RFC 59.1:GDAL/OGR实用程序作为库
作者：法扎·马哈茂德，甚至鲁奥
联系人：gmail.com上的fazamhd，spatialys.com上的even.rouault
状态：通过、实施
实现版本：2.1
总结
这个RFC定义了如何将GDAL/OGR C/C++实用程序暴露为C可调用函数。修改实用程序代码以调用新函数。这个RFC给出了一个通用的框架和原则，并用一些实用程序进行了演示，但旨在与其他实用程序一起扩展。
理论基础
需要在不涉及系统调用的情况下从代码调用GDAL实用程序，以便能够处理内存中的数据集并使用进度/取消回调函数。
变化
创建一个公共头文件gdal_utils.h，其中包含gdal实用程序的公共声明。可以找到当前标题（仍在进行中） here .
每个实用程序都有一个函数（xxxoptionsnew），用于从指定为字符串数组的参数创建选项结构。此函数还接受一个额外的半私有结构作为参数，用于与命令行实用程序本身的代码协作。
对于GDALInfo（）：
/*! Options for GDALInfo(). Opaque type */
typedef struct GDALInfoOptions GDALInfoOptions;
typedef struct GDALInfoOptionsForBinary GDALInfoOptionsForBinary;
/**
* Allocates a GDALInfoOptions struct.
*
* @param papszArgv NULL terminated list of options (potentially including filename and open options too)
* The accepted options are the one of the gdalinfo utility.
* @param psOptionsForBinary (output) may be NULL (and should generally be NULL),
* otherwise (gdalinfo_bin.cpp use case) must be allocated with
* GDALInfoOptionsForBinaryNew() prior to this function. Will be
* filled with potentially present filename, open options, subdataset number...
* @return pointer to the allocated GDALInfoOptions struct.
*
* @since GDAL 2.1
*/
GDALInfoOptions CPL_DLL *GDALInfoOptionsNew(char** papszArgv, GDALInfoOptionsForBinary* psOptionsForBinary);
void CPL_DLL GDALInfoOptionsFree( GDALInfoOptions *psOptions );
/**
* Lists various information about a GDAL supported raster dataset.
*
* GDALInfoOptions* must be allocated and freed with GDALInfoOptionsNew()
* and GDALInfoOptionsFree() respectively.
*
* @param hDataset the dataset handle.
* @param psOptions the options structure returned by GDALInfoOptionsNew() or NULL.
* @return string corresponding to the information about the raster dataset.
* It must be freed using CPLFree().
*
* @since GDAL 2.1
*/
char CPL_DLL *GDALInfo( GDALDatasetH hDataset, const GDALInfoOptions *psOptions );
对于gdaltransate（），也是如此：
/*! Options for GDALTranslate(). Opaque type */
typedef struct GDALTranslateOptions GDALTranslateOptions;
typedef struct GDALTranslateOptionsForBinary GDALTranslateOptionsForBinary;
GDALTranslateOptions CPL_DLL *GDALTranslateOptionsNew(char** papszArgv,
GDALTranslateOptionsForBinary* psOptionsForBinary);
void CPL_DLL GDALTranslateOptionsFree( GDALTranslateOptions *psOptions );
void CPL_DLL GDALTranslateOptionsSetProgress( GDALTranslateOptions *psOptions,
GDALProgressFunc pfnProgress,
void *pProgressData );
GDALDatasetH CPL_DLL GDALTranslate(const char *pszDestFilename,
GDALDatasetH hSrcDataset,
const GDALTranslateOptions *psOptions,
int *pbUsageError);
类似于GDALWarp（）：
/*! Options for GDALWarp(). Opaque type */
typedef struct GDALWarpAppOptions GDALWarpAppOptions;
typedef struct GDALWarpAppOptionsForBinary GDALWarpAppOptionsForBinary;
GDALWarpAppOptions CPL_DLL *GDALWarpAppOptionsNew(char** papszArgv,
GDALWarpAppOptionsForBinary* psOptionsForBinary);
void CPL_DLL GDALWarpAppOptionsFree( GDALWarpAppOptions *psOptions );
void CPL_DLL GDALWarpAppOptionsSetProgress( GDALWarpAppOptions *psOptions,
GDALProgressFunc pfnProgress,
void *pProgressData );
void CPL_DLL GDALWarpAppOptionsSetWarpOption( GDALWarpAppOptions *psOptions,
const char* pszKey,
const char* pszValue );
GDALDatasetH CPL_DLL GDALWarp( const char *pszDest, GDALDatasetH hDstDS, int nSrcCount,
GDALDatasetH *pahSrcDS,
const GDALWarpAppOptions *psOptions, int *pbUsageError );
对于GDALVectorTranslate（）（相当于ogr2ogr）：
/*! Options for GDALVectorTranslate(). Opaque type */
typedef struct GDALVectorTranslateOptions GDALVectorTranslateOptions;
typedef struct GDALVectorTranslateOptionsForBinary GDALVectorTranslateOptionsForBinary;
GDALVectorTranslateOptions CPL_DLL *GDALVectorTranslateOptionsNew(char** papszArgv,
GDALVectorTranslateOptionsForBinary* psOptionsForBinary);
void CPL_DLL GDALVectorTranslateOptionsFree( GDALVectorTranslateOptions *psOptions );
void CPL_DLL GDALVectorTranslateOptionsSetProgress( GDALVectorTranslateOptions *psOptions,
GDALProgressFunc pfnProgress,
void *pProgressData );
GDALDatasetH CPL_DLL GDALVectorTranslate( const char *pszDest, GDALDatasetH hDstDS, int nSrcCount,
GDALDatasetH *pahSrcDS,
const GDALVectorTranslateOptions *psOptions, int *pbUsageError );
有关其他实用程序，请参见 gdal_utils.h
SWIG绑定（Python/Java/C#/Perl）更改
所有绑定
对于所有绑定，以上函数都映射到SWIG，其中：
struct GDALInfoOptions {
%extend {
GDALInfoOptions(char** options) {
return GDALInfoOptionsNew(options, NULL);
}
~GDALInfoOptions() {
GDALInfoOptionsFree( self );
}
}
};
%rename (InfoInternal) GDALInfo;
char *GDALInfo( GDALDatasetShadow *hDataset, GDALInfoOptions *infoOptions );
struct GDALTranslateOptions {
%extend {
GDALTranslateOptions(char** options) {
return GDALTranslateOptionsNew(options, NULL);
}
~GDALTranslateOptions() {
GDALTranslateOptionsFree( self );
}
}
};
%rename (TranslateInternal) wrapper_GDALTranslate;
%newobject wrapper_GDALTranslate;
%inline %{
GDALDatasetShadow* wrapper_GDALTranslate( const char* dest,
GDALDatasetShadow* dataset,
GDALTranslateOptions* translateOptions,
GDALProgressFunc callback=NULL,
void* callback_data=NULL);
struct GDALWarpAppOptions {
%extend {
GDALWarpAppOptions(char** options) {
return GDALWarpAppOptionsNew(options, NULL);
}
~GDALWarpAppOptions() {
GDALWarpAppOptionsFree( self );
}
}
};
/* Note: we must use 2 distinct names since there's a bug/feature in swig */
/* that doesn't play nicely with the (int object_list_count, GDALDatasetShadow** poObjects) input typemap */
%inline %{
int wrapper_GDALWarpDestDS( GDALDatasetShadow* dstDS,
int object_list_count, GDALDatasetShadow** poObjects,
GDALWarpAppOptions* warpAppOptions,
GDALProgressFunc callback=NULL,
void* callback_data=NULL),
%}
%newobject wrapper_GDALWarpDestName;
%inline %{
GDALDatasetShadow* wrapper_GDALWarpDestName( const char* dest,
int object_list_count, GDALDatasetShadow** poObjects,
GDALWarpAppOptions* warpAppOptions,
GDALProgressFunc callback=NULL,
void* callback_data=NULL),
%}
struct GDALVectorTranslateOptions {
%extend {
GDALVectorTranslateOptions(char** options) {
return GDALVectorTranslateOptionsNew(options, NULL);
}
~GDALVectorTranslateOptions() {
GDALVectorTranslateOptionsFree( self );
}
}
};
/* Note: we must use 2 distinct names since there's a bug/feature in swig */
/* that doesn't play nicely with the (int object_list_count, GDALDatasetShadow** poObjects) input typemap */
%inline %{
int wrapper_GDALVectorTranslateDestDS( GDALDatasetShadow* dstDS,
GDALDatasetShadow* srcDS,
GDALVectorTranslateOptions* options,
GDALProgressFunc callback=NULL,
void* callback_data=NULL);
%}
%newobject wrapper_GDALVectorTranslateDestName;
%inline %{
GDALDatasetShadow* wrapper_GDALVectorTranslateDestName( const char* dest,
GDALDatasetShadow* srcDS,
GDALVectorTranslateOptions* options,
GDALProgressFunc callback=NULL,
void* callback_data=NULL);
%}
有关其他实用程序，请参见 gdal.i
Python包
对于Python绑定，创建方便包装器以允许以更用户友好的方式指定选项。
def InfoOptions(options = [], format = 'text', deserialize = True,
computeMinMax = False, reportHistograms = False, reportProj4 = False,
stats = False, approxStats = False, computeChecksum = False,
showGCPs = True, showMetadata = True, showRAT = True, showColorTable = True,
listMDD = False, showFileList = True, allMetadata = False,
extraMDDomains = None):
""" Create a InfoOptions() object that can be passed to gdal.Info()
options can be be an array of strings, a string or let empty and filled from other keywords."""
def Info(ds, **kwargs):
""" Return information on a dataset.
Arguments are :
ds --- a Dataset object or a filename
Keyword arguments are :
options --- return of gdal.InfoOptions(), string or array of strings
other keywords arguments of gdal.InfoOptions()
If options is provided as a gdal.InfoOptions() object, other keywords are ignored. """
Info（）可以用于设置gdal.InfoOptions（）的属性或gdal.Info（）的内联参数。参数可以指定为字符串数组、命令行语法或非二十进制关键字。因此，各种组合是可能的：
options = gdal.InfoOptions(format = 'json', computeChecksum = True)
gdal.Info(ds, options)
options = gdal.InfoOptions(options = ['-json', '-checksum'])
gdal.Info(ds, options)
options = gdal.InfoOptions(options = '-json -checksum')
gdal.Info(ds, options)
gdal.Info(ds, format = 'json', computeChecksum = True)
gdal.Info(ds, options = ['-json', '-checksum'])
gdal.Info(ds, options = '-json -checksum')
def TranslateOptions(options = [], format = 'GTiff',
outputType = GDT_Unknown, bandList = None, maskBand = None,
width = 0, height = 0, widthPct = 0.0, heightPct = 0.0,
xRes = 0.0, yRes = 0.0,
creationOptions = None, srcWin = None, projWin = None, projWinSRS = None, strict = False,
unscale = False, scaleParams = None, exponents = None,
outputBounds = None, metadataOptions = None,
outputSRS = None, GCPs = None,
noData = None, rgbExpand = None,
stats = False, rat = True, resampleAlg = None,
callback = None, callback_data = None):
""" Create a TranslateOptions() object that can be passed to gdal.Translate()
Keyword arguments are :
options --- can be be an array of strings, a string or let empty and filled from other keywords.
format --- output format ("GTiff", etc...)
outputType --- output type (gdal.GDT_Byte, etc...)
bandList --- array of band numbers (index start at 1)
maskBand --- mask band to generate or not ("none", "auto", "mask", 1, ...)
width --- width of the output raster in pixel
height --- height of the output raster in pixel
widthPct --- width of the output raster in percentage (100 = original width)
heightPct --- height of the output raster in percentage (100 = original height)
xRes --- output horizontal resolution
yRes --- output vertical resolution
creationOptions --- list of creation options
srcWin --- subwindow in pixels to extract: [left_x, top_y, width, height]
projWin --- subwindow in projected coordinates to extract: [ulx, uly, lrx, lry]
projWinSRS --- SRS in which projWin is expressed
strict --- strict mode
unscale --- unscale values with scale and offset metadata
scaleParams --- list of scale parameters, each of the form [src_min,src_max] or [src_min,src_max,dst_min,dst_max]
exponents --- list of exponentiation parameters
outputBounds --- assigned output bounds: [ulx, uly, lrx, lry]
metadataOptions --- list of metadata options
outputSRS --- assigned output SRS
GCPs --- list of GCPs
noData --- nodata value (or "none" to unset it)
rgbExpand --- Color palette expansion mode: "gray", "rgb", "rgba"
stats --- whether to calcule statistics
rat --- whether to write source RAT
resampleAlg --- resampling mode
callback --- callback method
callback_data --- user data for callback
"""
def Translate(destName, srcDS, **kwargs):
""" Convert a dataset.
Arguments are :
destName --- Output dataset name
srcDS --- a Dataset object or a filename
Keyword arguments are :
options --- return of gdal.InfoOptions(), string or array of strings
other keywords arguments of gdal.TranslateOptions()
If options is provided as a gdal.TranslateOptions() object, other keywords are ignored. """
def WarpOptions(options = [], format = 'GTiff',
outputBounds = None,
outputBoundsSRS = None,
xRes = None, yRes = None, targetAlignedPixels = False,
width = 0, height = 0,
srcSRS = None, dstSRS = None,
srcAlpha = False, dstAlpha = False,
warpOptions = None, errorThreshold = None,
warpMemoryLimit = None, creationOptions = None, outputType = GDT_Unknown,
workingType = GDT_Unknown, resampleAlg = None,
srcNodata = None, dstNodata = None, multithread = False,
tps = False, rpc = False, geoloc = False, polynomialOrder = None,
transformerOptions = None, cutlineDSName = None,
cutlineLayer = None, cutlineWhere = None, cutlineSQL = None, cutlineBlend = None, cropToCutline = False,
copyMetadata = True, metadataConflictValue = None,
setColorInterpretation = False,
callback = None, callback_data = None):
""" Create a WarpOptions() object that can be passed to gdal.Warp()
Keyword arguments are :
options --- can be be an array of strings, a string or let empty and filled from other keywords.
format --- output format ("GTiff", etc...)
outputBounds --- output bounds as (minX, minY, maxX, maxY) in target SRS
outputBoundsSRS --- SRS in which output bounds are expressed, in the case they are not expressed in dstSRS
xRes, yRes --- output resolution in target SRS
targetAlignedPixels --- whether to force output bounds to be multiple of output resolution
width --- width of the output raster in pixel
height --- height of the output raster in pixel
srcSRS --- source SRS
dstSRS --- output SRS
srcAlpha --- whether to force the last band of the input dataset to be considered as an alpha band
dstAlpha --- whether to force the creation of an output alpha band
outputType --- output type (gdal.GDT_Byte, etc...)
workingType --- working type (gdal.GDT_Byte, etc...)
warpOptions --- list of warping options
errorThreshold --- error threshold for approximation transformer (in pixels)
warpMemoryLimit --- size of working buffer in bytes
resampleAlg --- resampling mode
creationOptions --- list of creation options
srcNodata --- source nodata value(s)
dstNodata --- output nodata value(s)
multithread --- whether to multithread computation and I/O operations
tps --- whether to use Thin Plate Spline GCP transformer
rpc --- whether to use RPC transformer
geoloc --- whether to use GeoLocation array transformer
polynomialOrder --- order of polynomial GCP interpolation
transformerOptions --- list of transformer options
cutlineDSName --- cutline dataset name
cutlineLayer --- cutline layer name
cutlineWhere --- cutline WHERE clause
cutlineSQL --- cutline SQL statement
cutlineBlend --- cutline blend distance in pixels
cropToCutline --- whether to use cutline extent for output bounds
copyMetadata --- whether to copy source metadata
metadataConflictValue --- metadata data conflict value
setColorInterpretation --- whether to force color interpretation of input bands to output bands
callback --- callback method
callback_data --- user data for callback
"""
def Warp(destNameOrDestDS, srcDSOrSrcDSTab, **kwargs):
""" Warp one or several datasets.
Arguments are :
destNameOrDestDS --- Output dataset name or object
srcDSOrSrcDSTab --- an array of Dataset objects or filenames, or a Dataset object or a filename
Keyword arguments are :
options --- return of gdal.InfoOptions(), string or array of strings
other keywords arguments of gdal.WarpOptions()
If options is provided as a gdal.WarpOptions() object, other keywords are ignored. """
def VectorTranslateOptions(options = [], format = 'ESRI Shapefile',
accessMode = None,
srcSRS = None, dstSRS = None, reproject = True,
SQLStatement = None, SQLDialect = None, where = None, selectFields = None, spatFilter = None,
datasetCreationOptions = None,
layerCreationOptions = None,
layers = None,
layerName = None,
geometryType = None,
segmentizeMaxDist= None,
callback = None, callback_data = None):
""" Create a VectorTranslateOptions() object that can be passed to gdal.VectorTranslate()
Keyword arguments are :
options --- can be be an array of strings, a string or let empty and filled from other keywords.
format --- output format ("ESRI Shapefile", etc...)
accessMode --- None for creation, 'update', 'append', 'overwrite'
srcSRS --- source SRS
dstSRS --- output SRS (with reprojection if reproject = True)
reproject --- whether to do reprojection
SQLStatement --- SQL statement to apply to the source dataset
SQLDialect --- SQL dialect ('OGRSQL', 'SQLITE', ...)
where --- WHERE clause to apply to source layer(s)
selectFields --- list of fields to select
spatFilter --- spatial filter as (minX, minY, maxX, maxY) bounding box
datasetCreationOptions --- list of dataset creation options
layerCreationOptions --- list of layer creation options
layers --- list of layers to convert
layerName --- output layer name
geometryType --- output layer geometry type ('POINT', ....)
segmentizeMaxDist --- maximum distance between consecutive nodes of a line geometry
callback --- callback method
callback_data --- user data for callback
"""
def VectorTranslate(destNameOrDestDS, srcDS, **kwargs):
""" Convert one vector dataset
Arguments are :
destNameOrDestDS --- Output dataset name or object
srcDS --- a Dataset object or a filename
Keyword arguments are :
options --- return of gdal.InfoOptions(), string or array of strings
other keywords arguments of gdal.VectorTranslateOptions()
If options is provided as a gdal.VectorTranslateOptions() object, other keywords are ignored. """
def DEMProcessingOptions(options = [], colorFilename = None, format = 'GTiff',
creationOptions = None, computeEdges = False, alg = 'Horn', band = 1,
zFactor = None, scale = None, azimuth = None, altitude = None, combined = False,
slopeFormat = None, trigonometric = False, zeroForFlat = False,
callback = None, callback_data = None):
""" Create a DEMProcessingOptions() object that can be passed to gdal.DEMProcessing()
Keyword arguments are :
options --- can be be an array of strings, a string or let empty and filled from other keywords.
colorFilename --- (mandatory for "color-relief") name of file that contains palette definition for the "color-relief" processing.
format --- output format ("GTiff", etc...)
creationOptions --- list of creation options
computeEdges --- whether to compute values at raster edges.
alg --- 'ZevenbergenThorne' or 'Horn'
band --- source band number to use
zFactor --- (hillshade only) vertical exaggeration used to pre-multiply the elevations.
scale --- ratio of vertical units to horizontal.
azimuth --- (hillshade only) azimuth of the light, in degrees. 0 if it comes from the top of the raster, 90 from the east, ... The default value, 315, should rarely be changed as it is the value generally used to generate shaded maps.
altitude ---(hillshade only) altitude of the light, in degrees. 90 if the light comes from above the DEM, 0 if it is raking light.
combined --- (hillshade only) whether to compute combined shading, a combination of slope and oblique shading.
slopeformat --- (slope only) "degree" or "percent".
trigonometric --- (aspect only) whether to return trigonometric angle instead of azimuth. Thus 0deg means East, 90deg North, 180deg West, 270deg South.
zeroForFlat --- (aspect only) whether to return 0 for flat areas with slope=0, instead of -9999.
callback --- callback method
callback_data --- user data for callback
"""
def DEMProcessing(destName, srcDS, processing, **kwargs):
""" Apply a DEM processing.
Arguments are :
destName --- Output dataset name
srcDS --- a Dataset object or a filename
processing --- one of "hillshade", "slope", "aspect", "color-relief", "TRI", "TPI", "Roughness"
Keyword arguments are :
options --- return of gdal.InfoOptions(), string or array of strings
other keywords arguments of gdal.DEMProcessingOptions()
If options is provided as a gdal.DEMProcessingOptions() object, other keywords are ignored. """
def NearblackOptions(options = [], format = 'GTiff',
creationOptions = None, white = False, colors = None,
maxNonBlack = None, nearDist = None, setAlpha = False, setMask = False,
callback = None, callback_data = None):
""" Create a NearblackOptions() object that can be passed to gdal.Nearblack()
Keyword arguments are :
options --- can be be an array of strings, a string or let empty and filled from other keywords.
format --- output format ("GTiff", etc...)
creationOptions --- list of creation options
white --- whether to search for nearly white (255) pixels instead of nearly black pixels.
colors --- list of colors to search for, e.g. ((0,0,0),(255,255,255)). The pixels that are considered as the collar are set to 0
maxNonBlack --- number of non-black (or other searched colors specified with white / colors) pixels that can be encountered before the giving up search inwards. Defaults to 2.
nearDist --- select how far from black, white or custom colors the pixel values can be and still considered near black, white or custom color. Defaults to 15.
setAlpha --- adds an alpha band if the output file.
setMask --- adds a mask band to the output file.
callback --- callback method
callback_data --- user data for callback
"""
def Nearblack(destNameOrDestDS, srcDS, **kwargs):
""" Convert nearly black/white borders to exact value.
Arguments are :
destNameOrDestDS --- Output dataset name or object
srcDS --- a Dataset object or a filename
Keyword arguments are :
options --- return of gdal.InfoOptions(), string or array of strings
other keywords arguments of gdal.NearblackOptions()
If options is provided as a gdal.NearblackOptions() object, other keywords are ignored. """
def GridOptions(options = [], format = 'GTiff',
outputType = GDT_Unknown,
width = 0, height = 0,
creationOptions = None,
outputBounds = None,
outputSRS = None,
noData = None,
algorithm = None,
layers = None,
SQLStatement = None,
where = None,
spatFilter = None,
zfield = None,
z_increase = None,
z_multiply = None,
callback = None, callback_data = None):
""" Create a GridOptions() object that can be passed to gdal.Grid()
Keyword arguments are :
options --- can be be an array of strings, a string or let empty and filled from other keywords.
format --- output format ("GTiff", etc...)
outputType --- output type (gdal.GDT_Byte, etc...)
width --- width of the output raster in pixel
height --- height of the output raster in pixel
creationOptions --- list of creation options
outputBounds --- assigned output bounds: [ulx, uly, lrx, lry]
outputSRS --- assigned output SRS
noData --- nodata value
algorithm --- e.g "invdist:power=2.0:smoothing=0.0:radius1=0.0:radius2=0.0:angle=0.0:max_points=0:min_points=0:nodata=0.0"
layers --- list of layers to convert
SQLStatement --- SQL statement to apply to the source dataset
where --- WHERE clause to apply to source layer(s)
spatFilter --- spatial filter as (minX, minY, maxX, maxY) bounding box
zfield --- Identifies an attribute field on the features to be used to get a Z value from. This value overrides Z value read from feature geometry record.
z_increase --- Addition to the attribute field on the features to be used to get a Z value from. The addition should be the same unit as Z value. The result value will be Z value + Z increase value. The default value is 0.
z_multiply - Multiplication ratio for Z field. This can be used for shift from e.g. foot to meters or from elevation to deep. The result value will be (Z value + Z increase value) * Z multiply value. The default value is 1.
callback --- callback method
callback_data --- user data for callback
"""
def Grid(destName, srcDS, **kwargs):
""" Create raster from the scattered data.
Arguments are :
destName --- Output dataset name
srcDS --- a Dataset object or a filename
Keyword arguments are :
options --- return of gdal.InfoOptions(), string or array of strings
other keywords arguments of gdal.GridOptions()
If options is provided as a gdal.GridOptions() object, other keywords are ignored. """
def RasterizeOptions(options = [], format = None,
creationOptions = None, noData = None, initValues = None,
outputBounds = None, outputSRS = None,
width = None, height = None,
xRes = None, yRes = None, targetAlignedPixels = False,
bands = None, inverse = False, allTouched = False,
burnValues = None, attribute = None, useZ = False, layers = None,
SQLStatement = None, SQLDialect = None, where = None,
callback = None, callback_data = None):
""" Create a RasterizeOptions() object that can be passed to gdal.Rasterize()
Keyword arguments are :
options --- can be be an array of strings, a string or let empty and filled from other keywords.
format --- output format ("GTiff", etc...)
creationOptions --- list of creation options
outputBounds --- assigned output bounds: [minx, miny, maxx, maxy]
outputSRS --- assigned output SRS
width --- width of the output raster in pixel
height --- height of the output raster in pixel
xRes, yRes --- output resolution in target SRS
targetAlignedPixels --- whether to force output bounds to be multiple of output resolution
noData --- nodata value
initValues --- Value or list of values to pre-initialize the output image bands with. However, it is not marked as the nodata value in the output file. If only one value is given, the same value is used in all the bands.
bands --- list of output bands to burn values into
inverse --- whether to invert rasterization, ie burn the fixed burn value, or the burn value associated with the first feature into all parts of the image not inside the provided a polygon.
allTouched -- whether to enable the ALL_TOUCHED rasterization option so that all pixels touched by lines or polygons will be updated, not just those on the line render path, or whose center point is within the polygon.
burnValues -- list of fixed values to burn into each band for all objects. Excusive with attribute.
attribute --- identifies an attribute field on the features to be used for a burn-in value. The value will be burned into all output bands. Excusive with burnValues.
useZ --- whether to indicate that a burn value should be extracted from the "Z" values of the feature. These values are added to the burn value given by burnValues or attribute if provided. As of now, only points and lines are drawn in 3D.
layers --- list of layers from the datasource that will be used for input features.
SQLStatement --- SQL statement to apply to the source dataset
SQLDialect --- SQL dialect ('OGRSQL', 'SQLITE', ...)
where --- WHERE clause to apply to source layer(s)
callback --- callback method
callback_data --- user data for callback
"""
def Rasterize(destNameOrDestDS, srcDS, **kwargs):
""" Burns vector geometries into a raster
Arguments are :
destNameOrDestDS --- Output dataset name or object
srcDS --- a Dataset object or a filename
Keyword arguments are :
options --- return of gdal.InfoOptions(), string or array of strings
other keywords arguments of gdal.RasterizeOptions()
If options is provided as a gdal.RasterizeOptions() object, other keywords are ignored. """
def BuildVRTOptions(options = [],
resolution = None,
outputBounds = None,
xRes = None, yRes = None,
targetAlignedPixels = None,
separate = None,
bandList = None,
addAlpha = None,
resampleAlg = None,
outputSRS = None,
allowProjectionDifference = None,
srcNodata = None,
VRTNodata = None,
hideNodata = None,
callback = None, callback_data = None):
""" Create a BuildVRTOptions() object that can be passed to gdal.BuildVRT()
Keyword arguments are :
options --- can be be an array of strings, a string or let empty and filled from other keywords..
resolution --- 'highest', 'lowest', 'average', 'user'.
outputBounds --- output bounds as (minX, minY, maxX, maxY) in target SRS.
xRes, yRes --- output resolution in target SRS.
targetAlignedPixels --- whether to force output bounds to be multiple of output resolution.
separate --- whether each source file goes into a separate stacked band in the VRT band.
bandList --- array of band numbers (index start at 1).
addAlpha --- whether to add an alpha mask band to the VRT when the source raster have none.
resampleAlg --- resampling mode.
outputSRS --- assigned output SRS.
allowProjectionDifference --- whether to accept input datasets have not the same projection. Note: they will *not* be reprojected.
srcNodata --- source nodata value(s).
VRTNodata --- nodata values at the VRT band level.
hideNodata --- whether to make the VRT band not report the NoData value.
callback --- callback method.
callback_data --- user data for callback.
"""
def BuildVRT(destName, srcDSOrSrcDSTab, **kwargs):
""" Build a VRT from a list of datasets.
Arguments are :
destName --- Output dataset name
srcDSOrSrcDSTab --- an array of Dataset objects or filenames, or a Dataset object or a filename
Keyword arguments are :
options --- return of gdal.InfoOptions(), string or array of strings
other keywords arguments of gdal.BuildVRTOptions()
If options is provided as a gdal.BuildVRTOptions() object, other keywords are ignored. """
公用事业
修改实用程序以调用相应的函数。
文档
所有新的方法/功能都记录在案。
测试套件
gdal.Info方法在 test_gdalinfo_lib.py .
gdal.Translate方法在 test_gdal_translate_lib.py
gdal.Warp方法在 test_gdalwarp_lib.py
gdal.VectorTranslate方法在 test_ogr2ogr_lib.py
gdal.DEMProcessing方法在 test_gdaldem_lib.py
gdal.Nearblack方法在 test_nearblack_lib.py
网格方法在 test_gdal_grid_lib.py
gdal.Rasterize 方法在 test_gdal_rasterize_lib.py .
gdal.BuildVRT方法在 test_gdalbuildvrt_lib.py .
兼容性问题
不需要。命令行实用程序将保持相同的接口。通过确保其在自动测试/实用程序中的测试仍然通过，将对其进行检查。
实施
实现将由Faza Mahamood甚至Rouault完成
gdalinfo和gdal_translate的拟议实现位于 https://github.com/rouault/gdal2/tree/rfc59.1 .
投票历史
+丹尼尔姆和埃文的一个