MtkLatLonToLS.c

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/*===========================================================================
=                                                                           =
=                              MtkLatLonToLS                                =
=                                                                           =
=============================================================================

                         Jet Propulsion Laboratory
                                   MISR
                               MISR Toolkit

            Copyright 2005, California Institute of Technology.
                           ALL RIGHTS RESERVED.
                 U.S. Government Sponsorship acknowledged.

============================================================================*/

#include "MisrMapQuery.h"
#include "MisrCoordQuery.h"
#include "MisrError.h"

MTKt_status MtkLatLonToLS(
  MTKt_MapInfo mapinfo, 
  double lat_dd,        
  double lon_dd,        
  float *line,          
  float *sample          )
{
  MTKt_status status_code;      /* Return status of this function */
  MTKt_status status;           /* Return status */
  double som_x;                 /* SOM X */
  double som_y;                 /* SOM Y */

  if (line == NULL || sample == NULL)
    MTK_ERR_CODE_JUMP(MTK_NULLPTR);

  status = MtkLatLonToSomXY(mapinfo.path, lat_dd, lon_dd, &som_x, &som_y);
  MTK_ERR_COND_JUMP(status);

  status = MtkSomXYToLS(mapinfo, som_x, som_y, line, sample);
  MTK_ERR_COND_JUMP(status);

  return MTK_SUCCESS;

ERROR_HANDLE:
  if (status_code != MTK_NULLPTR) {
    *line = -1.0;
    *sample = -1.0;
  }
  return status_code;
}