The Helmert operator can take up to 16 parameters in the dynamic case. This makes expressions involving Helmert steps quite hard to read. And as the parameters typically come in families of 3, we might as well introduce an optional set of parameter names, each taking a group of 3 numbers.
The Helmert operator can take up to 16 parameters in the dynamic case. This makes expressions involving Helmert steps quite hard to read. And as the parameters typically come in families of 3, we might as well introduce an optional set of parameter names, each taking a group of 3 numbers.
For instance, we may replace the group
by the more easily eaten
perhaps adding homologous names like
velocity
andangular_velocity
for thedx, dy, dz
anddrx, dry, drz
pairs.Or what about
translation_trend
androtation_trend
?For PROJ compatibility, the existing parameters should be kept as alternatives.
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