ignitionFitsByELF.RdWith sim$fireSense_IgnitionFittedList and sim$fireSense_EscapeFittedList (named by ELFind), each
coarse pixel is assigned to its ELF from sim$rasterToMatchLargeELF (the value at the pixel's centre)
and gets that ELF's models. Otherwise all pixels get sim$fireSense_IgnitionFitted and
sim$fireSense_EscapeFitted.
ignitionFitsByELF(sim, pixelID)list, one element per fit, each with ign, esc and rows (indices into pixelID).