diff --git a/Cargo.toml b/Cargo.toml
index c052c7a8b..cde508569 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,3 +8,9 @@ members = [
     "nusamai-mvt",
 ]
 resolver = "2"
+
+[profile.dev]
+opt-level = 1
+
+[profile.dev.package."*"]
+opt-level = 2
diff --git a/nusamai-plateau/citygml/src/geometric.rs b/nusamai-plateau/citygml/src/geometric.rs
index ef85bfa2d..9b04f4722 100644
--- a/nusamai-plateau/citygml/src/geometric.rs
+++ b/nusamai-plateau/citygml/src/geometric.rs
@@ -37,8 +37,8 @@ pub type GeometryRef = Vec<GeometryRefEntry>;
 #[derive(Debug, Default)]
 pub struct Geometries {
     pub vertices: Vec<[f64; 3]>,
-    pub polygons: MultiPolygon<'static, 1, u32>,
-    pub linestrings: MultiLineString<'static, 1, u32>,
+    pub multipolygons: MultiPolygon<'static, 1, u32>,
+    pub multilinestrings: MultiLineString<'static, 1, u32>,
 }
 
 /// Store for collecting vertices and polygons from GML.
@@ -81,8 +81,8 @@ impl GeometryCollector {
         }
         Geometries {
             vertices,
-            polygons: self.multi_polygon.clone(),
-            linestrings: self.multi_linestring.clone(),
+            multipolygons: self.multi_polygon.clone(),
+            multilinestrings: self.multi_linestring.clone(),
         }
     }
 
diff --git a/nusamai-plateau/citygml/src/parser.rs b/nusamai-plateau/citygml/src/parser.rs
index a8478ebaf..74f449a6c 100644
--- a/nusamai-plateau/citygml/src/parser.rs
+++ b/nusamai-plateau/citygml/src/parser.rs
@@ -315,10 +315,10 @@ impl<R: BufRead> SubTreeReader<'_, R> {
                             self.parse_composite_surface()?;
                             GeometryType::Surface
                         }
-                        // (Bound(GML_NS), b"OrientableSurface") => ...
-                        // (Bound(GML_NS), b"Polygon") => ...
-                        // (Bound(GML_NS), b"TriangulatedSurface") => ...
-                        // (Bound(GML_NS), b"Tin") => ...
+                        (Bound(GML_NS), b"OrientableSurface") => todo!(),
+                        (Bound(GML_NS), b"Polygon") => todo!(),
+                        (Bound(GML_NS), b"TriangulatedSurface") => todo!(),
+                        (Bound(GML_NS), b"Tin") => todo!(),
                         _ => {
                             return Err(ParseError::SchemaViolation(format!(
                                 "Unexpected element <{}>",
diff --git a/nusamai-plateau/examples/parse.rs b/nusamai-plateau/examples/parse.rs
index a15dec949..24dab2bba 100644
--- a/nusamai-plateau/examples/parse.rs
+++ b/nusamai-plateau/examples/parse.rs
@@ -122,6 +122,7 @@ fn main() {
             println!("elapsed time parsing: {:?}", parsing_time);
             total_parsing_time += parsing_time;
         }
+
         println!("total parsing time: {:?}", total_parsing_time);
     }
 
diff --git a/nusamai-plateau/tests/data/53393680_bldg_6697_lod4.2_op.gml.zst b/nusamai-plateau/tests/data/53393680_bldg_6697_lod4.2_op.gml.zst
new file mode 100755
index 000000000..7f7ba45e6
Binary files /dev/null and b/nusamai-plateau/tests/data/53393680_bldg_6697_lod4.2_op.gml.zst differ
diff --git a/nusamai-plateau/tests/test_simple.rs b/nusamai-plateau/tests/test_simple.rs
new file mode 100644
index 000000000..288969fca
--- /dev/null
+++ b/nusamai-plateau/tests/test_simple.rs
@@ -0,0 +1,70 @@
+use std::io::BufRead;
+
+use citygml::{CityGMLElement, CityGMLReader, ParseError, SubTreeReader};
+use nusamai_plateau::models::CityObject;
+
+#[derive(Default, Debug)]
+struct Counter {
+    city_objects: usize,
+    appearances: usize,
+    multipolygons: usize,
+}
+
+fn example_toplevel_dispatcher<R: BufRead>(
+    st: &mut SubTreeReader<R>,
+) -> Result<Counter, ParseError> {
+    let mut counter = Counter::default();
+
+    match st.parse_children(|st| match st.current_path() {
+        b"core:cityObjectMember" => {
+            let mut cityobj: CityObject = Default::default();
+            cityobj.parse(st)?;
+            let geometries = st.collect_geometries();
+            counter.city_objects += 1;
+            counter.multipolygons += geometries.multipolygons.len();
+            Ok(())
+        }
+        b"gml:boundedBy" => {
+            st.skip_current_element()?;
+            Ok(())
+        }
+        b"app:appearanceMember" => {
+            st.skip_current_element()?;
+            counter.appearances += 1;
+            Ok(())
+        }
+        other => Err(ParseError::SchemaViolation(format!(
+            "Unrecognized element {}",
+            String::from_utf8_lossy(other)
+        ))),
+    }) {
+        Ok(_) => Ok(counter),
+        Err(e) => {
+            println!("Err: {:?}", e);
+            Err(e)
+        }
+    }
+}
+
+#[test]
+fn simple_read() {
+    let reader = std::io::BufReader::new(
+        zstd::stream::Decoder::new(
+            std::fs::File::open("./tests/data/53393680_bldg_6697_lod4.2_op.gml.zst").unwrap(),
+        )
+        .unwrap(),
+    );
+
+    let mut xml_reader = quick_xml::NsReader::from_reader(reader);
+    match CityGMLReader::new().start_root(&mut xml_reader) {
+        Ok(mut st) => match example_toplevel_dispatcher(&mut st) {
+            Ok(counter) => {
+                assert_eq!(counter.city_objects, 1527);
+                assert_eq!(counter.multipolygons, 196148);
+                assert_eq!(counter.appearances, 1);
+            }
+            Err(e) => panic!("Err: {:?}", e),
+        },
+        Err(e) => panic!("Err: {:?}", e),
+    };
+}