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Created by Gaëlle USSEGLIO@ussegliogMaintainer

ossimGeoidEgm96 in SARDEMProjection

A ossimGeoidEgm96 is used instead of DEMHandler in SARDEMProjection.

This purpose was to improve performance, only. When a emg96 is provided, results between ossimGeoidEgm96 and DEMHandler are equal (cf : otbSARGeoidProjectionTest)

On HAL (a whole g2019 node), we have :

  • S4Reunion (diapOTB.py) : 15min for ossimGeoidEgm96 vs 16min30s for DEMHandler
  • IW_IRAN (burst 3-4 with SARMultiSlc_S1IW.py) : 9min30s for ossimGeoidEgm96 vs 16m51.229s

S1IW calls SARDEMProjection for each burst => a higher impact on performance.

Results are equivalent.

Edited by Gaëlle USSEGLIO
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