sup3r.preprocessing.rasterizers.exo.ExoRasterizer

class ExoRasterizer(*, file_paths=None, source_file=None, feature=None, s_enhance=1, t_enhance=1, input_handler_name=None, input_handler_kwargs=None, cache_dir='./exo_cache/', chunks='auto', distance_upper_bound=None, verbose=False)

Bases: BaseExoRasterizer

Class to extract high-res (4km+) data rasters for new spatially-enhanced datasets (e.g. GCM files after spatial enhancement) using nearest neighbor mapping and aggregation from NREL datasets (e.g. WTK or NSRDB)

Parameters:

• file_paths (str | list) – A single source h5 file to extract raster data from or a list of netcdf files with identical grid. The string can be a unix-style file path which will be passed through glob.glob. This is typically low-res WRF output or GCM netcdf data files that is source low-resolution data intended to be sup3r resolved.

• source_file (str) – Filepath to source data file to get hi-res exogenous data from which will be mapped to the enhanced grid of the file_paths input. Pixels from this source_file will be mapped to their nearest low-res pixel in the file_paths input. Accordingly, source_file should be a significantly higher resolution than file_paths. Warnings will be raised if the low-resolution pixels in file_paths do not have unique nearest pixels from source_file. File format can be .h5 for ExoRasterizerH5 or .nc for ExoRasterizerNC

• feature (str) – Name of exogenous feature to rasterize.

• s_enhance (int) – Factor by which the Sup3rGan model will enhance the spatial dimensions of low resolution data from file_paths input. For example, if getting topography data, file_paths has 100km data, and s_enhance is 4, this class will output a topography raster corresponding to the file_paths grid enhanced 4x to ~25km

• t_enhance (int) – Factor by which the Sup3rGan model will enhance the temporal dimension of low resolution data from file_paths input. For example, if getting “sza” data, file_paths has hourly data, and t_enhance is 4, this class will output an “sza” raster corresponding to file_paths, temporally enhanced 4x to 15 min

• input_handler_name (str) – data handler class to use for input data. Provide a string name to match a Rasterizer. If None the correct handler will be guessed based on file type and time series properties.

• input_handler_kwargs (dict | None) – Any kwargs for initializing the input_handler_name class.

• cache_dir (str | ‘./exo_cache’) – Directory to use for caching rasterized data.

• chunks (str | dict) – Dictionary of dimension chunk sizes for returned exo data. e.g. {‘time’: 100, ‘south_north’: 100, ‘west_east’: 100}. This can also just be “auto”. This is passed to .chunk() before returning exo data through .data attribute

• distance_upper_bound (float | None) – Maximum distance to map high-resolution data from source_file to the low-resolution file_paths input. None (default) will calculate this based on the median distance between points in source_file

• max_workers (int) – Number of workers used for writing data to cache files. Gets passed to Cacher.write_netcdf.

• verbose (bool) – Whether to log output as each chunk is written to cache file.

Override parent class to return type specific class based on source_file

Methods

get_data()	Get a raster of source values corresponding to the high-resolution grid (the file_paths input grid * s_enhance * t_enhance).
get_distance_upper_bound()	Maximum distance (float) to map high-resolution data from source_file to the low-resolution file_paths input.

Attributes

TypeSpecificClasses
cache_dir
cache_file	Get cache file name
chunks
coords	Get coords dictionary for initializing xr.Dataset.
data	Get a raster of source values corresponding to the high-resolution grid (the file_paths input grid * s_enhance * t_enhance).
distance_upper_bound
feature
file_paths
hr_lat_lon	Lat lon grid for data in format (spatial_1, spatial_2, 2) Lat/Lon array with same ordering in last dimension.
hr_shape	Get the high-resolution spatiotemporal shape
hr_time_index	Get the full time index for aggregated source data
input_handler_kwargs
input_handler_name
lr_shape	Get the low-resolution spatiotemporal shape
max_workers
nn	Get the nearest neighbor indices.
s_enhance
source_data	Get the 1D array of source data from the source_file_h5
source_file
source_handler	Get the Loader object that handles the exogenous data file.
source_lat_lon	Get the 2D array (n, 2) of lat, lon data from the source_file_h5
t_enhance
tree	Get the KDTree built on the target lat lon data from the file_paths input with s_enhance
verbose

property cache_file

Get cache file name

Returns:

cache_fp (str) – Name of cache file. This is a netcdf file which will be saved with Cacher and loaded with Loader

property coords

Get coords dictionary for initializing xr.Dataset.

property data

Get a raster of source values corresponding to the high-resolution grid (the file_paths input grid * s_enhance * t_enhance). The shape is (lats, lons, temporal, 1)

get_data()

Get a raster of source values corresponding to the high-resolution grid (the file_paths input grid * s_enhance * t_enhance). The shape is (lats, lons, 1)

get_distance_upper_bound()

Maximum distance (float) to map high-resolution data from source_file to the low-resolution file_paths input.

property hr_lat_lon

Lat lon grid for data in format (spatial_1, spatial_2, 2) Lat/Lon array with same ordering in last dimension. This corresponds to the enhanced meta data from the file_paths input * s_enhance.

Returns:

ndarray

property hr_shape

Get the high-resolution spatiotemporal shape

property hr_time_index

Get the full time index for aggregated source data

property lr_shape

Get the low-resolution spatiotemporal shape

property nn

Get the nearest neighbor indices. This uses a single neighbor by default

abstract property source_data

Get the 1D array of source data from the source_file_h5

property source_handler

Get the Loader object that handles the exogenous data file.

property source_lat_lon

Get the 2D array (n, 2) of lat, lon data from the source_file_h5

property tree

Get the KDTree built on the target lat lon data from the file_paths input with s_enhance