How to rotate the tick marks so that it will be inside the plot

Q&A
1

Hii, I am using PyGmt for plotting a seismic station map.By default the tick marks are coming outside the plot. I want the tick marks to be inside the plot.I hope experts will suggest a solution for the same.Thanks.

2

Hello @seis,

you can adjust the frame of your plot or map be setting MAP_FRAME_TYPE using pygmt.config.
There are 5 options: fancy, fancy+, plain, graph, and inside. Maybe you find the following PyGMT tutorial helpful:
https://www.pygmt.org/latest/tutorials/advanced/configuration.html#sphx-glr-tutorials-advanced-configuration-py

Here, you probably want to use MAP_FRAME_TYPE="inside". However, I am currently unsure whether you only want the ticks itself to be inside the plot or also the annotations.

Please see the example below for orientation:

import pygmt

fig = pygmt.Figure()

pygmt.config(
    MAP_FRAME_TYPE="inside",
)

fig.basemap(
    region=[6, 12, 42, 47],
    projection="M10c",
    frame="af",
)

fig.show()

Output figure:

map_frame_inside
map_frame_inside1182Ă—1377 3.75 KB

3

I need only ticks mark inside the plot not the values

4

If you only want the ticks itself in side the plot, I do not know a real solution, except the “trick” using a negative value for MAP TICK LENGTH. Maybe someone else can help out.

import pygmt

fig = pygmt.Figure()

pygmt.config(
    MAP_TICK_LENGTH="-5p",  # negative
)

fig.basemap(
    region=[6, 12, 42, 47],
    projection="M10c",
    frame="af",
)

fig.show()

map_frame_inside_onlyticks
map_frame_inside_onlyticks1328Ă—1441 5.23 KB

5

I have just seen that there is currently a similar issue on GitHub: how to plot tick marks inside the plot · Issue #2150 · GenericMappingTools/pygmt (github.com)

6

Yes, its mine only…however I am facing problem.
I want to switch on ticks and its values on both the axes. I tried WSEN but on both axes ticks are not on.
Please suggest a solution.
Thanks

7

I see, no worries :wink:.

Do you try to accomplish this:

import pygmt

fig = pygmt.Figure()

pygmt.config(
    MAP_TICK_LENGTH="-5p",
)

fig.basemap(
    region=[6, 12, 42, 47],
    projection="M10c",
    frame=["WSEN", "af"],  # pass a list
)

fig.show()

With this code I get the following figure:

map_frame_inside_onlyticks_WSNE
map_frame_inside_onlyticks_WSNE1393Ă—1479 15.1 KB

8

Thanks @yvonnefroehlich. I want to reduce the frame width and font size of the tick values also. While I am doing the MAP_FRAME_WIDTH=0.5 its not reducing, Are there any other solution for the same.

9

You have to set the argument into quotation marks (and to give an unit). To adjust the front size you can use FONT_ANNOT_PRIMARY. Btw: you finde an overview of all GMT or PyGMT default parameters here: gmt.conf — GMT 6.5.0 documentation (generic-mapping-tools.org).

Here is an example:

import pygmt

fig = pygmt.Figure()

pygmt.config(
    # https://docs.generic-mapping-tools.org/dev/gmt.conf.html#map-parameters
    MAP_TICK_LENGTH="-5p",
    MAP_FRAME_WIDTH="1p",
    # https://docs.generic-mapping-tools.org/dev/gmt.conf.html#font-parameters
    FONT_ANNOT_PRIMARY="6p",
)

fig.basemap(
    region=[6, 12, 42, 47],
    projection="M10c",
    frame=["WSEN", "af"],
)

fig.show()

map_frame_inside_onlyticks_WSNE_size
map_frame_inside_onlyticks_WSNE_size1322Ă—1445 6.77 KB

1 Like
10

Thanks @yvonnefroehlich for your suggestions.

11

Pleased I could help out!