add TreeCanopyHeight function

city_metrix/layers/__init__.py

@@ -14,3 +14,4 @@
 from .built_up_height import BuiltUpHeight
 from .average_net_building_height import AverageNetBuildingHeight
 from .open_buildings import OpenBuildings
+from .tree_canopy_hight import TreeCanopyHeight

city_metrix/layers/tree_canopy_hight.py

@@ -0,0 +1,29 @@
+from .layer import Layer, get_utm_zone_epsg, get_image_collection
+
+from dask.diagnostics import ProgressBar
+import xarray as xr
+import xee
+import ee
+
+
+class TreeCanopyHeight(Layer):
+
+    name = "tree_canopy_hight"
+
+    NO_DATA_VALUE = 0
+
+    def __init__(self, **kwargs):
+        super().__init__(**kwargs)
+
+    def get_data(self, bbox):
+        canopy_ht = ee.ImageCollection("projects/meta-forest-monitoring-okw37/assets/CanopyHeight")
+        # aggregate time series into a single image
+        canopy_ht = canopy_ht.reduce(ee.Reducer.mean()).rename("cover_code")
+
+
+
+
+        data = get_image_collection(ee.ImageCollection(canopy_ht), bbox, 1, "tree canopy hight")
+
+        return data.cover_code
+