Is it possible not default PDF for layers merging?

Q&A
1

Version gmt 6.1 fro windows
Can not merge layers for formats exсept
pdp
When I make - png, -ps etc at end of commnadы,
I get pictures for each layer, no merging
For example following script gives me correct merged pdf
But I can not modify it to create same merged png or postsript
gmt begin map
gmt coast -R25.5/45.5/34.5/42.5 -JM6i -Gwhite -S0/200/255 -U -I9/0/0/255 -I1/0/0/255 -I2/0/0/255 -B
gmt xyz2grd cureqandtbl1.csv -R26/44/35/41.9375 -JM6i -I10k -Gtr.nc
gmt grdcontour tr.nc -JM6i -B -S4 -Ncont.cpt
gmt end show

2

You make layers via gmt being name formats. The -png and -pdf etc are for single-layer plots only.

3

Please, any sample
I am still very stupid in GMT

4

Probably something like this script:

gmt begin map png
gmt coast -R25.5/45.5/34.5/42.5 -JM6i -Gwhite -S0/200/255 -U -I9/0/0/255 -I1/0/0/255 -I2/0/0/255 -B
gmt xyz2grd cureqandtbl1.csv -R26/44/35/41.9375 -I10k -Gtr.nc
gmt grdcontour tr.nc -S4 -Ncont.cpt
gmt end show

It should create the PNG file map.png and open it for you to view.

5

No, it gives error message
gmt [ERROR]: Option -N: CPT file must be discrete, not continuous
and only one png file with coast

6

thank a lot
It was my mistake
with cpt
script works fine !!
and produce png merged file
gmt begin map png
gmt coast -R25.5/45.5/34.5/42.5 -JM6i -Gwhite -S0/200/255 -U -I9/0/0/255 -I1/0/0/255 -I2/0/0/255 -B
gmt xyz2grd cureqandtbl1.csv -R26/44/35/41.9375 -I10k -Gtr.nc
gmt grdcontour tr.nc -S4
gmt end show

7

To merge layers in GMT without the default PDF format, you can use the -T option to specify the output format. For example, to merge layers into a PNG image, you would use the following command:

gmt begin map gmt coast -R25.5/45.5/34.5/42.5 -JM6i -Gwhite -S0/200/255 -U -I9/0/0/255 -I1/0/0/255 -I2/0/0/255 -B gmt xyz2grd cureqandtbl1.csv -R26/44/35/41.9375 -JM6i -I10k -Gtr.nc gmt grdcontour tr.nc -JM6i -B -S4 -Ncont.cpt gmt end show -Tpng > merged.png

To merge layers into a PostScript file, you would use the following command:

gmt begin map gmt coast -R25.5/45.5/34.5/42.5 -JM6i -Gwhite -S0/200/255 -U -I9/0/0/255 -I1/0/0/255 -I2/0/0/255 -B gmt xyz2grd cureqandtbl1.csv -R26/44/35/41.9375 -JM6i -I10k -Gtr.nc gmt grdcontour tr.nc -JM6i -B -S4 -Ncont.cpt gmt end show -Tps > merged.ps

You can also use the -P option to specify a custom output resolution. For example, to merge layers into a PNG image at 300 DPI, you would use the following command:

gmt begin map gmt coast -R25.5/45.5/34.5/42.5 -JM6i -Gwhite -S0/200/255 -U -I9/0/0/255 -I1/0/0/255 -I2/0/0/255 -B gmt xyz2grd cureqandtbl1.csv -R26/44/35/41.9375 -JM6i -I10k -Gtr.nc gmt grdcontour tr.nc -JM6i -B -S4 -Ncont.cpt gmt end show -Tpng -P300 > merged.png

that is your solutions

and In that sence I also suggest a pdf merging tools - https://pdfinsider.com/en/merge-pdf

8

Hm, looks like you have no carriage return in your editor? All scripts on a single line, it seems. And gmt end has no -T option. Finally this post was a non-problem to start with.