[chimerax-users] Re-scaling maps

[Tom Goddard]

Hi Nebojša,

  When you open a volume file ChimeraX reports the voxel size, for example 2.7 Angstroms in the following example

	> open 1080 from emdb
	Opened emdb 1080 as #1, grid size 100,100,100, pixel 2.7, shown at level 1.68, step 1, values float32

Then if you wanted to change it use

	volume #1 voxelSize 2.5

or you can use menu Tools / Volume Data / Map Coordinates and change the voxel size entry in the panel that appears.

	Tom


> On Jul 28, 2022, at 6:38 AM, Nebojsa Bogdanovic via ChimeraX-users <chimerax-users at cgl.ucsf.edu> wrote:
> 
> Hello,
> 
> I have two maps. One from cryosparc @ 1.06 A/pix and another EM-gan sharpened map @ 1.0 A/pix. They are different in size upon visual inspection in chimeraX so I tried relion_image_handler --i cryosparc.mrc --angpix 1.0 --rescale_angpix 1.06 --o cryosparc-rescaled.mrc however, the resulting map is still smaller than the original input. I also tried to rescale in this way to several different angpix values but maps are still not the same.
> 
> Is there any command in chimeraX or chimera to play with pix sizes to find the right one?
> 
> Thank You and regards,
> 
> Nebojša Bogdanović, Ph.D
> Department of Physiology and Biophysics,
> School of Medicine,
> Case Western Reserve University
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