add abc for the geospatial extension

heat/bmi_geo.py

@@ -0,0 +1,31 @@
+from __future__ import annotations
+
+from abc import ABC
+from abc import abstractmethod
+from typing import Any
+
+import numpy as np
+from numpy.typing import NDArray
+
+
+class BmiGeo(ABC):
+
+    @abstractmethod
+    def initialize(self, filename: str=None) -> None:
+        ...
+
+    @abstractmethod
+    def get_grid_coordinate_names(self, grid: int) -> tuple[str, ...]:
+        ...
+
+    @abstractmethod
+    def get_grid_coordinate_units(self, grid: int) -> tuple[str, ...]:
+        ...
+
+    @abstractmethod
+    def get_grid_coordinate(self, grid: int, coordinate: str, values: NDArray[np.float64]) -> None:
+        ...
+
+    @abstractmethod
+    def get_grid_crs(self, grid: int) -> str:
+        ...