/// <summary>
/// Parses the grid table data
/// </summary>
/// <param name="table">The table to fill</param>
/// <returns>true if the data could be read.</returns>
internal override bool ReadData(GridTable table)
{
using (var s = OpenGridTableStream())
{
s.Seek(_dataOffset + 176, SeekOrigin.Current);
using (var br = new BinaryReader(s))
{
var numPhis = table.NumPhis;
var coeffs = new PhiLambda[numPhis][];
var numLambdas = table.NumLambdas;
for (var row = 0; row < numPhis; row++)
{
coeffs[row] = new PhiLambda[numLambdas];
// NTV order is flipped compared with a normal CVS table
for (var col = numLambdas - 1; col >= 0; col--)
{
// shift values are given in "arc-seconds" and need to be converted to radians.
coeffs[row][col] =
PhiLambda.ArcSecondsToRadians(
ReadBigEndianDouble(br), ReadBigEndianDouble(br));
}
}
}
}
return(true);
}
/// <summary>
/// Parses the grid table data
/// </summary>
/// <param name="table">The table to fill</param>
/// <returns>true if the data could be read.</returns>
internal override bool ReadData(GridTable table)
{
using (var brLos = new BinaryReader(OpenGridTableStream()))
using (var brLas = new BinaryReader(OpenLasStream()))
{
var numPhis = table.NumPhis;
var coeffs = new PhiLambda[numPhis][];
var numLambdas = table.NumLambdas;
//position the stream
var offset = sizeof(float) * (numLambdas + 1);
brLas.BaseStream.Seek(offset, SeekOrigin.Current);
brLos.BaseStream.Seek(offset, SeekOrigin.Current);
for (var i = 0; i < numPhis; i++)
{
//Skip first 'zero' value
brLas.ReadBytes(sizeof(float));
brLos.ReadBytes(sizeof(float));
coeffs[i] = new PhiLambda[numLambdas];
coeffs[i][0] = PhiLambda.ArcSecondsToRadians(brLas.ReadSingle(), brLos.ReadSingle());
for (var j = 1; j < numLambdas; j++)
{
coeffs[i][j] = coeffs[i][j - 1] +
PhiLambda.ArcSecondsToRadians(brLas.ReadSingle(), brLos.ReadSingle());
}
table.Coefficients = coeffs;
}
return(true);
}
}
