FileArome::FileArome(std::string iFilename, bool iReadOnly) : FileNetcdf(iFilename, iReadOnly) {
// Set dimensions
NcDim* dTime = getDim("time");
NcDim* dLon = getDim("x");
NcDim* dLat = getDim("y");
mNTime = dTime->size();
mNLat = dLat->size();
mNLon = dLon->size();
mNEns = 1;
mLats = getLatLonVariable("latitude");
mLons = getLatLonVariable("longitude");
if(hasVariableCore("surface_geopotential")) {
FieldPtr elevField = getFieldCore("surface_geopotential", 0);
mElevs.resize(getNumLat());
for(int i = 0; i < getNumLat(); i++) {
mElevs[i].resize(getNumLon());
for(int j = 0; j < getNumLon(); j++) {
float value = (*elevField)(i,j,0) / 9.81;
mElevs[i][j] = value;
}
}
std::cout << "Deriving altitude from geopotential height in " << getFilename() << std::endl;
}
else {
mElevs = getLatLonVariable("altitude");
}
if(hasVar("time")) {
NcVar* vTime = getVar("time");
double* times = new double[mNTime];
vTime->get(times , mNTime);
setTimes(std::vector<double>(times, times+mNTime));
delete[] times;
}
else {
std::vector<double> times;
times.resize(getNumTime(), Util::MV);
setTimes(times);
}
if(hasVar("forecast_reference_time")) {
NcVar* vReferenceTime = getVar("forecast_reference_time");
double referenceTime = getReferenceTime();
vReferenceTime->get(&referenceTime, 1);
setReferenceTime(referenceTime);
}
Util::status( "File '" + iFilename + " 'has dimensions " + getDimenionString());
}
void FileNetcdf::writeReferenceTime() {
if(!hasVar("forecast_reference_time")) {
int id;
int status = ncredef(mFile);
handleNetcdfError(status, "could not put into define mode");
status = nc_def_var(mFile, "forecast_reference_time", NC_DOUBLE, 0, NULL, &id);
handleNetcdfError(status, "writing reference time");
status = ncendef(mFile);
handleNetcdfError(status, "could not put into data mode");
}
int vTime = getVar("forecast_reference_time");
double referenceTime = getReferenceTime();
if(!Util::isValid(referenceTime))
referenceTime = NC_FILL_DOUBLE;
int status = nc_put_var_double(mFile, vTime, &referenceTime);
handleNetcdfError(status, "could not write reference time");
setAttribute(vTime, "standard_name", "forecast_reference_time");
setAttribute(vTime, "units", "seconds since 1970-01-01 00:00:00 +00:00");
}
Time Time::getCurrentTime() {
return Time((pt::microsec_clock::universal_time() - getReferenceTime()).total_microseconds());
}
void Time::from_posix_time(pt::ptime time) {
if (time != pt::not_a_date_time)
t = (time - getReferenceTime()).total_microseconds();
}
pt::ptime Time::to_posix_time() const {
return getReferenceTime() + pt::microseconds(t);
}
