Changes between Version 16 and Version 17 of PetascopeTimeHandling


Ignore:
Timestamp:
Feb 28, 2014, 5:40:46 PM (11 years ago)
Author:
Piero Campalani
Comment:

fix coeff formula

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  • PetascopeTimeHandling

    v16 v17  
    9292To import irregular time series you can either manually insert in `petascopedb` the so-called vector weighting '''coefficients''' of the offset vector along time (see the ''Petascope'' [PetascopeDevGuide dev-guide]) or otherwise use our ''rasgeo'' component to handle the irregular time series directly with absolute time coordinates via the `'--z-coords'` parameter of `rasimport` (see [RasgeoUserGuide user guide] for more details).
    9393
    94 To better understand the meaining of (GML) weighting vector [http://schemas.opengis.net/gml/3.3/referenceableGrid.xsd coefficients], the general principle to decode numeric time coordinates is that the time coordinate `T'` is the representation of `[(c_i*v_t) * T']` time steps (T-CRS UoM) from the epoch of the T-CRS, being `v_t` the scalar norm of the offset vector of the coverage along time and `c_i` the coefficient associated to the `i`-th level in time.
     94To better understand the meaining of (GML) weighting vector [http://schemas.opengis.net/gml/3.3/referenceableGrid.xsd coefficients], the general principle to decode numeric time coordinates is that the time coordinate `T'` is the representation of `(c_T' * v_t)` time steps (T-CRS UoM) from the epoch of the T-CRS, being `v_t` the scalar norm of the offset vector of the coverage along time and `c_T'` the coefficient associated to T'.