GRASS 8 Programmer's Manual 8.6.0dev(2026)-1d1e47ad9d
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Data Fields
Cell_head Struct Reference

2D/3D raster map header (used also for region) More...

#include <gis.h>

Data Fields

int format
 Max number of bytes per raster data value minus 1 (raster header only)
 
int compressed
 Compression mode (raster header only)
 
int rows
 Number of rows for 2D data.
 
int rows3
 Number of rows for 3D data.
 
int cols
 Number of columns for 2D data.
 
int cols3
 Number of columns for 3D data.
 
int depths
 number of depths for 3D data
 
int proj
 Projection code.
 
int zone
 Projection zone (UTM)
 
double ew_res
 Resolution - east to west cell size for 2D data.
 
double ew_res3
 Resolution - east to west cell size for 3D data.
 
double ns_res
 Resolution - north to south cell size for 2D data.
 
double ns_res3
 Resolution - north to south cell size for 3D data.
 
double tb_res
 Resolution - top to bottom cell size for 3D data.
 
double north
 Extent coordinates (north)
 
double south
 Extent coordinates (south)
 
double east
 Extent coordinates (east)
 
double west
 Extent coordinates (west)
 
double top
 Extent coordinates (top) - 3D data.
 
double bottom
 Extent coordinates (bottom) - 3D data.
 

Detailed Description

2D/3D raster map header (used also for region)

Definition at line 446 of file gis.h.

Field Documentation

◆ bottom

double Cell_head::bottom

Extent coordinates (bottom) - 3D data.

Definition at line 502 of file gis.h.

Referenced by G__read_Cell_head_array(), G__write_Cell_head3(), G_adjust_Cell_head3(), GS_get_aspect(), GS_set_viewport(), Rast3d_is_valid_location(), and Vect_write_ascii().

◆ cols

int Cell_head::cols

Number of columns for 2D data.

Definition at line 465 of file gis.h.

Referenced by D_set_region(), G__calloc(), G__malloc(), G__read_Cell_head_array(), G__realloc(), G__write_Cell_head(), G_adjust_Cell_head(), G_adjust_Cell_head3(), G_adjust_window_to_box(), G_get_3dview_defaults(), GS_get_dims(), Gs_loadmap_as_bitmap(), Gs_loadmap_as_char(), Gs_loadmap_as_float(), Gs_loadmap_as_int(), Gs_loadmap_as_short(), IL_output_2d(), N_init_geom_data_2d(), N_read_rast3d_to_array_3d(), N_read_rast_to_array_2d(), N_write_array_2d_to_rast(), N_write_array_3d_to_rast3d(), Rast__open_old(), Rast_get_vrt(), and Rast_get_vrt_row().

◆ cols3

int Cell_head::cols3

Number of columns for 3D data.

Definition at line 467 of file gis.h.

Referenced by G__read_Cell_head_array(), G__write_Cell_head3(), and G_adjust_Cell_head3().

◆ compressed

int Cell_head::compressed

Compression mode (raster header only)

  • 0: uncompressed
  • 1: compressed
  • -1: pre GRASS 3.0

Definition at line 459 of file gis.h.

Referenced by G__read_Cell_head_array(), G__write_Cell_head(), G_get_3dview_defaults(), and Rast__open_old().

◆ depths

int Cell_head::depths

number of depths for 3D data

Definition at line 469 of file gis.h.

Referenced by G__read_Cell_head_array(), G__write_Cell_head3(), G_adjust_Cell_head3(), N_read_rast3d_to_array_3d(), and N_write_array_3d_to_rast3d().

◆ east

double Cell_head::east

Extent coordinates (east)

Definition at line 496 of file gis.h.

Referenced by D_set_region(), G__read_Cell_head_array(), G__write_Cell_head(), G_adjust_Cell_head(), G_adjust_Cell_head3(), G_adjust_easting(), G_adjust_window_ll(), G_adjust_window_to_box(), G_get_3dview_defaults(), G_point_in_window(), G_window_overlap(), G_window_percentage_overlap(), get_pj_area(), Gp_load_sites(), Gv_load_vect(), Rast3d_coord2location(), Rast3d_is_valid_location(), Rast3d_location2coord(), Rast3d_location2coord2(), Rast3d_location2coord_double(), Rast_align_window(), Rast_get_vrt(), and Vect_write_ascii().

◆ ew_res

double Cell_head::ew_res

Resolution - east to west cell size for 2D data.

Definition at line 482 of file gis.h.

Referenced by G__read_Cell_head_array(), G__write_Cell_head(), G_adjust_Cell_head(), G_adjust_Cell_head3(), G_adjust_window_ll(), G_adjust_window_to_box(), G_get_3dview_defaults(), Gs_load_3dview(), N_init_geom_data_2d(), Rast_align_window(), Rast_col_to_easting(), Rast_easting_to_col(), and Rast_get_vrt().

◆ ew_res3

double Cell_head::ew_res3

Resolution - east to west cell size for 3D data.

Definition at line 484 of file gis.h.

Referenced by G__read_Cell_head_array(), G__write_Cell_head3(), and G_adjust_Cell_head3().

◆ format

int Cell_head::format

Max number of bytes per raster data value minus 1 (raster header only)

Note: -1 for FP raster maps

Definition at line 452 of file gis.h.

Referenced by G__read_Cell_head_array(), G__write_Cell_head(), G_get_3dview_defaults(), and Rast__open_old().

◆ north

double Cell_head::north

Extent coordinates (north)

Definition at line 492 of file gis.h.

Referenced by D_set_region(), G__read_Cell_head_array(), G__write_Cell_head(), G_adjust_Cell_head(), G_adjust_Cell_head3(), G_adjust_window_ll(), G_adjust_window_to_box(), G_get_3dview_defaults(), G_point_in_window(), G_window_overlap(), G_window_percentage_overlap(), get_pj_area(), Gp_load_sites(), Gv_load_vect(), Rast3d_coord2location(), Rast3d_is_valid_location(), Rast3d_location2coord(), Rast3d_location2coord2(), Rast3d_location2coord_double(), Rast_align_window(), Rast_get_vrt(), Rast_get_vrt_row(), Rast_northing_to_row(), Rast_row_to_northing(), and Vect_write_ascii().

◆ ns_res

double Cell_head::ns_res

Resolution - north to south cell size for 2D data.

Definition at line 486 of file gis.h.

Referenced by G__read_Cell_head_array(), G__write_Cell_head(), G_adjust_Cell_head(), G_adjust_Cell_head3(), G_adjust_window_ll(), G_adjust_window_to_box(), G_get_3dview_defaults(), Gs_load_3dview(), N_init_geom_data_2d(), Rast_align_window(), Rast_get_vrt_row(), Rast_northing_to_row(), and Rast_row_to_northing().

◆ ns_res3

double Cell_head::ns_res3

Resolution - north to south cell size for 3D data.

Definition at line 488 of file gis.h.

Referenced by G__read_Cell_head_array(), G__write_Cell_head3(), and G_adjust_Cell_head3().

◆ proj

int Cell_head::proj

Projection code.

  • PROJECTION_XY
  • PROJECTION_UTM
  • PROJECTION_SP
  • PROJECTION_LL
  • PROJECTION_OTHER

Definition at line 478 of file gis.h.

Referenced by D_set_region(), G__read_Cell_head_array(), G__write_Cell_head(), G__write_Cell_head3(), G_adjust_Cell_head(), G_adjust_Cell_head3(), G_adjust_easting(), G_adjust_window_ll(), G_get_3dview_defaults(), G_projection(), G_window_overlap(), G_window_percentage_overlap(), get_pj_area(), GPJ_osr_to_grass(), Rast__check_for_auto_masking(), Rast__open_old(), Rast_align_window(), and Rast_get_vrt().

◆ rows

int Cell_head::rows

Number of rows for 2D data.

Definition at line 461 of file gis.h.

Referenced by D_set_region(), G__calloc(), G__malloc(), G__read_Cell_head_array(), G__realloc(), G__write_Cell_head(), G_adjust_Cell_head(), G_adjust_Cell_head3(), G_adjust_window_to_box(), G_get_3dview_defaults(), GS_get_dims(), Gs_loadmap_as_bitmap(), Gs_loadmap_as_char(), Gs_loadmap_as_float(), Gs_loadmap_as_int(), Gs_loadmap_as_short(), IL_output_2d(), N_init_geom_data_2d(), N_read_rast3d_to_array_3d(), N_read_rast_to_array_2d(), N_write_array_2d_to_rast(), N_write_array_3d_to_rast3d(), and Rast_get_vrt_row().

◆ rows3

int Cell_head::rows3

Number of rows for 3D data.

Definition at line 463 of file gis.h.

Referenced by G__read_Cell_head_array(), G__write_Cell_head3(), and G_adjust_Cell_head3().

◆ south

double Cell_head::south

Extent coordinates (south)

Definition at line 494 of file gis.h.

Referenced by D_set_region(), G__read_Cell_head_array(), G__write_Cell_head(), G_adjust_Cell_head(), G_adjust_Cell_head3(), G_adjust_window_ll(), G_adjust_window_to_box(), G_get_3dview_defaults(), G_point_in_window(), G_window_overlap(), G_window_percentage_overlap(), get_pj_area(), Gp_load_sites(), Gs_load_3dview(), Gv_load_vect(), Rast_align_window(), Rast_get_vrt(), and Vect_write_ascii().

◆ tb_res

double Cell_head::tb_res

Resolution - top to bottom cell size for 3D data.

Definition at line 490 of file gis.h.

Referenced by G__read_Cell_head_array(), G__write_Cell_head3(), and G_adjust_Cell_head3().

◆ top

double Cell_head::top

Extent coordinates (top) - 3D data.

Definition at line 500 of file gis.h.

Referenced by G__read_Cell_head_array(), G__write_Cell_head3(), G_adjust_Cell_head3(), Gp_load_sites(), GS_get_aspect(), GS_set_viewport(), Gv_load_vect(), Rast3d_coord2location(), Rast3d_is_valid_location(), Rast3d_location2coord(), Rast3d_location2coord2(), Rast3d_location2coord_double(), and Vect_write_ascii().

◆ west

double Cell_head::west

Extent coordinates (west)

Definition at line 498 of file gis.h.

Referenced by D_set_region(), G__read_Cell_head_array(), G__write_Cell_head(), G_adjust_Cell_head(), G_adjust_Cell_head3(), G_adjust_window_ll(), G_adjust_window_to_box(), G_get_3dview_defaults(), G_point_in_window(), G_window_overlap(), G_window_percentage_overlap(), get_pj_area(), Gp_load_sites(), Gs_load_3dview(), Gv_load_vect(), Rast_align_window(), Rast_col_to_easting(), Rast_easting_to_col(), Rast_get_vrt(), and Vect_write_ascii().

◆ zone

int Cell_head::zone

Projection zone (UTM)

Definition at line 480 of file gis.h.

Referenced by G__read_Cell_head_array(), G__write_Cell_head(), G_get_3dview_defaults(), G_zone(), GPJ_osr_to_grass(), Rast__check_for_auto_masking(), Rast__open_old(), and Rast_align_window().

The documentation for this struct was generated from the following file: