial and error. Is there a way to drag and rescale?

Thanks in advance.

There should be no need to scale anything if your original grid is half decent. Probably a matter of geometry.

One of my favourites for free graphpaper graphics is incomptech.
https://incompetech.com/graphpaper/axonometric/

For your spec of verticals and horizontals at 0.25" centers then a square size of 0.35355" is required. Zero margins help as well. Looks like this:

In Gimp the default resolution for a PDF is 100 ppi. That will work but if quality printing is also required, recommend upping that to 300 ppi. All-in-one showing grid and settings.

Thank you rich2005. I read somewhere here (I think) about using Filters --> Render --> Grid etc.etc. to place a printable grid on my quilting design. Also I discovered I could calibrate the GIMP grid to 0.25 inches and that seems to work fine for me for now.

Hi, I am new here and looking for the solution as I am trying to make the quilt cover design here in Australia for my project. But I am unable to make the design which I want!

Can you be a bit more explicit about the problem?

For that kind of project you could try Inkscape. It has a built in axonometric grid.

Here's how I get accurate measurements with inches in gimp.

1. I crop the image to the known size. If your image has a grid then you would crop it to that.
2. Then I resize the image using an X and Y resolution of 128 pixels. So imagine that 128 is one inch 64 is half inch 32 is quarter inch 16 is an eighth 8 is one sixteenth etc. You could also use 256 if you wanted higher resolution. And I make the image size in inches to match what it is supposed to be.

This way grid marks will match up exactly with pixels.

127 pixels matches up good with millimeters. I think it's 5 pixels per millimeter.

As always Gimp has settings for this.

It is the View -> Dot-for-Dot option. By default it is on and 1 drawing pixel corresponds with 1 monitor pixel, which is the best option for editing.

Turn that off and at 100% zoom you see what the image looks like in real life. Often comes as a shock to people expecting a poster and getting a postage stamp.

The screen(monitor) resolution will need setting up. Use Edit -> Preferences -> Display for the settings. It might need a little trial and error as in this photograph of my laptop. This has a 14" 1920x1080 display and the resolution settings were definitely not automatically detected.


That shows a 150 mm wide canvas, and a real-life scale rule attached over the top. Also a 20 mm grid, set that up per drawing with Image -> Configure Grid.