public async Task <RealValueNodes> GetAsync(ICellRequest cell)
{
var variableName = cell.VariableName;
var timeSegment = cell.Time;
var bounds = timeIntegrator.GetBoundingBox(timeSegment);
if (bounds.IsSingular)
{
double[] empty = new double[0];
return(new RealValueNodes(empty, empty, empty));
}
int[] origin = new int[2];
int[] shape = new int[2];
int timeDimNum = timeDimNumber[variableName];
int stationDimNum = stationsDimNumber[variableName];
int[] stationsIdxs = stationLocator.GetRelevantStationsIndices(cell);
int stationMinIdx = stationsIdxs.Min(), stationMaxIdx = stationsIdxs.Max();
int stationsCount = stationsIdxs.Length;
//data fetching
origin[timeDimNum] = bounds.first;
origin[stationDimNum] = stationMinIdx;
shape[timeDimNum] = bounds.last - bounds.first + 1;
shape[stationDimNum] = stationMaxIdx - stationMinIdx + 1;
traceSource.TraceEvent(TraceEventType.Verbose, 2, "Requesting raw data for cell");
var dataTask = dataStorage.GetDataAsync(variableName, origin, null, shape);
//integration points calculation
IPs timeIntegrationPoints = timeIntegrator.GetTempIPs(timeSegment);
IPs[][] ips = new IPs[stationsCount][];
for (int i = 0; i < stationsCount; i++)
{
var curr = new IPs[2];
ips[i] = curr;
int idx = stationsIdxs[i];
curr[stationDimNum] = new IPs()
{
Weights = new double[] { 1.0 }, Indices = new int[] { idx }, BoundingIndices = new IndexBoundingBox()
{
first = idx, last = idx
}
};
curr[timeDimNum] = timeIntegrationPoints;
}
var data = await dataTask;
object missingValue = missingValuesDict.GetMissingValue(variableName);
if (missingValue != null && missingValue.GetType() != varTypes[variableName])
{
traceSource.TraceEvent(TraceEventType.Warning, 1, string.Format("A missing value of the variable \"{0}\"has different type from variable type. Ignoring MV definition", variableName));
missingValue = null;
}
IEnumerable <Utils.IntegrationResult> obsResults;
if (missingValue != null)
{
obsResults = Utils.ArrayMean.IntegrateSequenceWithMVs2D(variableName, data, missingValue, origin, ips);
}
else
{
obsResults = Utils.ArrayMean.IntegrateSequence2D(variableName, data, origin, ips);
}
double scaleFacotor = dataRepresentationDictionary.ScaleFactors[variableName];
double addOffset = dataRepresentationDictionary.AddOffsets[variableName];
var scaledResults = obsResults.Select(r => (r.Integral / r.SumOfWeights) * scaleFacotor + addOffset).ToArray();
int len = scaledResults.Length;
List <double> valuesList = new List <double>(len);
List <double> latsList = new List <double>(len);
List <double> lonsList = new List <double>(len);
for (int i = 0; i < len; i++)
{
if (!double.IsNaN(scaledResults[i]))
{
valuesList.Add(scaledResults[i]);
latsList.Add(stationsLats[stationsIdxs[i]]);
lonsList.Add(stationsLons[stationsIdxs[i]]);
}
}
return(new RealValueNodes(latsList.ToArray(), lonsList.ToArray(), valuesList.ToArray()));
}
