internal Grib1WaveSpectra2DDirFreq(System.IO.Stream raf)
{
SupportClass.Skip(raf, 4);
byte[] ver = GribNumbers.ReadBytes(raf, 4);
System.Text.Encoding enc = System.Text.Encoding.ASCII;
version = enc.GetString(ver);
SupportClass.Skip(raf, 2);
directionNumber = raf.ReadByte();
frequencyNumber = raf.ReadByte();
numberOfDirections = raf.ReadByte();
numberOfFrequencies = raf.ReadByte();
dirScaleFactor = GribNumbers.int4(raf);
freqScaleFactor = GribNumbers.int4(raf);
SupportClass.Skip(raf, 37);
directions = new double[numberOfDirections];
frequencies = new double[numberOfFrequencies];
for (int i = 0; i < numberOfDirections; i++)
{
int val = GribNumbers.int4(raf);
directions[i] = (double)val / (double)dirScaleFactor;
}
for (int i = 0; i < numberOfFrequencies; i++)
{
int val = GribNumbers.int4(raf);
frequencies[i] = (double)val / (double)freqScaleFactor;
}
}
// *** constructors *******************************************************
/// <summary> Constructs a <tt>Grib2LocalUseSection</tt> object from a raf.</summary>
/// <param name="raf">
/// </param>
/// <throws> IOException if raf contains no valid GRIB product </throws>
//UPGRADE_TODO: Class 'java.io.RandomAccessFile' was converted to 'System.IO.FileStream' which has a different behavior. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1073_javaioRandomAccessFile'"
public Grib2LocalUseSection(System.IO.FileStream raf)
{
// octets 1-4 (Length of GDS)
length = GribNumbers.int4(raf);
//System.out.println( "LUS length=" + length );
section = raf.ReadByte(); // This is section 2
//System.out.println( "LUS Local Use is 2, section=" + section );
if (section != 2)
{
// no local use section
SupportClass.Skip(raf, -5);
return;
}
else
{
//SupportClass.Skip(raf, length - 5);
bytes = new byte[length - 5];
int nb = raf.Read(bytes, 0, length - 5);
if (nb != length - 5)
{
throw new NoValidGribException("Failed to read Local Use Section data");
}
}
} // end of Grib2LocalUseSection
private int Xlength; // length of the x axis
// *** constructors *******************************************************
/// <summary> Constructor for a Grib2 Data Section.</summary>
/// <param name="getData">
/// </param>
/// <param name="raf">
/// </param>
/// <param name="gds">
/// </param>
/// <param name="drs">
/// </param>
/// <param name="bms">
/// </param>
/// <throws> IOException </throws>
//UPGRADE_TODO: Class 'java.io.RandomAccessFile' was converted to 'System.IO.FileStream' which has a different behavior. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1073_javaioRandomAccessFile'"
public Grib2DataSection(bool getData, System.IO.FileStream raf, Grib2GridDefinitionSection gds, Grib2DataRepresentationSection drs, Grib2BitMapSection bms)
{
//System.out.println( "raf.FilePointer=" + raf.FilePointer() );
// octets 1-4 (Length of DS)
length = GribNumbers.int4(raf);
//System.out.println( "DS length=" + length );
//System.out.println( "DS calculated end=" + ( raf.getFilePointer() + length -4 ));
// octet 5 section 7
section = raf.ReadByte();
//System.out.println( "DS is 7, section=" + section );
if (!getData)
{
// skip data read
//System.out.println( "raf.position before reposition="+raf.getFilePointer());
//System.out.println( "raf.length=" + raf.length() );
// sanity check for erronous ds length
if (length > 0 && length < raf.Length)
{
SupportClass.Skip(raf, length - 5);
//System.out.println( "raf.skipBytes = " + (length -5) );
}
else
{
length = 5; // only read length and section
}
//System.out.println( "raf.position after skip=" + raf.getFilePointer() );
return;
}
int dtn = drs.DataTemplateNumber;
//System.out.println( "DS dtn=" + dtn );
if (dtn == 0 || dtn == 1)
{
// 0: Grid point data - simple packing
// 1: Matrix values - simple packing
simpleUnpacking(raf, gds, drs, bms);
}
else if (dtn == 2)
{
// 2:Grid point data - complex packing
complexUnpacking(raf, gds, drs);
}
else if (dtn == 3)
{
// 3: complex packing with spatial differencing
complexUnpackingWithSpatial(raf, gds, drs);
}
else if (dtn == 40 || dtn == 40000)
{
// JPEG 2000 Stream Format
jpeg2000Unpacking(raf, gds, drs, bms);
}
} // end Grib2DataSection
/// <summary> Creates an ensemble object for the product PDS.</summary>
/// <param name="raf">RandomAccessFile.
/// </param>
/// <param name="parameterNumber">
/// </param>
/// <throws> IOException </throws>
//UPGRADE_TODO: Class 'java.io.RandomAccessFile' was converted to 'System.IO.FileStream' which has a different behavior. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1073_javaioRandomAccessFile'"
internal Grib1Ensemble(System.IO.Stream raf, int parameterNumber)
{
// skip 12 bytes to start of ensemble
SupportClass.Skip(raf, 12);
// octet 41 id's ensemble
int app = raf.ReadByte();
if (app != 1)
{
System.Console.Out.WriteLine("not ensemble product");
return;
}
// octet 42 Type
eType = raf.ReadByte();
// octet 43 Identification number
eId = raf.ReadByte();
// octet 44 Product Identifier
eProd = raf.ReadByte();
// octet 45 Spatial Identifier
eSpatial = raf.ReadByte();
if (parameterNumber == 191 || parameterNumber == 192)
{
// octet 46 Probability product definition
epd = raf.ReadByte();
// octet 47 Probability type
ept = raf.ReadByte();
// octet 48-51 Probability lower limit
epll = GribNumbers.int4(raf);
// octet 52-55 Probability upper limit
epul = GribNumbers.int4(raf);
// octet 56-60 reserved
int reserved = GribNumbers.int4(raf);
if (eType == 4 || eType == 5)
{
// octet 61 Ensemble size
eSize = raf.ReadByte();
// octet 62 Cluster size
eCSize = raf.ReadByte();
// octet 63 Number of clusters
eCNumber = raf.ReadByte();
// octet 64 Clustering Method
eCMethod = raf.ReadByte();
// octet 65-67 Northern latitude of clustering domain
nLat = GribNumbers.int3(raf);
// octet 68-70 Southern latitude of clustering domain
sLat = GribNumbers.int3(raf);
// octet 71-73 Eastern latitude of clustering domain
eLat = GribNumbers.int3(raf);
// octet 74-76 Western latitude of clustering domain
wLat = GribNumbers.int3(raf);
if (eType == 4)
{
// octets 77-86 Cluster Membership
cm = new sbyte[10];
SupportClass.ReadInput(raf, cm, 0, cm.Length);
}
}
}
}
// *** constructors *******************************************************
/// <summary> Constructs a <tt>Grib1ProductDefinitionSection</tt> object from a raf.
///
/// </summary>
/// <param name="raf">with PDS content
///
/// </param>
/// <throws> NotSupportedException if raf contains no valid GRIB file </throws>
//UPGRADE_TODO: Class 'java.io.RandomAccessFile' was converted to 'System.IO.FileStream' which has a different behavior. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1073_javaioRandomAccessFile'"
public Grib1ProductDefinitionSection(System.IO.FileStream raf)
{
// octets 1-3 PDS length
length = (int)GribNumbers.uint3(raf);
//System.out.println( "PDS length = " + length );
// Paramter table octet 4
table_version = raf.ReadByte();
// Center octet 5
center_id = raf.ReadByte();
// octet 6 Generating Process - See Table A
process_id = raf.ReadByte();
// octet 7 (id of grid type) - not supported yet
grid_id = raf.ReadByte();
//octet 8 (flag for presence of GDS and BMS)
int exists = raf.ReadByte();
//BKSystem.IO.BitStream s = new BKSystem.IO.BitStream(8);
// s.WriteByte((byte)raf.ReadByte());
// s.Position = 0;
// sbyte exists;
// s.Read(out exists);
// bms_exists = (exists & 64) == 64;
gds_exists = (exists & 128) == 128;
bms_exists = (exists & 64) == 64;
// octet 9 (parameter and unit)
parameterNumber = raf.ReadByte();
// octets 10-12 (level)
int levelType = raf.ReadByte();
int levelValue1 = raf.ReadByte();
int levelValue2 = raf.ReadByte();
level = new GribPDSLevel(levelType, levelValue1, levelValue2);
// octets 13-17 (base time for reference time)
int year = raf.ReadByte();
int month = raf.ReadByte();
int day = raf.ReadByte();
int hour = raf.ReadByte();
int minute = raf.ReadByte();
// get info for forecast time
// octet 18 Forecast time unit
timeUnit = raf.ReadByte();
switch (timeUnit)
{
case 0: // minute
tUnit = "minute";
break;
case 1: // hours
tUnit = "hour";
break;
case 2: // day
tUnit = "day";
break;
case 3: // month
tUnit = "month";
break;
case 4: //1 year
tUnit = "1year";
break;
case 5: // decade
tUnit = "decade";
break;
case 6: // normal
tUnit = "day";
break;
case 7: // century
tUnit = "century";
break;
case 10: //3 hours
tUnit = "3hours";
break;
case 11: // 6 hours
tUnit = "6hours";
break;
case 12: // 12 hours
tUnit = "12hours";
break;
case 254: // second
tUnit = "second";
break;
default:
System.Console.Error.WriteLine("PDS: Time Unit " + timeUnit + " is not yet supported");
break;
}
// octet 19 & 20 used to create Forecast time
p1 = raf.ReadByte();
p2 = raf.ReadByte();
// octet 21 (time range indicator)
timeRangeValue = raf.ReadByte();
// forecast time is always at the end of the range
//System.out.println( "PDS timeRangeValue =" + timeRangeValue );
switch (timeRangeValue)
{
case 0:
timeRange = "product valid at RT + P1";
forecastTime = p1;
break;
case 1:
timeRange = "product valid for RT, P1=0";
forecastTime = 0;
break;
case 2:
timeRange = "product valid from (RT + P1) to (RT + P2)";
forecastTime = p2;
break;
case 3:
timeRange = "product is an average between (RT + P1) to (RT + P2)";
forecastTime = p2;
break;
case 4:
timeRange = "product is an accumulation between (RT + P1) to (RT + P2)";
forecastTime = p2;
break;
case 5:
timeRange = "product is the difference (RT + P2) - (RT + P1)";
forecastTime = p2;
break;
case 6:
timeRange = "product is an average from (RT - P1) to (RT - P2)";
forecastTime = -p2;
break;
case 7:
timeRange = "product is an average from (RT - P1) to (RT + P2)";
forecastTime = p2;
break;
case 10:
timeRange = "product valid at RT + P1";
// p1 really consists of 2 bytes p1 and p2
forecastTime = p1 = GribNumbers.int2(p1, p2);
p2 = 0;
break;
case 51:
timeRange = "mean value from RT to (RT + P2)";
forecastTime = p2;
break;
default:
System.Console.Error.WriteLine("PDS: Time Range Indicator " + timeRangeValue + " is not yet supported");
break;
}
// octet 22 & 23
int avgInclude = GribNumbers.int2(raf);
// octet 24
int avgMissing = raf.ReadByte();
// octet 25
int century = raf.ReadByte() - 1;
// octet 26, sub center
subcenter_id = raf.ReadByte();
// octets 27-28 (decimal scale factor)
decscale = GribNumbers.int2(raf);
refTime = new DateTime(century * 100 + year, month, day, hour, minute, 0, DateTimeKind.Utc);
baseTime = refTime;
referenceTime = refTime.ToString(dateFormat);
//System.out.println( "PDS referenceTime raw = " +
//(century * 100 + year) +"-" +
//month + "-" + day + "T" + hour +":" + minute +":00Z" );
//System.out.println( "PDS referenceTime = " + referenceTime );
// TODO
/*
* parameter_table = GribPDSParamTable.getParameterTable(center_id, subcenter_id, table_version);
* parameter = parameter_table.getParameter(parameterNumber);
*/
parameter = new Parameter();
if (center_id == 7 && subcenter_id == 2)
{
// ensemble product
epds = new Grib1Ensemble(raf, parameterNumber);
}
// Special handling of 2D Wave Spectra (single)
else if (table_version == 140 && parameterNumber == 251)
{
SupportClass.Skip(raf, 12);
int extDef = raf.ReadByte(); // Extension definition
// Read ECMWF extension for 2D wave spectra single
if (extDef == 13)
{
waveSpectra2DDirFreq = new Grib1WaveSpectra2DDirFreq(raf);
}
}
else if (length != 28)
{
// check if all bytes read in section
//lengthErr = true;
int extra;
for (int i = 29; i <= length; i++)
{
extra = raf.ReadByte();
}
}
} // end Grib1ProductDefinitionSection
// *** constructors *******************************************************
/// <summary> Constructs a Grib2ProductDefinitionSection object from a raf.
///
/// </summary>
/// <param name="raf">RandomAccessFile with PDS content
///
/// </param>
/// <throws> IOException if raf contains no valid GRIB file </throws>
//UPGRADE_TODO: Class 'java.io.RandomAccessFile' was converted to 'System.IO.FileStream' which has a different behavior. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1073_javaioRandomAccessFile'"
public Grib2ProductDefinitionSection(System.IO.FileStream raf)
{
// octets 1-4 (Length of PDS)
length = GribNumbers.int4(raf);
//System.out.println( "PDS length=" + length );
// octet 5
section = raf.ReadByte();
//System.out.println( "PDS is 4, section=" + section );
// octet 6-7
coordinates = GribNumbers.int2(raf);
//System.out.println( "PDS coordinates=" + coordinates );
// octet 8-9
productDefinition = GribNumbers.int2(raf);
//System.out.println( "PDS productDefinition=" + productDefinition );
switch (productDefinition)
{
// Analysis or forecast at a horizontal level or in a horizontal
// layer at a point in time
case 0:
case 1:
case 2:
case 3:
case 4:
case 5:
case 6:
case 7:
case 8: {
// octet 10
parameterCategory = raf.ReadByte();
//System.out.println( "PDS parameterCategory=" +
//parameterCategory );
// octet 11
parameterNumber = raf.ReadByte();
//System.out.println( "PDS parameterNumber=" + parameterNumber );
// octet 12
typeGenProcess = raf.ReadByte();
//System.out.println( "PDS typeGenProcess=" + typeGenProcess );
// octet 13
backGenProcess = raf.ReadByte();
//System.out.println( "PDS backGenProcess=" + backGenProcess );
// octet 14
analysisGenProcess = raf.ReadByte();
//System.out.println( "PDS analysisGenProcess=" +
//analysisGenProcess );
// octet 15-16
hoursAfter = GribNumbers.int2(raf);
//System.out.println( "PDS hoursAfter=" + hoursAfter );
// octet 17
minutesAfter = raf.ReadByte();
//System.out.println( "PDS minutesAfter=" + minutesAfter );
// octet 18
timeRangeUnit = raf.ReadByte();
//System.out.println( "PDS timeRangeUnit=" + timeRangeUnit );
// octet 19-22
forecastTime = GribNumbers.int4(raf);
//System.out.println( "PDS forecastTime=" + forecastTime );
// octet 23
typeFirstFixedSurface = raf.ReadByte();
//System.out.println( "PDS typeFirstFixedSurface=" +
// typeFirstFixedSurface );
// octet 24
int scaleFirstFixedSurface = raf.ReadByte();
//System.out.println( "PDS scaleFirstFixedSurface=" +
// scaleFirstFixedSurface );
// octet 25-28
int valueFirstFixedSurface = GribNumbers.int4(raf);
//System.out.println( "PDS valueFirstFixedSurface=" +
// valueFirstFixedSurface );
//UPGRADE_WARNING: Data types in Visual C# might be different. Verify the accuracy of narrowing conversions. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1042'"
FirstFixedSurfaceValue = (float)((scaleFirstFixedSurface == 0 || valueFirstFixedSurface == 0)?valueFirstFixedSurface:System.Math.Pow(valueFirstFixedSurface, -scaleFirstFixedSurface));
// octet 29
typeSecondFixedSurface = raf.ReadByte();
//System.out.println( "PDS typeSecondFixedSurface=" +
//typeSecondFixedSurface );
// octet 30
int scaleSecondFixedSurface = raf.ReadByte();
//System.out.println( "PDS scaleSecondFixedSurface=" +
//scaleSecondFixedSurface );
// octet 31-34
int valueSecondFixedSurface = GribNumbers.int4(raf);
//System.out.println( "PDS valueSecondFixedSurface=" +
//valueSecondFixedSurface );
//UPGRADE_WARNING: Data types in Visual C# might be different. Verify the accuracy of narrowing conversions. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1042'"
SecondFixedSurfaceValue = (float)((scaleSecondFixedSurface == 0 || valueSecondFixedSurface == 0)?valueSecondFixedSurface:System.Math.Pow(valueSecondFixedSurface, -scaleSecondFixedSurface));
// Individual ensemble forecast, control and perturbed, at a
// horizontal level or in a horizontal layer at a point in time
if (productDefinition == 1)
{
System.Console.Out.WriteLine("PDS productDefinition == 1 not done");
//Derived forecast based on all ensemble members at a horizontal
// level or in a horizontal layer at a point in time
}
else if (productDefinition == 2)
{
System.Console.Out.WriteLine("PDS productDefinition == 2 not done");
// Derived forecasts based on a cluster of ensemble members over
// a rectangular area at a horizontal level or in a horizontal layer
// at a point in time
}
else if (productDefinition == 3)
{
System.Console.Out.WriteLine("PDS productDefinition == 3 not done");
// Derived forecasts based on a cluster of ensemble members
// over a circular area at a horizontal level or in a horizontal
// layer at a point in time
}
else if (productDefinition == 4)
{
System.Console.Out.WriteLine("PDS productDefinition == 4 not done");
// Probability forecasts at a horizontal level or in a horizontal
// layer at a point in time
}
else if (productDefinition == 5)
{
System.Console.Out.WriteLine("PDS productDefinition == 5 not done");
// Percentile forecasts at a horizontal level or in a horizontal layer
// at a point in time
}
else if (productDefinition == 6)
{
System.Console.Out.WriteLine("PDS productDefinition == 6 not done");
// Analysis or forecast error at a horizontal level or in a horizontal
// layer at a point in time
}
else if (productDefinition == 7)
{
System.Console.Out.WriteLine("PDS productDefinition == 7 not done");
// Average, accumulation, and/or extreme values at a horizontal
// level or in a horizontal layer in a continuous or non-continuous
// time interval
}
else if (productDefinition == 8)
{
//System.out.println( "PDS productDefinition == 8 " );
// 35-41 bytes
int year = GribNumbers.int2(raf);
int month = (raf.ReadByte()) - 1;
int day = raf.ReadByte();
int hour = raf.ReadByte();
int minute = raf.ReadByte();
int second = raf.ReadByte();
//System.out.println( "PDS date:" + year +":" + month +
//":" + day + ":" + hour +":" + minute +":" + second );
// 42 - 46
int timeRanges = raf.ReadByte();
//System.out.println( "PDS timeRanges=" + timeRanges ) ;
int missingDataValues = GribNumbers.int4(raf);
//System.out.println( "PDS missingDataValues=" + missingDataValues ) ;
// 47 - 48
int outmostTimeRange = raf.ReadByte();
//System.out.println( "PDS outmostTimeRange=" + outmostTimeRange )
;
int missing = raf.ReadByte();
//System.out.println( "PDS missing=" + missing ) ;
// 49 - 53
int statisticalProcess = raf.ReadByte();
//System.out.println( "PDS statisticalProcess=" + statisticalProcess ) ;
int timeIncrement = GribNumbers.int4(raf);
//System.out.println( "PDS timeIncrement=" + timeIncrement ) ;
// 54 - 58
int indicatorTR = raf.ReadByte();
//System.out.println( "PDS indicatorTR=" + indicatorTR ) ;
int lengthTR = GribNumbers.int4(raf);
if (timeRanges == 1)
{
this.forecastTime += calculateIncrement(statisticalProcess, timeIncrement);
}
//System.out.println( "PDS lengthTR=" + lengthTR ) ;
//int indicatorSF = raf.read();
//System.out.println( "PDS indicatorSF=" + indicatorSF ) ;
//int incrementSF = GribNumbers.int4( raf );
//System.out.println( "PDS incrementSF=" + incrementSF ) ;
}
break;
} // cases 0-8
// Radar product
case 20: {
parameterCategory = raf.ReadByte();
//System.out.println( "PDS parameterCategory=" +
//parameterCategory );
parameterNumber = raf.ReadByte();
//System.out.println( "PDS parameterNumber=" + parameterNumber );
typeGenProcess = raf.ReadByte();
//System.out.println( "PDS typeGenProcess=" + typeGenProcess );
backGenProcess = raf.ReadByte();
//System.out.println( "PDS backGenProcess=" + backGenProcess );
hoursAfter = GribNumbers.int2(raf);
//System.out.println( "PDS hoursAfter=" + hoursAfter );
minutesAfter = raf.ReadByte();
//System.out.println( "PDS minutesAfter=" + minutesAfter );
timeRangeUnit = raf.ReadByte();
//System.out.println( "PDS timeRangeUnit=" + timeRangeUnit );
forecastTime = GribNumbers.int4(raf);
//System.out.println( "PDS forecastTime=" + forecastTime );
break;
} // case 20
// Satellite Product
case 30: {
parameterCategory = raf.ReadByte();
//System.out.println( "PDS parameterCategory=" + parameterCategory );
parameterNumber = raf.ReadByte();
//System.out.println( "PDS parameterNumber=" + parameterNumber );
typeGenProcess = raf.ReadByte();
//System.out.println( "PDS typeGenProcess=" + typeGenProcess );
backGenProcess = raf.ReadByte();
//System.out.println( "PDS backGenProcess=" + backGenProcess );
nb = raf.ReadByte();
//System.out.println( "PDS nb =" + nb );
for (int j = 0; j < nb; j++)
{
SupportClass.Skip(raf, 10);
}
break;
} // case 30
// CCITTIA5 character string
case 254: {
parameterCategory = raf.ReadByte();
//System.out.println( "PDS parameterCategory=" +
//parameterCategory );
parameterNumber = raf.ReadByte();
//System.out.println( "PDS parameterNumber=" + parameterNumber );
//numberOfChars = GribNumbers.int4( raf );
//System.out.println( "PDS numberOfChars=" +
//numberOfChars );
break;
} // case 254
default:
break;
} // end switch
}
/// <summary> Constructs a Grib1BinaryDataSection object from a raf.
/// A bit map is defined.
///
/// </summary>
/// <param name="raf">raf with BDS content
/// </param>
/// <param name="decimalscale">the exponent of the decimal scale
/// </param>
/// <param name="bms">bit map section of GRIB record
///
/// </param>
/// <throws> NotSupportedException if stream contains no valid GRIB file </throws>
//UPGRADE_TODO: Class 'java.io.RandomAccessFile' was converted to 'System.IO.FileStream' which has a different behavior. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1073_javaioRandomAccessFile'"
public Grib1BinaryDataSection(System.IO.FileStream raf, int decimalscale, Grib1BitMapSection bms)
{
// octets 1-3 (section length)
length = (int)GribNumbers.uint3(raf);
//System.out.println( "BDS length = " + length );
// octet 4, 1st half (packing flag)
int unusedbits = raf.ReadByte();
// TODO Check this!!!
if ((unusedbits & 192) != 0)
{
throw new NotSupportedException("BDS: (octet 4, 1st half) not grid point data and simple packing ");
}
// octet 4, 2nd half (number of unused bits at end of this section)
unusedbits = unusedbits & 15;
//System.out.println( "BDS unusedbits = " + unusedbits );
// octets 5-6 (binary scale factor)
int binscale = GribNumbers.int2(raf);
// octets 7-10 (reference point = minimum value)
float refvalue = GribNumbers.float4(raf);
// octet 11 (number of bits per value)
int numbits = raf.ReadByte();
//System.out.println( "BDS numbits = " + numbits );
if (numbits == 0)
{
isConstant = true;
}
//System.out.println( "BDS isConstant = " + isConstant );
// *** read values *******************************************************
//UPGRADE_WARNING: Data types in Visual C# might be different. Verify the accuracy of narrowing conversions. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1042'"
float ref_Renamed = (float)(System.Math.Pow(10.0, -decimalscale) * refvalue);
//UPGRADE_WARNING: Data types in Visual C# might be different. Verify the accuracy of narrowing conversions. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1042'"
float scale = (float)(System.Math.Pow(10.0, -decimalscale) * System.Math.Pow(2.0, binscale));
if (bms != null)
{
bool[] bitmap = bms.Bitmap;
values = new float[bitmap.Length];
for (int i = 0; i < bitmap.Length; i++)
{
if (bitmap[i])
{
if (!isConstant)
{
values[i] = ref_Renamed + scale * bits2UInt(numbits, raf);
}
else
{
// rdg - added this to handle a constant valued parameter
values[i] = ref_Renamed;
}
}
else
{
values[i] = Grib1BinaryDataSection.UNDEFINED;
}
}
}
else
{
// bms is null
if (!isConstant)
{
//System.out.println( "BDS values.size = " +
//(((length - 11) * 8 - unusedbits) / numbits));
values = new float[((length - 11) * 8 - unusedbits) / numbits];
for (int i = 0; i < values.Length; i++)
{
values[i] = ref_Renamed + scale * bits2UInt(numbits, raf);
}
}
else
{
// constant valued - same min and max
int x = 0, y = 0;
raf.Seek(raf.Position - 53, System.IO.SeekOrigin.Begin); // return to start of GDS
length = (int)GribNumbers.uint3(raf);
if (length == 42)
{
// Lambert/Mercator offset
SupportClass.Skip(raf, 3);
x = GribNumbers.int2(raf);
y = GribNumbers.int2(raf);
}
else
{
SupportClass.Skip(raf, 7);
length = (int)GribNumbers.uint3(raf);
if (length == 32)
{
// Polar sterographic
SupportClass.Skip(raf, 3);
x = GribNumbers.int2(raf);
y = GribNumbers.int2(raf);
}
else
{
x = y = 1;
System.Console.Out.WriteLine("BDS constant value, can't determine array size");
}
}
values = new float[x * y];
for (int i = 0; i < values.Length; i++)
{
values[i] = ref_Renamed;
}
}
}
} // end Grib1BinaryDataSection
/// <summary> Constructs a <tt>Grib1GridDefinitionSection</tt> object from a raf.
///
/// </summary>
/// <param name="raf">RandomAccessFile with GDS content
///
/// </param>
/// <throws> NoValidGribException if raf contains no valid GRIB info </throws>
//UPGRADE_TODO: Class 'java.io.RandomAccessFile' was converted to 'System.IO.FileStream' which has a different behavior. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1073_javaioRandomAccessFile'"
public Grib1GridDefinitionSection(System.IO.FileStream raf)
{
int reserved; // used to read empty space
// octets 1-3 (Length of GDS)
length = (int)GribNumbers.uint3(raf);
if (length == 0)
{
// there's a extra byte between PDS and GDS
SupportClass.Skip(raf, -2);
length = (int)GribNumbers.uint3(raf);
}
//System.out.println( "GDS length = " + length );
// TODO Fix Checksum stuff
// get byte array for this gds, then reset raf to same position
// calculate checksum for this gds via the byte array
/*
* long mark = raf.Position;
* sbyte[] dst = new sbyte[length - 3];
* SupportClass.ReadInput(raf, dst, 0, dst.Length);
* raf.Seek(mark, System.IO.SeekOrigin.Begin);
* //UPGRADE_ISSUE: Class 'java.util.zip.CRC32' was not converted. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1000_javautilzipCRC32'"
* //UPGRADE_ISSUE: Constructor 'java.util.zip.CRC32.CRC32' was not converted. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1000_javautilzipCRC32'"
* CRC32 cs = new CRC32();
* //UPGRADE_ISSUE: Method 'java.util.zip.CRC32.update' was not converted. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1000_javautilzipCRC32'"
* cs.update(dst);
* //UPGRADE_ISSUE: Method 'java.util.zip.CRC32.getValue' was not converted. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1000_javautilzipCRC32'"
* checksum = System.Convert.ToString(cs.getValue());
* //System.out.println( "GDS checksum =" + checksum );
*/
// octets 4 NV
int NV = raf.ReadByte();
//System.out.println( "GDS NV = " + NV );
// octet 5 PL the location (octet number) of the list of numbers of points in each row
P_VorL = raf.ReadByte();
//System.out.println( "GDS PL = " + P_VorL );
// octet 6 (grid type)
type = raf.ReadByte();
//System.out.println( "GDS grid type = " + type );
name = getName(type);
if (type != 50)
{
// values same up to resolution
// octets 7-8 (Nx - number of points along x-axis)
nx = GribNumbers.int2(raf);
nx = (nx == -1)?1:nx;
// octets 9-10 (Ny - number of points along y-axis)
ny = GribNumbers.int2(raf);
ny = (ny == -1)?1:ny;
// octets 11-13 (La1 - latitude of first grid point)
lat1 = GribNumbers.int3(raf) / 1000.0;
// octets 14-16 (Lo1 - longitude of first grid point)
lon1 = GribNumbers.int3(raf) / 1000.0;
// octet 17 (resolution and component flags). See Table 7
resolution = raf.ReadByte();
}
switch (type)
{
// Latitude/Longitude grids , Arakawa semi-staggered e-grid rotated
// Arakawa filled e-grid rotated
case 0:
case 4:
case 40:
case 201:
case 202:
// octets 18-20 (La2 - latitude of last grid point)
lat2 = GribNumbers.int3(raf) / 1000.0;
// octets 21-23 (Lo2 - longitude of last grid point)
lon2 = GribNumbers.int3(raf) / 1000.0;
// octets 24-25 (Dx - Longitudinal Direction Increment )
dx = GribNumbers.int2(raf) / 1000.0;
// octets 26-27 (Dy - Latitudinal Direction Increment )
// Np - parallels between a pole and the equator
if (type == 4)
{
np = GribNumbers.int2(raf);
}
else
{
dy = GribNumbers.int2(raf) / 1000.0;
}
// octet 28 (Scanning mode) See Table 8
scan = raf.ReadByte();
// octet 29-32 reserved
reserved = GribNumbers.int4(raf);
if (length > 32)
{
// getP_VorL(raf);
// Vertical coordinates (NV) and thinned grids (PL) not supported - skip this
SupportClass.Skip(raf, length - 32);
}
break; // end Latitude/Longitude grids
case 1: // Mercator grids
// octets 18-20 (La2 - latitude of last grid point)
lat2 = GribNumbers.int3(raf) / 1000.0;
// octets 21-23 (Lo2 - longitude of last grid point)
lon2 = GribNumbers.int3(raf) / 1000.0;
// octets 24-26 (Latin - latitude where cylinder intersects the earth
latin1 = GribNumbers.int3(raf) / 1000.0;
// octet 27 reserved
reserved = raf.ReadByte();
// octet 28 (Scanning mode) See Table 8
scan = raf.ReadByte();
// octets 29-31 (Dx - Longitudinal Direction Increment )
dx = GribNumbers.int3(raf);
// octets 32-34 (Dx - Longitudinal Direction Increment )
dy = GribNumbers.int3(raf);
// octet 35-42 reserved
reserved = GribNumbers.int4(raf);
reserved = GribNumbers.int4(raf);
if (length > 42)
{
// getP_VorL(raf);
// Vertical coordinates (NV) and thinned grids (PL) not supported - skip this
SupportClass.Skip(raf, length - 42);
}
break; // end Mercator grids
case 3: // Lambert Conformal
// octets 18-20 (Lov - Orientation of the grid - east lon parallel to y axis)
lov = GribNumbers.int3(raf) / 1000.0;
// octets 21-23 (Dx - the X-direction grid length) See Note 2 of Table D
dx = GribNumbers.int3(raf);
// octets 24-26 (Dy - the Y-direction grid length) See Note 2 of Table D
dy = GribNumbers.int3(raf);
// octets 27 (Projection Center flag) See Note 5 of Table D
proj_center = raf.ReadByte();
// octet 28 (Scanning mode) See Table 8
scan = raf.ReadByte();
// octets 29-31 (Latin1 - first lat where secant cone cuts spherical earth
latin1 = GribNumbers.int3(raf) / 1000.0;
// octets 32-34 (Latin2 - second lat where secant cone cuts spherical earth)
latin2 = GribNumbers.int3(raf) / 1000.0;
// octets 35-37 (lat of southern pole)
latsp = GribNumbers.int3(raf) / 1000.0;
// octets 38-40 (lon of southern pole)
lonsp = GribNumbers.int3(raf) / 1000.0;
// octets 41-42
reserved = GribNumbers.int2(raf);
if (length > 42)
{
// getP_VorL(raf);
// Vertical coordinates (NV) and thinned grids (PL) not supported - skip this
SupportClass.Skip(raf, length - 42);
}
break; // end Lambert Conformal
case 5: // Polar Stereographic grids
// octets 18-20 (Lov - Orientation of the grid - east lon parallel to y axis)
lov = GribNumbers.int3(raf) / 1000.0;
// octets 21-23 (Dx - Longitudinal Direction Increment )
dx = GribNumbers.int3(raf);
// octets 24-26(Dy - Latitudinal Direction Increment )
dy = GribNumbers.int3(raf);
// octets 27 (Projection Center flag) See Note 5 of Table D
proj_center = raf.ReadByte();
// octet 28 (Scanning mode) See Table 8
scan = raf.ReadByte();
// octet 29-32 reserved
reserved = GribNumbers.int4(raf);
if (length > 32)
{
// getP_VorL(raf);
// Vertical coordinates (NV) and thinned grids (PL) not supported - skip this
SupportClass.Skip(raf, length - 32);
}
break; // end Polar Stereographic grids
//rotated grid
case 10:
//18-20
this.lat2 = GribNumbers.int3(raf) / 1000.0;
//21-23
this.lon2 = GribNumbers.int3(raf) / 1000.0;
//24-25
var tmpDx = GribNumbers.int2(raf);
this.dx = tmpDx == -1 ? -9999.0 : tmpDx / 1000.0;
//26-27
var tmpDy = GribNumbers.int2(raf);
this.dy = tmpDy == -1 ? -9999.0 : tmpDy / 1000.0;
//28
scan = raf.ReadByte();
//29-32
GribNumbers.int4(raf);
//33-35
this.latsp = GribNumbers.int3(raf) / 1000.0;
//36-38
this.lonsp = GribNumbers.int3(raf) / 1000.0;
//39-42 - angle
GribNumbers.float4(raf);
if (length > 42)
{
SupportClass.Skip(raf, length - 42);
}
break;
default:
System.Console.Out.WriteLine("Unknown Grid Type : " + type);
break;
} // end switch grid_type
//System.out.println( "scan=" + scan );
if ((scan & 63) != 0)
{
throw new NoValidGribException("GDS: This scanning mode (" + scan + ") is not supported.");
}
} // end Grib1GridDefinitionSection( raf )