I'm trying to merge 3 maps into a single map - each map is the order of 50 megapixel, although quite small files (2 -3 MB).
The maps are from the same source and should go together nicely, like a jigsaw
I've removed detail from around the edges I don't want and converted to a transparent background. I'm putting the maps in different layers and then using Layer -> Transform .... to adjust one layer relative to the other. Then I'll merge them down into a single layer.
In principle, I think this should work - unless there's a better way?
I can't, however, shift, scale and rotate one layer with respect to the background layer with sufficient precision - the sliders are too coarse.
I would like to be able to adjust rotations by perhaps 0.1º, shift by almost pixel precision and scale to perhaps 0.1%, maybe even moreprecisely ...
Thanks,
regards,
Larry Stoter
Precise relative positioning of layers
-
- Posts: 52
- Joined: Thu Jan 05, 2017 3:22 pm
Precise relative positioning of layers
Larry Stoter
GC12 and MacOS Ventura 13.2
GC12 and MacOS Ventura 13.2
- forum_adm
- Site Admin
- Posts: 1818
- Joined: Fri Dec 23, 2016 9:41 am
- Location: Germany
- Country: Germany
- Contact:
Re: Precise relative positioning of layers
Larry,
the batch concat method is normally much quicker for this.
Thorsten
the batch concat method is normally much quicker for this.
Thorsten
-
- Posts: 52
- Joined: Thu Jan 05, 2017 3:22 pm
Re: Precise relative positioning of layers
Sorry, didn't explain myself very well.
These 3 maps, once I have removed, cleaned up and/or made transparent the areas I don't want to keep, are exactly like pieces of a jigsaw.
I don't want to simply place them next to each other - I want to slot them into each other so they need to overlap with adjustments in scale and rotation to get the edges to meet exactly.
I don't think concatenation does this? Doesn't concatentation simply place them edge-to-edge?
Thanks,
Larry
These 3 maps, once I have removed, cleaned up and/or made transparent the areas I don't want to keep, are exactly like pieces of a jigsaw.
I don't want to simply place them next to each other - I want to slot them into each other so they need to overlap with adjustments in scale and rotation to get the edges to meet exactly.
I don't think concatenation does this? Doesn't concatentation simply place them edge-to-edge?
Thanks,
Larry
Larry Stoter
GC12 and MacOS Ventura 13.2
GC12 and MacOS Ventura 13.2
- forum_adm
- Site Admin
- Posts: 1818
- Joined: Fri Dec 23, 2016 9:41 am
- Location: Germany
- Country: Germany
- Contact:
Re: Precise relative positioning of layers
Hi Larry,
yes, concat place them edge-to-edge.
Layers are the better choice if the images are arranged another way.
Thorsten
yes, concat place them edge-to-edge.
Layers are the better choice if the images are arranged another way.
Thorsten
-
- Posts: 52
- Joined: Thu Jan 05, 2017 3:22 pm
Re: Precise relative positioning of layers
OK, which was my understanding.
This returns to my orginal question - because the images are large (50 to 80 megapixel, I need to rotate very precisely. 0.5º over several 1,000 pixels is significant. The sliders controls in Layers -> Transform ... are not sufficiently precise.
Thanks,
Larry
This returns to my orginal question - because the images are large (50 to 80 megapixel, I need to rotate very precisely. 0.5º over several 1,000 pixels is significant. The sliders controls in Layers -> Transform ... are not sufficiently precise.
Thanks,
Larry
Larry Stoter
GC12 and MacOS Ventura 13.2
GC12 and MacOS Ventura 13.2