fix mypy

src/traffic/core/mixins.py

@@ -424,7 +424,9 @@ def geojson(self) -> dict[str, Any] | list[dict[str, Any]]:
         """
         return mapping(self.shape)  # type: ignore
 
-    def geoencode(self, **kwargs: Any) -> "alt.Chart":  # coverage: ignore
+    def geoencode(
+        self, **kwargs: Any
+    ) -> "alt.LayerChart | alt.Chart":  # coverage: ignore
         """Returns an `altair <http://altair-viz.github.io/>`_ encoding of the
         shape to be composed in an interactive visualization. Specific plot
         features, such as line widths, can be passed with the kwargs argument.
@@ -433,9 +435,8 @@ def geoencode(self, **kwargs: Any) -> "alt.Chart":  # coverage: ignore
         """
         import altair as alt
 
-        return alt.Chart(
-            alt.Data(values=self.geojson())  # type: ignore
-        ).mark_geoshape(stroke="#aaaaaa", **kwargs)
+        data = alt.Data(values=self.geojson())  # type: ignore
+        return alt.Chart(data).mark_geoshape(stroke="#aaaaaa", **kwargs)
 
     def project_shape(
         self, projection: None | pyproj.Proj | "crs.Projection" = None

src/traffic/core/structure.py

@@ -184,32 +184,31 @@ def runways(self) -> Optional[RunwayAirport]:
 
         return runways[self]
 
-    def geoencode(  # type: ignore
+    def geoencode(
         self,
-        footprint: Union[bool, Dict[str, Any]] = True,
-        runways: Union[bool, Dict[str, Any]] = True,
-        labels: Union[bool, Dict[str, Any]] = True,
-    ) -> "alt.Chart":  # coverage: ignore
+        footprint: Union[bool, Dict[str, Dict[str, Any]]] = True,
+        runways: Union[bool, Dict[str, Dict[str, Any]]] = True,
+        labels: Union[bool, Dict[str, Dict[str, Any]]] = True,
+        **kwargs: Any,
+    ) -> "alt.LayerChart":  # coverage: ignore
         import altair as alt
 
         base = alt.Chart(self).mark_geoshape()
         cumul = []
         if footprint:
-            params = dict(
+            params: Dict[str, Dict[str, Any]] = dict(
                 aerodrome=dict(color="gainsboro", opacity=0.5),
                 apron=dict(color="darkgray", opacity=0.5),
                 terminal=dict(color="#888888"),
                 hangar=dict(color="#888888"),
                 taxiway=dict(filled=False, color="silver", strokeWidth=1.5),
             )
             if isinstance(footprint, dict):
-                footprint = {**params, **footprint}
-            else:
-                footprint = params
+                params = {**params, **footprint}
 
-            for key, value in footprint.items():
+            for key, value in params.items():
                 cumul.append(
-                    base.transform_filter(  # type: ignore
+                    base.transform_filter(
                         f"datum.aeroway == '{key}'"
                     ).mark_geoshape(**value)
                 )
@@ -227,7 +226,7 @@ def geoencode(  # type: ignore
             raise TypeError(
                 "At least one of footprint, runways and labels must be True"
             )
-        return alt.layer(*cumul)  # type: ignore
+        return alt.layer(*cumul)
 
     def plot(  # type: ignore
         self,