pygmt.Figure.grdcontour

Figure.grdcontour(grid, **kwargs)

Convert grids or images to contours and plot them on maps

Takes a grid file name or an xarray.DataArray object as input.

Full option list at https://docs.generic-mapping-tools.org/latest/grdcontour.html

Aliases:

• A = annotation

• B = frame

• C = interval

• G = label_placement

• J = projection

• L = limit

• Q = cut

• R = region

• S = resample

• U = logo

• W = pen

Parameters

• grid (str or xarray.DataArray) – The file name of the input grid or the grid loaded as a DataArray.

• C (str or int) –

  Specify the contour lines to generate.

  • The filename of a CPT file where the color boundaries will be used as contour levels.

  • The filename of a 2 (or 3) column file containing the contour levels (col 1), (C)ontour or (A)nnotate (col 2), and optional angle (col 3)

  • A fixed contour interval cont_int or a single contour with +[cont_int]

• A (str, int, or list) –

  Specify or disable annotated contour levels, modifies annotated contours specified in -C.

  • Specify a fixed annotation interval annot_int or a single annotation level +[annot_int]

  • Disable all annotation with '-'

  • Optional label modifiers can be specified as a single string '[annot_int]+e' or with a list of options ([annot_int], 'e', 'f10p', 'gred').

• L (str or list of 2 ints) – Do no draw contours below low or above high, specify as string '[low]/[high]' or list [low,high].

• Q (string or int) – Do not draw contours with less than cut number of points.

• S (string or int) – Resample smoothing factor.

• projection (str) – Required if this is the first plot command. Select map projection.

• region (str or list) – Required if this is the first plot command. 'xmin/xmax/ymin/ymax[+r][+uunit]'. Specify the region of interest.

• frame (str or list) – Set map boundary frame and axes attributes.

• color (str) – Select color or pattern for filling of symbols or polygons. Default is no fill.

• pen (str) – Set pen attributes for lines or the outline of symbols.