Closed Dani-Lindsay closed 6 months ago
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commented
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yvonnefroehlich
commented
6 months ago Hello @Dani-Lindsay,
The issue with the transparency is related to ghostscript. It is known that there are issues with transparency in GMT 6.4.0 when using gostscript 10.03.0. These issues are fixed in GMT 6.5.0.
The different behaviour of the font size is related to the change from GMT 6.4.0 to 6.5.0. For details please see the GMT documentation at https://docs.generic-mapping-tools.org/dev/colorbar.html#description.
Changing the font size locally can help here:
import pygmt
size = 5
# (I)
fig = pygmt.Figure()
fig.basemap(region=[-size, size, -size, size], projection=f"X{size}c", frame=1)
fig.colorbar(cmap="batlow", position="jMC", frame=["x+lquantity", "y+lunit"])
fig.show()
# (II)
fig = pygmt.Figure()
fig.basemap(region=[-size, size, -size, size], projection=f"X{size}c", frame=1)
# local changes of GMT defaults via context manager
with pygmt.config(
FONT_ANNOT_PRIMARY="17p,blue",
FONT_ANNOT_SECONDARY="15p,darkgreen",
FONT_LABEL="20p,orange",
):
fig.colorbar(cmap="batlow", position="jMC", frame=["x+lquantity", "y+lunit"])
fig.show()
| (I) | (II) |
|---|---|
duplicate to
Dani-Lindsay
commented
6 months ago Sorry, just re-read the link above. So this is a feature of "modern mode" and the fonts are automatically scaled and overwrite the pygmt.config(). Makes sense! Thanks. Here my original message still...
...
Thanks for your quick response @yvonnefroehlich ! This does look like the issue in #3041 linked above.
I just played around with this a little bit. Code below for this figure. As you can see using pygmt.config() at the beginning does set font for the boarder but not for the color scale [left]. The local setting does work that you did suggestion above [right]. It's odd that the scale bar font specify locally at 20p is pretty much the same size as the text at 10p in the centre of the figure. Are you able to recreate this error?
fig = pygmt.Figure()
pygmt.config(FONT=10, FONT_TITLE=10, PS_MEDIA="A4", FORMAT_GEO_MAP="ddd", MAP_FRAME_TYPE="plain", FONT_ANNOT_PRIMARY="10p,blue",
FONT_ANNOT_SECONDARY="10p,darkgreen", FONT_LABEL="10p,orange")
with fig.subplot(nrows=1, ncols=2, figsize=("15c", "11.1c"), margins=["0.5c", "0.5c"], frame=["WSrt"], autolabel="a)", sharex="l"):
pygmt.makecpt(cmap="gray", series=[-1.5, 0.3, 0.01])
fig.basemap(region=region, projection=fig_size, frame=["WSrt", "xa", "ya"], panel=True)
#fig.grdimage(grid=dgrid, region=region, projection=fig_size, cmap=True, frame=["WSrt", "xa", "ya"], transparency=60)
fig.coast(region=region, projection=fig_size, shorelines=True, borders="2", water ="white")
pygmt.makecpt(cmap="vik", series=[-30, 30])
#fig.grdimage(grid=grd_LUTZ_east, region=region, projection=fig_size, nan_transparent=True, cmap=True)
fig.colorbar(position="jBL+o0.4c/0.4c+w4c/0.4c", frame=["xa+lconfig 10p", "y+lmm/yr"], projection=fig_size,)
fig.text(region=region, projection=fig_size, text="East", position="TR", offset="-0.2c/-0.2c", font="12p,Helvetica-Bold,black", pen="black", fill="white")
fig.text(region=region, projection=fig_size, text="Text 10p", position="CM", offset="-0.2c/-0.2c", font="10p,Helvetica-Bold,black", pen="black", fill="white")
fig.basemap(region=region, projection=fig_size, frame=["wSrt", "xa", "ya"], panel=True)
pygmt.makecpt(cmap="gray", series=[-1.5, 0.3, 0.01])
#fig.grdimage(grid=dgrid, region=region, projection=fig_size, cmap=True, frame=["wSrt", "xa", "ya"], transparency=60)
fig.coast(region=region, projection=fig_size, shorelines=True, borders="2", water ="white")
pygmt.makecpt(cmap="vik", series=[-30, 30])
#fig.grdimage(grid=grd_LUTZ_up, region=region, projection=fig_size, nan_transparent=True, cmap=True)
with pygmt.config(
FONT_ANNOT_PRIMARY="17p,red",
FONT_ANNOT_SECONDARY="15p,purple",
FONT_LABEL="20p,purple",
):
fig.colorbar(position="jBL+o0.4c/0.4c+w4c/0.4c", frame=["xa+l20p local font_label", "y+lmm/yr"], projection=fig_size)
fig.text(region=region, projection=fig_size, text="Up", position="TR", offset="-0.2c/-0.2c", font="12p,Helvetica-Bold,black", pen="black", fill="white")
fig.text(region=region, projection=fig_size, text="Text 10p", position="CM", offset="-0.2c/-0.2c", font="10p,Helvetica-Bold,black", pen="black", fill="white")
fname = fig_dir + "font_size_test.png"
fig.savefig(fname, transparent=False, crop=True, anti_alias=True, show=False)
fig.show()This is due to the change in GMT 6.5.0: The font size of the colorbar is scaled relatively to the length of the colorbar. This seems to be the case even a fixed font size is given via adjusting the GMT defaults locally:
import pygmt
size = 5
for size_cb in [
"", # (III) Use default length of the colorbar
"+w1c", # (IV) # Make the colorbar shorter than the default
"+w5c", # (V) # Make the colorbar longer than the default
]:
fig = pygmt.Figure()
fig.basemap(region=[-size, size, -size, size], projection=f"X{size}c", frame=1)
fig.text(position="MC", text="text in 15p", font="15p")
# local changes of GMT defaults via context manager
with pygmt.config(
FONT_ANNOT_PRIMARY="15p,blue",
FONT_ANNOT_SECONDARY="15p,darkgreen",
FONT_LABEL="15p,orange",
):
fig.colorbar(
cmap="batlow",
position=f"jMR{size_cb}",
frame=["x+lquantity", "y+lunit"],
)
fig.show()| (III) default length | (IV) smaller length | (V) longer length |
|---|---|---|
Hi all,
I was having trouble with using transparency and solved this by just reinstalling pygmt in a new conda environment but now the font on my scale bars has gone strange... What config parameter controls the font size on the color bars? I tried to set all the different font configs to override this but didn't worked.
Old environment...
New environment...
Code to make these plots