Fix some antialiased parameters being ignored

Solves GitHub issue #501.

Author: molinav

CHANGELOG.md

@@ -22,6 +22,8 @@ https://semver.org/spec/v2.0.0.html
 - Fix flipped coastlines with pseudocylindrical projections when `lon_0`
   is greater than 0 deg (solves issues [#443] and [#463], thanks to
   @YilongWang).
+- Fix `antialiased` argument being ignored in `Basemap.drawcounties` and
+  `Basemap.readshapefile` (solves issue [#501], thanks to @TheFizzWare).
 
 ## [1.3.8] - 2023-08-18
 
@@ -1063,6 +1065,8 @@ https://github.com/matplotlib/basemap/issues/512
 https://github.com/matplotlib/basemap/issues/510
 [#505]:
 https://github.com/matplotlib/basemap/pull/505
+[#501]:
+https://github.com/matplotlib/basemap/issues/501
 [#491]:
 https://github.com/matplotlib/basemap/issues/491
 [#489]:

packages/basemap/src/mpl_toolkits/basemap/__init__.py

@@ -1990,7 +1990,7 @@ def drawcounties(self,linewidth=0.1,linestyle='solid',color='k',antialiased=1,
         county_info = self.readshapefile(gis_file,'counties',\
                       default_encoding='latin-1',drawbounds=drawbounds)
         counties = [coords for coords in self.counties]
-        counties = PolyCollection(counties)
+        counties = PolyCollection(counties, antialiaseds=(antialiased,))
         counties.set_linestyle(linestyle)
         counties.set_linewidth(linewidth)
         counties.set_edgecolor(color)
@@ -2203,7 +2203,7 @@ def readshapefile(self,shapefile,name,drawbounds=True,zorder=None,
             # get current axes instance (if none specified).
             ax = ax or self._check_ax()
             # make LineCollections for each polygon.
-            lines = LineCollection(coords,antialiaseds=(1,))
+            lines = LineCollection(coords,antialiaseds=(antialiased,))
             lines.set_color(color)
             lines.set_linewidth(linewidth)
             lines.set_label('_nolabel_')