Let inset begin accept -R and -J to automatically set width or height

[maxrjones]

Description of the desired feature

Currently, the user must use mapproject to determine the appropriate size for a inset to match a given region and projection. It would be useful to allow inset begin to accept the region and projection of the inset, similar to subplot begin, to avoid this extra step. Here is an example of the anticipated usage:

gmt begin test png
    gmt grdimage @earth_relief -R-51/-48/-24/-23 -JM15c -B -Cworld
    gmt inset begin -DjBL+o0.1c -F+p1p,black -R-80/-28/-43/10 -JM2c
        gmt coast -Wthin -Swhite -Ggray 
    gmt inset end
gmt end show

Are you willing to help implement and maintain this feature? Yes

[PaulWessel]

This is not a bug (it is a feature): The user is specifying a 2cx2c inset and requests a Mercator plot for some region. The dimension of that map is

gmt mapproject -R-80/-28/-43/10 -JM2c -W
2	2.20926717722

so -JM? finds that it needs to use a width of 2 * (2/2.20926717722) to fit inside the box. Now, I understand this is inconvenient and perhaps we can improve this, but the solution would be to ask for +w2c/2.20926717722c:

I guess one possible way to deal with this is to specify +w2c/0 and let GMT compute what height needs to be based on the -R -J but that is not yet known when gmt inset begin starts. Will need to think about this a bit. Feel free to turn this "lesson" into a feature request, for instance.

[maxrjones]

Could inset begin accept -J and -R similar to subplot begin in order to make this easier for the user?

[PaulWessel]

Yes, possibly. Please make a feature request and include that suggestion. On October 18, 2021 at 1:41:42 PM, Meghan Jones ***@***.***) wrote: Could inset begin accept *-J* and *-R* similar to subplot begin in order to make this easier for the user? — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#5875 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AGJ7IX6B3LDVKRLHFZNKBHTUHSWDNANCNFSM5GHUH7DA> . Triage notifications on the go with GitHub Mobile for iOS <https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675> or Android <https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub>.

[maxrjones]

Yes, possibly. Please make a feature request and include that suggestion.

OK, I have adjusted this issue to be a feature request rather than a bug report and detailed the suggested feature in the main post.

[PaulWessel]

OK, to close this issue, @meghanrjones ?