Add input checks for grid

geoutils/pointcloud.py

@@ -12,7 +12,7 @@
 
 def _grid_pointcloud(
     pc: gpd.GeoDataFrame,
-    grid_coords: tuple[NDArrayNum, NDArrayNum],
+    grid_coords: tuple[NDArrayNum, NDArrayNum] = None,
     data_column_name: str = "b1",
     resampling: Literal["nearest", "linear", "cubic"] = "linear",
     dist_nodata_pixel: float = 1.0,
@@ -32,6 +32,20 @@ def _grid_pointcloud(
         expressed in number of pixels.
     """
 
+    # Input checks
+    if (
+            not isinstance(grid_coords, tuple)
+            or not (isinstance(grid_coords[0], np.ndarray) and grid_coords[0].ndim == 1)
+            or not (isinstance(grid_coords[1], np.ndarray) and grid_coords[1].ndim == 1)
+    ):
+        raise TypeError("Input grid coordinates must be 1D arrays.")
+
+    diff_x = np.diff(grid_coords[0])
+    diff_y = np.diff(grid_coords[1])
+
+    if not all(diff_x == diff_x[0]) and all(diff_y == diff_y[0]):
+        raise ValueError("Grid coordinates must be regular (equally spaced, independently along X and Y).")
+
     # 1/ Interpolate irregular point cloud on a regular grid
 
     # Get meshgrid coordinates