Add polygon helper utilities

pygmt_helper/examples/polygons.py

@@ -0,0 +1,54 @@
+from pygmt_helper import plotting
+
+import pygmt
+import shapely
+
+region = (170, 175, -45, -40)
+projection = "M10c"
+
+fig = plotting.gen_region_fig(
+    region=region,
+    title="Test Map",
+    subtitle="Test Subtitle",
+    projection=projection,
+    config_options={"MAP_FRAME_PEN": "2p"},
+)
+
+
+test_polygon = shapely.Polygon(
+          [
+            [
+              170.50175961398025,
+              -43.43397759003748
+            ],
+            [
+              170.03920443841383,
+              -43.88211179838194
+            ],
+            [
+              170.61151846919984,
+              -44.265124035523286
+            ],
+            [
+              171.81886587660995,
+              -43.74633923909617
+            ],
+            [
+              171.00351438069657,
+              -43.24605985518982
+            ],
+            [
+              170.50175961398025,
+              -43.43397759003748
+            ]
+        ],
+
+)
+
+
+plotting.plot_geometry(fig, test_polygon, pen='1p,blue,-', crs='4326')
+plotting.label_polygon_on_boundary(fig, test_polygon, 'Outside!', align=True, projection=projection, fill='white', pen='1p,black', offset='0.3c')
+plotting.label_geometry_inside(fig, test_polygon, 'Inside!', fill='white', pen='1p,black')
+plotting.label_polygon_at(fig, 0.35, test_polygon, 'Around!', align=True, projection=projection, fill='white', pen='1p,black', offset='0.3c', justify='TC')
+
+fig.savefig('polygons.jpeg')