Package org.apache.sedona.core.formatMapper.netcdfParser

Class SerNetCDFUtils

java.lang.Object

org.apache.sedona.core.formatMapper.netcdfParser.SerNetCDFUtils

All Implemented Interfaces:

Serializable

public class SerNetCDFUtils
extends Object
implements Serializable

The Class SerNetCDFUtils.

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
SerNetCDFUtils()

Method Summary

Modifier and Type	Method	Description
static Double	getDataAsym(ucar.ma2.Array array, int i, int j, int offset, int increment)	Gets the data from asymmetric mapping.
static Double	getDataSym(ucar.ma2.Array array, int i, int j)	Gets the data from symmetric mapping.
static Integer	getDimensionSize(ucar.nc2.dataset.NetcdfDataset netcdfFile, String rowDim)	Gets the size of a dimension of a NetCDF file.
static ucar.ma2.Array	getNetCDF2DArray(ucar.nc2.dataset.NetcdfDataset netcdfFile, String variable)	Extracts a variable's data from a NetCDF.
static ucar.nc2.dataset.NetcdfDataset	loadDFSNetCDFDataSet(String dfsUri, String location, Integer bufferSize)	Loads a NetCDF Dataset from HDFS.
static ucar.nc2.dataset.NetcdfDataset	loadNetCDFDataSet(String url)	Loads a NetCDF Dataset from a URL.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

SerNetCDFUtils

public SerNetCDFUtils()

Method Details

getNetCDF2DArray

public static ucar.ma2.Array getNetCDF2DArray(ucar.nc2.dataset.NetcdfDataset netcdfFile,
 String variable)

Extracts a variable's data from a NetCDF.

If the variable is not found then an Array with the element 0.0 is returned with shape (1,1). Note that all dimensions of size 1 are eliminated. For example the array shape (21, 5, 1, 2) is reduced to (21, 5, 2) since the 3rd dimension only ranges over a single value.

Parameters:

netcdfFile - The NetCDF file.

variable - The variable whose data we want to extract.

Returns:

2D Data array.

getDataAsym

public static Double getDataAsym(ucar.ma2.Array array,
 int i,
 int j,
 int offset,
 int increment)

Gets the data from asymmetric mapping. One geolocation maps more than one observation. Or, one observation maps more than one geolocation.

Parameters:

array - the array

i - the i

j - the j

offset - the offset

increment - the increment

Returns:

the data asym

getDataSym

public static Double getDataSym(ucar.ma2.Array array,
 int i,
 int j)

Gets the data from symmetric mapping. One geolocation maps one observation.

Parameters:

array - the array

i - the i

j - the j

Returns:

the data sym

loadNetCDFDataSet

public static ucar.nc2.dataset.NetcdfDataset loadNetCDFDataSet(String url)

Loads a NetCDF Dataset from a URL.

Parameters:

url - the url

Returns:

the netcdf dataset

loadDFSNetCDFDataSet

public static ucar.nc2.dataset.NetcdfDataset loadDFSNetCDFDataSet(String dfsUri,
 String location,
 Integer bufferSize)

Loads a NetCDF Dataset from HDFS.

Parameters:

dfsUri - HDFS URI(eg. hdfs://master:9000/)

location - File path on HDFS

bufferSize - The size of the buffer to be used

Returns:

the netcdf dataset

getDimensionSize

public static Integer getDimensionSize(ucar.nc2.dataset.NetcdfDataset netcdfFile,
 String rowDim)

Gets the size of a dimension of a NetCDF file.

Parameters:

netcdfFile - the netcdf file

rowDim - the row dim

Returns:

the dimension size