Adds a --drop-empty-geometry-features option to kart export

CHANGELOG.md

@@ -8,6 +8,7 @@ _When adding new entries to the changelog, please include issue/PR numbers where
 ## Unreleased
 
 - Upgrade to PDAL 2.7 [#1005](https://github.com/koordinates/kart/pull/1005)
+- Adds a `--drop-empty-geometry-features` option to `kart export`. [#1007](https://github.com/koordinates/kart/pull/1007)
 
 ## 0.15.3
 

kart/tabular/export.py

@@ -152,6 +152,11 @@ def get_driver(destination_spec):
     is_flag=True,
     help="Skips export of those features where the geometry is null.",
 )
+@click.option(
+    "--drop-empty-geometry-features",
+    is_flag=True,
+    help='Skips export of those features where the geometry is either null or empty, such as "POLYGON EMPTY".',
+)
 @click.option(
     "--drop-geometry",
     "drop_geometry_column",
@@ -176,6 +181,7 @@ def table_export(
     primary_key_as_fid,
     override_geometry_type,
     drop_null_geometry_features,
+    drop_empty_geometry_features,
     drop_geometry_column,
     args,
 ):
@@ -285,6 +291,8 @@ def table_export(
                 geom = feature[geom_key]
                 if geom is None and drop_null_geometry_features:
                     continue
+                if (geom is None or geom.is_empty()) and drop_empty_geometry_features:
+                    continue
                 out_feature.SetGeometry(
                     _output_geometry(geom, geometry_transform, pk_value)
                 )