Update/add grdlandmask parameters and aliases

doc/api/index.rst

@@ -92,8 +92,8 @@ Operations on grids:
     grdcut
     grdfill
     grdfilter
-    grdlandmask
     grdgradient
+    grdlandmask
     grdsample
     grdtrack
     xyz2grd

pygmt/src/grdlandmask.py

@@ -16,13 +16,17 @@
 
 @fmt_docstring
 @use_alias(
+    A="area_thresh",
+    D="resolution",
+    E="bordervalues",
     G="outgrid",
     I="spacing",
+    N="maskvalues",
     R="region",
     V="verbose",
     r="registration",
 )
-@kwargs_to_strings(R="sequence")
+@kwargs_to_strings(R="sequence", N="sequence", E="sequence")
 def grdlandmask(**kwargs):
     r"""
     Create a grid file with set values for land and water.
@@ -45,6 +49,38 @@ def grdlandmask(**kwargs):
         in.
     {I}
     {R}
+    {A}
+    resolution : str
+        *res*\[\ **+f**\]. Selects the resolution of the data set to use
+        ((**f**)ull, (**h**)igh, (**i**)ntermediate, (**l**)ow, or
+        (**c**)rude). The resolution drops off by ~80% between data sets.
+        [Default is **l**]. Append **+f** to automatically select a lower
+        resolution should the one requested not be available
+        [abort if not found]. Alternatively, choose (**a**)uto to automatically
+        select the best resolution given the chosen region. Note that because
+        the coastlines differ in details a node in a mask file using one
+        resolution is not guaranteed to remain inside [or outside] when a
+        different resolution is selected.
+    bordervalues : bool or str or float or list
+        Nodes that fall exactly on a polygon boundary should be
+        considered to be outside the polygon [Default considers them to be
+        inside]. Alternatively, append either a list of four values
+        [*cborder*, *lborder*, *iborder*, *pborder*] or just the single value
+        *bordervalue* (for the case when they should all be the same value).
+        This turns on the line-tracking mode. Now, after setting the mask
+        values specified via ``maskvalues`` we trace the lines and change the
+        node values for all cells traversed by a line to the corresponding
+        border value. Here, *cborder* is used for cells traversed by the
+        coastline, *lborder* for cells traversed by a lake outline, *iborder*
+        for islands-in-lakes outlines, and *pborder* for
+        ponds-in-islands-in-lakes outlines [Default is no line tracing].
+    maskvalues : str or list
+        [*wet*, *dry*] or [*ocean*, *land*, *lake*, *island*, *pond*].
+        Sets the values that will be assigned to nodes. Values can
+        be any number, including the textstring NaN
+        [Default is 0/1/0/1/0 (i.e., 0/1)]. Also select
+        ``bordervalues`` to let nodes exactly on feature boundaries be
+        considered outside [Default is inside].
     {V}
     {r}