Please can someone explain why the file dimensions for 01d in
are 361 x 181, whilst the file dimensions for 01d in
are 360 x 180 ? Why is there an extra degree in the first file?
Also, the file dimensions in http://gmt.soest.hawaii.edu/doc/latest/datasets.html need serious revision. Their values are not correct.
Pixel vs grid line registration
What dimensions (other than size) are wrong - they look good to me
a/ Is the comment ‘Pixel vs grid line registration’ explaining why there is an extra degree? Is there some online page that explains this in greater detail, please?
b/ In the file ‘http://gmt.soest.hawaii.edu/doc/latest/datasets.html’ there are 10 files with the same dimensions.
Are you aware that original SRTM grids are grid registered and when you find them with pixel registrations they were subjected to a destructive grid change?
See GMT documentation on that topic
I found this, which explains it. Thank you.