EPRJ_LAMBERT_CONFORMAL_CONIC:
EPRJ_TRANSVERSE_MERCATOR:
  1.6-esri has special handling for HARN / Wisconsin!

EPRJ_HOTINE_OBLIQUE_MERCATOR:
  What should we do if proParams[12] *not* > 0.0?

EPRJ_KROVAK:
  still issues around axis orientation - esri uses special parameters to
  represent this.  hfadataset.cpp is ignoring these parameters from .img.

"Anchored LSR" (53)
  - was EPRJ_LOCAL in 1.6-esri.