Run cog and add some help text.

docs/cli-reference.rst

@@ -772,8 +772,10 @@ See :ref:`cli_create_database`.
           sqlite-utils create-database trees.db
 
     Options:
-      --enable-wal  Enable WAL mode on the created database
+      --enable-wal           Enable WAL mode on the created database
-      -h, --help    Show this message and exit.
+      --init-spatialite      Enable SpatiaLite on the created database
+      --load-extension TEXT  SQLite extensions to load
+      -h, --help             Show this message and exit.
 
 
 create-table
@@ -1226,4 +1228,49 @@ See :ref:`cli_drop_view`.
       -h, --help             Show this message and exit.
 
 
+add-geometry-column
+===================
+
+::
+
+    Usage: sqlite-utils add-geometry-column [OPTIONS] DB_PATH TABLE COLUMN_NAME
+
+      Add a SpatiaLite geometry column to an existing table. Requires SpatiaLite
+      extension.
+
+      By default, this command will try to load the SpatiaLite extension from usual
+      paths. To load it from a specific path, use --load-extension.
+
+    Options:
+      -t, --type [POINT|LINESTRING|POLYGON|MULTIPOINT|MULTILINESTRING|MULTIPOLYGON|GEOMETRYCOLLECTION|GEOMETRY]
+                                      Specify a geometry type for this column.
+                                      [default: GEOMETRY]
+      --srid INTEGER                  Spatial Reference ID. See
+                                      https://spatialreference.org for details on
+                                      specific projections.  [default: 4326]
+      --dimensions TEXT               Coordinate dimensions. Use XYZ for three-
+                                      dimensional geometries.
+      --not-null                      Add a NOT NULL constraint.
+      --load-extension TEXT           SQLite extensions to load
+      -h, --help                      Show this message and exit.
+
+
+create-spatial-index
+====================
+
+::
+
+    Usage: sqlite-utils create-spatial-index [OPTIONS] DB_PATH TABLE COLUMN_NAME
+
+      Create a spatial index on a SpatiaLite geometry column. The table and geometry
+      column must already exist before trying to add a spatial index.
+
+      By default, this command will try to load the SpatiaLite extension from usual
+      paths. To load it from a specific path, use --load-extension.
+
+    Options:
+      --load-extension TEXT  SQLite extensions to load
+      -h, --help             Show this message and exit.
+
+
 .. [[[end]]]

sqlite_utils/cli.py

@@ -2746,10 +2746,24 @@ To load it from a specific path, use --load-extension.""",
         case_sensitive=False,
     ),
     default="GEOMETRY",
+    help="Specify a geometry type for this column.",
+    show_default=True,
 )
-@click.option("--srid", type=int, default=4326)
+@click.option(
-@click.option("--dimensions", "coord_dimension", type=str, default="XY")
+    "--srid",
-@click.option("--not-null", "not_null", is_flag=True)
+    type=int,
+    default=4326,
+    show_default=True,
+    help="Spatial Reference ID. See https://spatialreference.org for details on specific projections.",
+)
+@click.option(
+    "--dimensions",
+    "coord_dimension",
+    type=str,
+    default="XY",
+    help="Coordinate dimensions. Use XYZ for three-dimensional geometries.",
+)
+@click.option("--not-null", "not_null", is_flag=True, help="Add a NOT NULL constraint.")
 @load_extension_option
 def add_geometry_column(
     db_path,