Annotation Coordinates: Difference between revisions
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When visualizing spatial relationships among network nodes representing regions in surface space, it is necessary to assign each node a position in 3D space. | When visualizing spatial relationships among network nodes representing regions in surface space, it is necessary to assign each node a position in 3D space. The XYZ coordinates of each vertex associated with a label can be found in the corresponding ''.label'' files in the label/regenerated_?h_* directories that were generated when carrying out the Lausanne parcellation. For example, to calculate representative spatial locations for the labels in the 60 label parcellation, the associated label files are in ''label/regenerated_?h_60''. | ||
The .label files are plaintext, and are formatted as follows: | |||
#!ascii label , from subject FS_T1_501 vox2ras=TkReg | |||
-- | 1858 | ||
- | 50139 -32.785 -24.134 19.744 0.0000000000 | ||
50148 -32.758 -24.176 19.440 0.0000000000 | |||
50149 -33.035 -24.591 18.914 0.0000000000 | |||
50157 -33.293 -24.616 18.023 0.0000000000 | |||
51159 -32.615 -23.587 20.632 0.0000000000 | |||
... etc. | |||
After the header row and the number of vertices in the file, the left-most column is the vertex number, and the three following columns are the x,y,z coordinates for that vertex. A reasonable value for the representative spatial location of that node can be obtained by calculating the mean x,y,z coordinate. | |||
Revision as of 12:39, 19 May 2016
When visualizing spatial relationships among network nodes representing regions in surface space, it is necessary to assign each node a position in 3D space. The XYZ coordinates of each vertex associated with a label can be found in the corresponding .label files in the label/regenerated_?h_* directories that were generated when carrying out the Lausanne parcellation. For example, to calculate representative spatial locations for the labels in the 60 label parcellation, the associated label files are in label/regenerated_?h_60.
The .label files are plaintext, and are formatted as follows:
#!ascii label , from subject FS_T1_501 vox2ras=TkReg 1858 50139 -32.785 -24.134 19.744 0.0000000000 50148 -32.758 -24.176 19.440 0.0000000000 50149 -33.035 -24.591 18.914 0.0000000000 50157 -33.293 -24.616 18.023 0.0000000000 51159 -32.615 -23.587 20.632 0.0000000000 ... etc.
After the header row and the number of vertices in the file, the left-most column is the vertex number, and the three following columns are the x,y,z coordinates for that vertex. A reasonable value for the representative spatial location of that node can be obtained by calculating the mean x,y,z coordinate.