Fix geometry type "2.5D Unknown" is not supported (#229)

CHANGES.md

@@ -4,7 +4,7 @@
 
 ### Improvements
 
-- Add automatic detection of 2.5D geometries in write_dataframe (#223)
+- Add automatic detection of 2.5D geometries in write_dataframe (#223, #229)
 - Add "driver" property to read_info result (#224)
 
 ## 0.5.1 (2023-01-26)

pyogrio/geopandas.py

@@ -362,7 +362,7 @@ def write_dataframe(
 
         if geometry_type is None:
             geometry_type = tmp_geometry_type
-            if has_z:
+            if has_z and geometry_type != "Unknown":
                 geometry_type = f"2.5D {geometry_type}"
 
     crs = None

pyogrio/tests/test_geopandas_io.py

@@ -891,14 +891,26 @@ def test_write_geometry_z_types(tmp_path, wkt, geom_types):
         ),
         ("Point Z + Point", "2.5D Point", True, ["Point Z (0 0 0)", "Point (0 0)"]),
         ("Point Z + None", "2.5D Point", False, ["Point Z (0 0 0)", None]),
+        (
+            "Point Z + LineString Z",
+            "Unknown",
+            False,
+            ["LineString Z (0 0 0, 1 1 0)", "Point Z (0 0 0)"],
+        ),
+        (
+            "Point Z + LineString",
+            "Unknown",
+            True,
+            ["LineString (0 0, 1 1)", "Point Z (0 0 0)"],
+        ),
     ],
 )
 def test_write_geometry_z_types_auto(
     tmp_path, ext, test_descr, exp_geometry_type, mixed_dimensions, wkt
 ):
     # Shapefile has some different behaviour that other file types
     if ext == ".shp":
-        if exp_geometry_type == "2.5D GeometryCollection":
+        if exp_geometry_type in ("2.5D GeometryCollection", "Unknown"):
             pytest.skip(f"ext {ext} doesn't support {exp_geometry_type}")
         elif exp_geometry_type == "2.5D MultiLineString":
             exp_geometry_type = "2.5D LineString"