Modern mode: specify paper size and not cropping the figure

[seisman]

In modern mode, figures are by default cropped to the minimum required by the image contents, using psconvert -A.

Sometimes, we may want to plot a figure on A4 paper for printing. In this case, we need to specify paper size and set psconvert to not crop the figure.

This is what I try:

gmt begin map png
gmt set PS_MEDIA=A4 PS_CONVERT=""
gmt basemap -R0/10/0/10 -JX10c -Bafg 
gmt end

However, you'll see that the right part of the figure is missing. It seems that the origins for the plot are somehow in the middle of the paper, different from the behavior in classic mode. Is it desired or a bug?

[PaulWessel]

Hm, I print PDF figures all the time. The printer knows its paper size and off it goes. I can even scale the figure if I want to or let it be exactly as is. it tends to center the figure on the paper. Anyway, what you got is probably not what we want but I think you are trying to defeat how GMT is doing things.

[seisman]

Now I understand why GMT tends to center the figure on the paper in modern mode.

I once thought that following codes should work.

gmt begin map png 
gmt set PS_MEDIA=A4 PS_CONVERT="" MAP_ORIGIN_X=2i MAP_ORIGIN_Y=2i
gmt basemap -R0/10/0/10 -JX10c -Bafg 
gmt end

However, the plot is still not at the lower left corner of the paper. Why does basemap ignore MAP_ORIGIN_X and MAP_ORIGIN_Y?

[joa-quim]

I've not tested the modern mode much on Win and suspect there are issues in it. Just to check, do you also get this error?

gmt basemap -R0/10/0/10 -JX10c -Bafg --PS_MEDIA=A4 --PS_CONVERT="" --MAP_ORIGIN_X=2i --MAP_ORIGIN_Y=2i map pdf
gmt [ERROR]: Shared GMT module not found: basemap

[seisman]

@joa-quim I think the correct one-line command should be:

gmt basemap -R0/10/0/10 -JX10c -Bafg --PS_MEDIA=A4 --PS_CONVERT="" --MAP_ORIGIN_X=2i --MAP_ORIGIN_Y=2i -pdf map

Please note the dash symbol before pdf.

[PaulWessel]

Note this gives what you want but PS:

gmt basemap -R0/10/0/10 -JX10c -Bafg --PS_MEDIA=A4 --PS_CONVERT="" --MAP_ORIGIN_X=2i --MAP_ORIGIN_Y=2i -ps map

[joa-quim]

Right. You can see that have not been practicing modernity. But it respects the X,Y origin. I mean, origin is at 2,2 inch

[seisman]

Two solutions I just find.

gmt begin map ps
gmt basemap -R0/10/0/10 -JX10c -Bafg 
gmt end
gmt psconvert map.ps -P -Tf

gmt begin map pdf
gmt set PS_MEDIA=A4 PS_CONVERT="" 
gmt basemap -R0/10/0/10 -JX10c -Bafg -X1i -Y1i 
gmt end

[joa-quim]

Sorry, don't get what is the problem. These both work as intended

gmt basemap -R0/10/0/10 -JX10c -Bafg --PS_MEDIA=A4 --PS_CONVERT="" -X1i -Y1i -pdf map

gmt basemap -R0/10/0/10 -JX10c -Bafg --PS_MEDIA=A4 -X1i -Y1i -ps map

[PaulWessel]

Try MAP_ORIGIN_X|Y instead...

[seisman]

MAP_ORIGIN_X and MAP_ORIGIN_Y don't work because they only works for a new plot. For an overlay, the default offset is always zero.

[stale]

This issue has been automatically marked as stale because it has not had activity in the last 30 days. It will be closed if no further activity occurs within 7 days. Thank you for your contributions.

[leouieda]

@seisman any update on this issue?

[seisman]

Close this issue, since I've found two solutions.