MeteoIODoc 20240227.fb5b3765
mio::TimeShift Class Reference

Detailed Description

Time corrections.

This filter add offsets to the time at specified timestamps. This is for example usefull to remove the Daylight Saving Time in order to bring the timestamps back to Winter time only (or "Standard Time", as it should always be!) or to correct a clock that has drifted in a data logger.

This takes either a fixed offset or a correction file that contains on each line an ISO formatted timestamp as well as an offset (in seconds) to apply to the timestamps starting at the provided time (always assumed to be in the input timezone + a potential previous offset). So the supported arguments are:

  • CORRECTIONS: the correction file (optional);
  • OFFSET: the fixe offset (in seconds) to add to the time (optional).
TIME::filter1 = SHIFT
TIME::arg1::CORRECTIONS = ./input/meteo/dst.dat

The file dst.dat would look like this (the time is given in the timezone declared in Input::TIME_ZONE, first without offset and with -3600s offset for the second one):

2016-03-27T02:00 -3600
2016-10-30T03:00 0
Note
The current implementation does not handle data conflicts if a shifted timestep conflicts with another timestep. In such a case, an error message "[E] timestamp error for station..." will be returned and you will have to manually decide in your input data which timestep to keep.

#include <TimeFilters.h>

Public Member Functions

 TimeShift (const std::vector< std::pair< std::string, std::string > > &vecArgs, const std::string &name, const Config &cfg)
 
void process (const unsigned int &param, const std::vector< MeteoData > &ivec, std::vector< MeteoData > &ovec)
 
- Public Member Functions inherited from mio::ProcessingBlock
virtual ~ProcessingBlock ()
 
virtual void process (const unsigned int &param, const std::vector< MeteoData > &ivec, std::vector< MeteoData > &ovec)=0
 
virtual void process (Date &dateStart, Date &dateEnd)
 
std::string getName () const
 
const ProcessingPropertiesgetProperties () const
 
const std::string toString () const
 
bool skipStation (const std::string &station_id) const
 Should the provided station be skipped in the processing? More...
 
bool noStationsRestrictions () const
 
const std::vector< DateRangegetTimeRestrictions () const
 

Additional Inherited Members

- Static Public Member Functions inherited from mio::ProcessingBlock
static void readCorrections (const std::string &filter, const std::string &filename, std::vector< double > &X, std::vector< double > &Y)
 Read a data file structured as X Y value on each lines. More...
 
static void readCorrections (const std::string &filter, const std::string &filename, std::vector< double > &X, std::vector< double > &Y1, std::vector< double > &Y2)
 Read a data file structured as X Y1 Y2 value on each lines. More...
 
static std::vector< double > readCorrections (const std::string &filter, const std::string &filename, const size_t &col_idx, const char &c_type, const double &init)
 Read a correction file applicable to repeating time period. More...
 
static std::vector< offset_specreadCorrections (const std::string &filter, const std::string &filename, const double &TZ, const size_t &col_idx=2)
 Read a correction file, ie a file structured as timestamps followed by values on each lines. More...
 
static std::map< std::string, std::vector< DateRange > > readDates (const std::string &filter, const std::string &filename, const double &TZ)
 Read a list of date ranges by stationIDs from a file. More...
 
- Protected Member Functions inherited from mio::ProcessingBlock
 ProcessingBlock (const std::vector< std::pair< std::string, std::string > > &vecArgs, const std::string &name, const Config &cfg)
 protected constructor only to be called by children More...
 
- Static Protected Member Functions inherited from mio::ProcessingBlock
static void extract_dbl_vector (const unsigned int &param, const std::vector< MeteoData > &ivec, std::vector< double > &ovec)
 
static void extract_dbl_vector (const unsigned int &param, const std::vector< const MeteoData * > &ivec, std::vector< double > &ovec)
 
- Protected Attributes inherited from mio::ProcessingBlock
const std::set< std::string > excluded_stations
 
const std::set< std::string > kept_stations
 
const std::vector< DateRangetime_restrictions
 
ProcessingProperties properties
 
const std::string block_name
 
- Static Protected Attributes inherited from mio::ProcessingBlock
static const double soil_albedo = .23
 
static const double snow_albedo = .85
 
static const double snow_thresh = .1
 parametrize the albedo from HS More...
 

Constructor & Destructor Documentation

◆ TimeShift()

mio::TimeShift::TimeShift ( const std::vector< std::pair< std::string, std::string > > &  vecArgs,
const std::string &  name,
const Config cfg 
)

Member Function Documentation

◆ process()

void mio::TimeShift::process ( const unsigned int &  param,
const std::vector< MeteoData > &  ivec,
std::vector< MeteoData > &  ovec 
)
virtual

Implements mio::ProcessingBlock.


The documentation for this class was generated from the following files: