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Get crs and transform from xarray rio accessor in array_to_memory_file #679

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Feb 13, 2024
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Get crs and transform from xarray rio accessor in array_to_memory_file #679

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7607591
Get crs and transform from rio accessor
lopezvoliver Feb 13, 2024
73c0556
Updated notebook (xarray section)
lopezvoliver Feb 13, 2024
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18 changes: 1 addition & 17 deletions examples/notebooks/89_image_array_viz.ipynb
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Original file line number Diff line number Diff line change
Expand Up @@ -227,22 +227,6 @@
"masked_array = xr.where(array < 2000, 0, 1)"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"Create an in-memory raster dataset from the elevation class array and use the projection and extent of the DEM."
]
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {},
"outputs": [],
"source": [
"image = leafmap.array_to_image(masked_array, source=dem)"
]
},
{
"cell_type": "markdown",
"metadata": {},
Expand All @@ -258,7 +242,7 @@
"source": [
"m = leafmap.Map()\n",
"m.add_raster(dem, colormap=\"terrain\", layer_name=\"DEM\")\n",
"m.add_raster(image, colormap=\"coolwarm\", layer_name=\"Classified DEM\")\n",
"m.add_raster(masked_array, colormap=\"coolwarm\", layer_name=\"Classified DEM\")\n",
"m"
]
}
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13 changes: 11 additions & 2 deletions leafmap/common.py
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Original file line number Diff line number Diff line change
Expand Up @@ -10293,6 +10293,15 @@ def array_to_memory_file(
array = (
array.isel(time=0).rename({y_dim: "y", x_dim: "x"}).transpose("y", "x")
)
if hasattr(array, "rio"):
if hasattr(array.rio, "crs"):
crs = array.rio.crs
if hasattr(array.rio, "transform"):
transform = array.rio.transform()
elif source is None:
if hasattr(array, "encoding"):
if "source" in array.encoding:
source = array.encoding["source"]
array = array.values

if array.ndim == 3 and transpose:
Expand All @@ -10305,14 +10314,14 @@ def array_to_memory_file(
if compress is None:
compress = src.compression
else:
if cellsize is None:
raise ValueError("cellsize must be provided if source is not provided")
if crs is None:
raise ValueError(
"crs must be provided if source is not provided, such as EPSG:3857"
)

if transform is None:
if cellsize is None:
raise ValueError("cellsize must be provided if source is not provided")
# Define the geotransformation parameters
xmin, ymin, xmax, ymax = (
0,
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