quant_rw.c File Reference

#include <grass/gis.h>
#include <grass/glocale.h>
#include <string.h>

Include dependency graph for quant_rw.c:

Go to the source code of this file.

Functions
int	G_truncate_fp_map (const char *name, const char *mapset)
int	G_round_fp_map (const char *name, const char *mapset)
int	G_quantize_fp_map (const char *name, const char *mapset, CELL min, CELL max)
	Writes the f_quant file for the raster map name with one rule. The rule is generated using the floating-point range in f_range producing the integer range [cmin,cmax]. More...
int	G_quantize_fp_map_range (const char *name, const char *mapset, DCELL d_min, DCELL d_max, CELL min, CELL max)
	Writes the f_quant file for the raster map name with one rule. The rule is generated using the floating-point range [dmin,dmax] and the integer range [min,max]. This routine differs from the one above in that the application controls the floating-point range. For example, r.slope.aspect will use this routine to quantize the slope map from [0.0, 90.0] to [0, 90] even if the range of slopes is not 0-90. The aspect map would be quantized from [0.0, 360.0] to [0, 360]. More...
int	G_write_quant (const char *name, const char *mapset, const struct Quant *quant)
	Writes the f_quant file for the raster map name from q. if mapset==G_mapset() i.e. the map is in current mapset, then the original quant file in cell_misc/map/f_quant is written. Otherwise q is written into quant2/mapset/name (much like colr2 element). This results in map being read using quant rules stored in q from G_mapset(). See G_read_quant() for detailes. More...
int	G_read_quant (const char *name, const char *mapset, struct Quant *quant)
	reads quantization rules for "name" in "mapset" and stores them in the quantization structure "quant". If the map is in another mapset, first checks for quant2 table for this map in current mapset. Return codes: -2 if raster map is of type integer -1 if (! G__name_is_fully_qualified ()) 0 if quantization file does not exist, or the file is empty or has wrong format. 1 if non-empty quantization file exists. More...

Function Documentation

int G_quantize_fp_map	(	const char *	name,
		const char *	mapset,
		CELL	min,
		CELL	max
	)

Writes the f_quant file for the raster map name with one rule. The rule is generated using the floating-point range in f_range producing the integer range [cmin,cmax].

Parameters

name
cmin
cmax

Returns

int

Definition at line 113 of file quant_rw.c.

References buf, G_get_fp_range_min_max(), G_is_d_null_value(), G_quantize_fp_map_range(), G_read_fp_range(), G_warning(), and sprintf().

int G_quantize_fp_map_range	(	const char *	name,
		const char *	mapset,
		DCELL	d_min,
		DCELL	d_max,
		CELL	min,
		CELL	max
	)

Writes the f_quant file for the raster map name with one rule. The rule is generated using the floating-point range [dmin,dmax] and the integer range [min,max]. This routine differs from the one above in that the application controls the floating-point range. For example, r.slope.aspect will use this routine to quantize the slope map from [0.0, 90.0] to [0, 90] even if the range of slopes is not 0-90. The aspect map would be quantized from [0.0, 360.0] to [0, 360].

Parameters

name
dmin
dmax
cmin
cmax

Returns

int

Definition at line 159 of file quant_rw.c.

References buf, G_quant_add_rule(), G_quant_init(), G_warning(), G_write_quant(), and sprintf().

Referenced by G_quantize_fp_map(), IL_output_2d(), and IL_resample_output_2d().

int G_read_quant	(	const char *	name,
		const char *	mapset,
		struct Quant *	quant
	)

reads quantization rules for "name" in "mapset" and stores them in the quantization structure "quant". If the map is in another mapset, first checks for quant2 table for this map in current mapset. Return codes: -2 if raster map is of type integer -1 if (! G__name_is_fully_qualified ()) 0 if quantization file does not exist, or the file is empty or has wrong format. 1 if non-empty quantization file exists.

Parameters

name
mapset
q

Returns

int

Definition at line 245 of file quant_rw.c.

References G__quant_import(), and G_quant_init().

Referenced by G__open_cell_old(), and G_read_range().

int G_round_fp_map	(	const char *	name,
		const char *	mapset
	)

Definition at line 81 of file quant_rw.c.

References buf, G_quant_init(), G_quant_round(), G_warning(), G_write_quant(), and sprintf().

int G_truncate_fp_map	(	const char *	name,
		const char *	mapset
	)

Definition at line 64 of file quant_rw.c.

References buf, G_quant_init(), G_quant_truncate(), G_warning(), G_write_quant(), and sprintf().

int G_write_quant	(	const char *	name,
		const char *	mapset,
		const struct Quant *	quant
	)

Writes the f_quant file for the raster map name from q. if mapset==G_mapset() i.e. the map is in current mapset, then the original quant file in cell_misc/map/f_quant is written. Otherwise q is written into quant2/mapset/name (much like colr2 element). This results in map being read using quant rules stored in q from G_mapset(). See G_read_quant() for detailes.

Parameters

name
mapset
q

Returns

int

Definition at line 198 of file quant_rw.c.

References buf, G__quant_export(), G_quant_get_limits(), G_raster_map_type(), G_warning(), and sprintf().

Referenced by G_quantize_fp_map_range(), G_round_fp_map(), and G_truncate_fp_map().