1 | #!/usr/bin/env python |
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2 | ############################################################################### |
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3 | # $Id: gdal_merge.py 18412 2009-12-30 12:53:37Z chaitanya $ |
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4 | # |
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5 | # Project: InSAR Peppers |
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6 | # Purpose: Module to extract data from many rasters into one output. |
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7 | # Author: Frank Warmerdam, warmerdam@pobox.com |
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8 | # |
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9 | ############################################################################### |
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10 | # Copyright (c) 2000, Atlantis Scientific Inc. (www.atlsci.com) |
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11 | # |
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12 | # This library is free software; you can redistribute it and/or |
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13 | # modify it under the terms of the GNU Library General Public |
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14 | # License as published by the Free Software Foundation; either |
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15 | # version 2 of the License, or (at your option) any later version. |
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16 | # |
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17 | # This library is distributed in the hope that it will be useful, |
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18 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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19 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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20 | # Library General Public License for more details. |
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21 | # |
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22 | # You should have received a copy of the GNU Library General Public |
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23 | # License along with this library; if not, write to the |
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24 | # Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
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25 | # Boston, MA 02111-1307, USA. |
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26 | ############################################################################### |
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27 | |
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28 | try: |
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29 | from osgeo import gdal |
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30 | gdal.TermProgress = gdal.TermProgress_nocb |
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31 | except ImportError: |
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32 | import gdal |
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33 | |
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34 | import sys |
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35 | import glob |
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36 | |
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37 | __version__ = '$id$'[5:-1] |
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38 | verbose = 0 |
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39 | quiet = 0 |
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40 | |
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41 | |
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42 | # ============================================================================= |
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43 | def raster_copy( s_fh, s_xoff, s_yoff, s_xsize, s_ysize, s_band_n, |
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44 | t_fh, t_xoff, t_yoff, t_xsize, t_ysize, t_band_n, |
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45 | nodata=None ): |
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46 | |
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47 | if nodata is not None: |
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48 | return raster_copy_with_nodata( |
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49 | s_fh, s_xoff, s_yoff, s_xsize, s_ysize, s_band_n, |
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50 | t_fh, t_xoff, t_yoff, t_xsize, t_ysize, t_band_n, |
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51 | nodata ) |
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52 | |
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53 | if verbose != 0: |
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54 | print('Copy %d,%d,%d,%d to %d,%d,%d,%d.' \ |
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55 | % (s_xoff, s_yoff, s_xsize, s_ysize, |
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56 | t_xoff, t_yoff, t_xsize, t_ysize )) |
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57 | |
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58 | s_band = s_fh.GetRasterBand( s_band_n ) |
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59 | t_band = t_fh.GetRasterBand( t_band_n ) |
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60 | |
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61 | data = s_band.ReadRaster( s_xoff, s_yoff, s_xsize, s_ysize, |
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62 | t_xsize, t_ysize, t_band.DataType ) |
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63 | t_band.WriteRaster( t_xoff, t_yoff, t_xsize, t_ysize, |
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64 | data, t_xsize, t_ysize, t_band.DataType ) |
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65 | |
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66 | |
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67 | return 0 |
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68 | |
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69 | # ============================================================================= |
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70 | def raster_copy_with_nodata( s_fh, s_xoff, s_yoff, s_xsize, s_ysize, s_band_n, |
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71 | t_fh, t_xoff, t_yoff, t_xsize, t_ysize, t_band_n, |
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72 | nodata ): |
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73 | try: |
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74 | import numpy as Numeric |
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75 | except ImportError: |
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76 | import Numeric |
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77 | |
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78 | if verbose != 0: |
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79 | print('Copy %d,%d,%d,%d to %d,%d,%d,%d.' \ |
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80 | % (s_xoff, s_yoff, s_xsize, s_ysize, |
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81 | t_xoff, t_yoff, t_xsize, t_ysize )) |
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82 | |
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83 | s_band = s_fh.GetRasterBand( s_band_n ) |
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84 | t_band = t_fh.GetRasterBand( t_band_n ) |
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85 | |
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86 | data_src = s_band.ReadAsArray( s_xoff, s_yoff, s_xsize, s_ysize, |
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87 | t_xsize, t_ysize ) |
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88 | data_dst = t_band.ReadAsArray( t_xoff, t_yoff, t_xsize, t_ysize ) |
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89 | |
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90 | nodata_test = Numeric.equal(data_src,nodata) |
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91 | to_write = Numeric.choose( nodata_test, (data_src, data_dst) ) |
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92 | |
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93 | t_band.WriteArray( to_write, t_xoff, t_yoff ) |
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94 | |
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95 | return 0 |
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96 | |
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97 | # ============================================================================= |
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98 | def names_to_fileinfos( names ): |
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99 | """ |
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100 | Translate a list of GDAL filenames, into file_info objects. |
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101 | |
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102 | names -- list of valid GDAL dataset names. |
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103 | |
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104 | Returns a list of file_info objects. There may be less file_info objects |
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105 | than names if some of the names could not be opened as GDAL files. |
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106 | """ |
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107 | |
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108 | file_infos = [] |
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109 | for name in names: |
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110 | fi = file_info() |
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111 | if fi.init_from_name( name ) == 1: |
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112 | file_infos.append( fi ) |
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113 | |
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114 | return file_infos |
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115 | |
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116 | # ***************************************************************************** |
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117 | class file_info: |
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118 | """A class holding information about a GDAL file.""" |
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119 | |
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120 | def init_from_name(self, filename): |
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121 | """ |
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122 | Initialize file_info from filename |
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123 | |
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124 | filename -- Name of file to read. |
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125 | |
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126 | Returns 1 on success or 0 if the file can't be opened. |
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127 | """ |
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128 | fh = gdal.Open( filename ) |
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129 | if fh is None: |
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130 | return 0 |
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131 | |
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132 | self.filename = filename |
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133 | self.bands = fh.RasterCount |
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134 | self.xsize = fh.RasterXSize |
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135 | self.ysize = fh.RasterYSize |
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136 | self.band_type = fh.GetRasterBand(1).DataType |
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137 | self.projection = fh.GetProjection() |
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138 | self.geotransform = fh.GetGeoTransform() |
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139 | self.ulx = self.geotransform[0] |
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140 | self.uly = self.geotransform[3] |
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141 | self.lrx = self.ulx + self.geotransform[1] * self.xsize |
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142 | self.lry = self.uly + self.geotransform[5] * self.ysize |
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143 | |
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144 | ct = fh.GetRasterBand(1).GetRasterColorTable() |
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145 | if ct is not None: |
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146 | self.ct = ct.Clone() |
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147 | else: |
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148 | self.ct = None |
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149 | |
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150 | return 1 |
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151 | |
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152 | def report( self ): |
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153 | print('Filename: '+ self.filename) |
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154 | print('File Size: %dx%dx%d' \ |
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155 | % (self.xsize, self.ysize, self.bands)) |
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156 | print('Pixel Size: %f x %f' \ |
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157 | % (self.geotransform[1],self.geotransform[5])) |
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158 | print('UL:(%f,%f) LR:(%f,%f)' \ |
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159 | % (self.ulx,self.uly,self.lrx,self.lry)) |
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160 | |
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161 | def copy_into( self, t_fh, s_band = 1, t_band = 1, nodata_arg=None ): |
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162 | """ |
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163 | Copy this files image into target file. |
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164 | |
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165 | This method will compute the overlap area of the file_info objects |
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166 | file, and the target gdal.Dataset object, and copy the image data |
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167 | for the common window area. It is assumed that the files are in |
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168 | a compatible projection ... no checking or warping is done. However, |
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169 | if the destination file is a different resolution, or different |
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170 | image pixel type, the appropriate resampling and conversions will |
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171 | be done (using normal GDAL promotion/demotion rules). |
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172 | |
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173 | t_fh -- gdal.Dataset object for the file into which some or all |
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174 | of this file may be copied. |
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175 | |
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176 | Returns 1 on success (or if nothing needs to be copied), and zero one |
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177 | failure. |
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178 | """ |
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179 | t_geotransform = t_fh.GetGeoTransform() |
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180 | t_ulx = t_geotransform[0] |
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181 | t_uly = t_geotransform[3] |
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182 | t_lrx = t_geotransform[0] + t_fh.RasterXSize * t_geotransform[1] |
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183 | t_lry = t_geotransform[3] + t_fh.RasterYSize * t_geotransform[5] |
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184 | |
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185 | # figure out intersection region |
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186 | tgw_ulx = max(t_ulx,self.ulx) |
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187 | tgw_lrx = min(t_lrx,self.lrx) |
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188 | if t_geotransform[5] < 0: |
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189 | tgw_uly = min(t_uly,self.uly) |
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190 | tgw_lry = max(t_lry,self.lry) |
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191 | else: |
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192 | tgw_uly = max(t_uly,self.uly) |
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193 | tgw_lry = min(t_lry,self.lry) |
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194 | |
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195 | # do they even intersect? |
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196 | if tgw_ulx >= tgw_lrx: |
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197 | return 1 |
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198 | if t_geotransform[5] < 0 and tgw_uly <= tgw_lry: |
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199 | return 1 |
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200 | if t_geotransform[5] > 0 and tgw_uly >= tgw_lry: |
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201 | return 1 |
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202 | |
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203 | # compute target window in pixel coordinates. |
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204 | tw_xoff = int((tgw_ulx - t_geotransform[0]) / t_geotransform[1] + 0.1) |
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205 | tw_yoff = int((tgw_uly - t_geotransform[3]) / t_geotransform[5] + 0.1) |
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206 | tw_xsize = int((tgw_lrx - t_geotransform[0])/t_geotransform[1] + 0.5) \ |
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207 | - tw_xoff |
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208 | tw_ysize = int((tgw_lry - t_geotransform[3])/t_geotransform[5] + 0.5) \ |
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209 | - tw_yoff |
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210 | |
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211 | if tw_xsize < 1 or tw_ysize < 1: |
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212 | return 1 |
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213 | |
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214 | # Compute source window in pixel coordinates. |
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215 | sw_xoff = int((tgw_ulx - self.geotransform[0]) / self.geotransform[1]) |
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216 | sw_yoff = int((tgw_uly - self.geotransform[3]) / self.geotransform[5]) |
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217 | sw_xsize = int((tgw_lrx - self.geotransform[0]) \ |
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218 | / self.geotransform[1] + 0.5) - sw_xoff |
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219 | sw_ysize = int((tgw_lry - self.geotransform[3]) \ |
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220 | / self.geotransform[5] + 0.5) - sw_yoff |
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221 | |
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222 | if sw_xsize < 1 or sw_ysize < 1: |
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223 | return 1 |
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224 | |
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225 | # Open the source file, and copy the selected region. |
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226 | s_fh = gdal.Open( self.filename ) |
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227 | |
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228 | return \ |
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229 | raster_copy( s_fh, sw_xoff, sw_yoff, sw_xsize, sw_ysize, s_band, |
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230 | t_fh, tw_xoff, tw_yoff, tw_xsize, tw_ysize, t_band, |
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231 | nodata_arg ) |
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232 | |
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233 | |
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234 | # ============================================================================= |
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235 | def Usage(): |
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236 | print('Usage: gdal_merge.py [-o out_filename] [-of out_format] [-co NAME=VALUE]*') |
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237 | print(' [-ps pixelsize_x pixelsize_y] [-separate] [-q] [-v] [-pct]') |
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238 | print(' [-ul_lr ulx uly lrx lry] [-n nodata_value] [-init value]') |
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239 | print(' [-ot datatype] [-createonly] input_files') |
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240 | print(' [--help-general]') |
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241 | print('') |
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242 | |
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243 | # ============================================================================= |
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244 | # |
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245 | # Program mainline. |
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246 | # |
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247 | |
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248 | def main( argv=None ): |
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249 | |
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250 | names = [] |
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251 | format = 'GTiff' |
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252 | out_file = 'out.tif' |
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253 | |
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254 | ulx = None |
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255 | psize_x = None |
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256 | separate = 0 |
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257 | copy_pct = 0 |
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258 | nodata = None |
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259 | create_options = [] |
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260 | pre_init = None |
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261 | band_type = None |
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262 | createonly = 0 |
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263 | |
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264 | gdal.AllRegister() |
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265 | if argv is None: |
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266 | argv = sys.argv |
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267 | argv = gdal.GeneralCmdLineProcessor( argv ) |
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268 | if argv is None: |
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269 | sys.exit( 0 ) |
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270 | |
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271 | # Parse command line arguments. |
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272 | i = 1 |
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273 | while i < len(argv): |
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274 | arg = argv[i] |
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275 | |
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276 | if arg == '-o': |
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277 | i = i + 1 |
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278 | out_file = argv[i] |
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279 | |
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280 | elif arg == '-v': |
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281 | verbose = 1 |
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282 | |
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283 | elif arg == '-q' or arg == '-quiet': |
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284 | quiet = 1 |
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285 | |
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286 | elif arg == '-createonly': |
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287 | createonly = 1 |
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288 | |
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289 | elif arg == '-separate': |
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290 | separate = 1 |
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291 | |
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292 | elif arg == '-seperate': |
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293 | separate = 1 |
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294 | |
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295 | elif arg == '-pct': |
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296 | copy_pct = 1 |
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297 | |
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298 | elif arg == '-ot': |
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299 | i = i + 1 |
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300 | band_type = gdal.GetDataTypeByName( argv[i] ) |
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301 | if band_type == gdal.GDT_Unknown: |
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302 | print('Unknown GDAL data type: ', argv[i]) |
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303 | sys.exit( 1 ) |
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304 | |
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305 | elif arg == '-init': |
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306 | i = i + 1 |
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307 | pre_init = float(argv[i]) |
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308 | |
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309 | elif arg == '-n': |
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310 | i = i + 1 |
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311 | nodata = float(argv[i]) |
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312 | |
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313 | elif arg == '-f': |
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314 | # for backward compatibility. |
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315 | i = i + 1 |
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316 | format = argv[i] |
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317 | |
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318 | elif arg == '-of': |
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319 | i = i + 1 |
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320 | format = argv[i] |
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321 | |
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322 | elif arg == '-co': |
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323 | i = i + 1 |
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324 | create_options.append( argv[i] ) |
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325 | |
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326 | elif arg == '-ps': |
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327 | psize_x = float(argv[i+1]) |
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328 | psize_y = -1 * abs(float(argv[i+2])) |
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329 | i = i + 2 |
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330 | |
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331 | elif arg == '-ul_lr': |
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332 | ulx = float(argv[i+1]) |
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333 | uly = float(argv[i+2]) |
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334 | lrx = float(argv[i+3]) |
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335 | lry = float(argv[i+4]) |
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336 | i = i + 4 |
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337 | |
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338 | elif arg[:1] == '-': |
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339 | print('Unrecognised command option: ', arg) |
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340 | Usage() |
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341 | sys.exit( 1 ) |
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342 | |
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343 | else: |
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344 | # Expand any possible wildcards from command line arguments |
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345 | f = glob.glob( arg ) |
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346 | if len(f) == 0: |
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347 | print('File not found: "%s"' % (str( arg ))) |
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348 | names += f # append 1 or more files |
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349 | i = i + 1 |
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350 | |
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351 | if len(names) == 0: |
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352 | print('No input files selected.') |
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353 | Usage() |
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354 | sys.exit( 1 ) |
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355 | |
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356 | Driver = gdal.GetDriverByName(format) |
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357 | if Driver is None: |
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358 | print('Format driver %s not found, pick a supported driver.' % format) |
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359 | sys.exit( 1 ) |
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360 | |
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361 | DriverMD = Driver.GetMetadata() |
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362 | if 'DCAP_CREATE' not in DriverMD: |
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363 | print('Format driver %s does not support creation and piecewise writing.\nPlease select a format that does, such as GTiff (the default) or HFA (Erdas Imagine).' % format) |
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364 | sys.exit( 1 ) |
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365 | |
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366 | # Collect information on all the source files. |
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367 | file_infos = names_to_fileinfos( names ) |
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368 | |
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369 | if ulx is None: |
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370 | ulx = file_infos[0].ulx |
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371 | uly = file_infos[0].uly |
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372 | lrx = file_infos[0].lrx |
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373 | lry = file_infos[0].lry |
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374 | |
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375 | for fi in file_infos: |
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376 | ulx = min(ulx, fi.ulx) |
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377 | uly = max(uly, fi.uly) |
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378 | lrx = max(lrx, fi.lrx) |
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379 | lry = min(lry, fi.lry) |
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380 | |
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381 | if psize_x is None: |
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382 | psize_x = file_infos[0].geotransform[1] |
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383 | psize_y = file_infos[0].geotransform[5] |
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384 | |
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385 | if band_type is None: |
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386 | band_type = file_infos[0].band_type |
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387 | |
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388 | # Try opening as an existing file. |
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389 | gdal.PushErrorHandler( 'CPLQuietErrorHandler' ) |
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390 | t_fh = gdal.Open( out_file, gdal.GA_Update ) |
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391 | gdal.PopErrorHandler() |
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392 | |
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393 | # Create output file if it does not already exist. |
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394 | if t_fh is None: |
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395 | geotransform = [ulx, psize_x, 0, uly, 0, psize_y] |
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396 | |
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397 | xsize = int((lrx - ulx) / geotransform[1] + 0.5) |
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398 | ysize = int((lry - uly) / geotransform[5] + 0.5) |
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399 | |
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400 | if separate != 0: |
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401 | bands = len(file_infos) |
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402 | else: |
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403 | bands = file_infos[0].bands |
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404 | |
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405 | t_fh = Driver.Create( out_file, xsize, ysize, bands, |
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406 | band_type, create_options ) |
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407 | if t_fh is None: |
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408 | print('Creation failed, terminating gdal_merge.') |
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409 | sys.exit( 1 ) |
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410 | |
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411 | t_fh.SetGeoTransform( geotransform ) |
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412 | t_fh.SetProjection( file_infos[0].projection ) |
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413 | |
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414 | if copy_pct: |
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415 | t_fh.GetRasterBand(1).SetRasterColorTable(file_infos[0].ct) |
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416 | else: |
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417 | if separate != 0: |
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418 | bands = len(file_infos) |
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419 | if t_fh.RasterCount < bands : |
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420 | print('Existing output file has less bands than the number of input files. You should delete it before. Terminating gdal_merge.') |
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421 | sys.exit( 1 ) |
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422 | else: |
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423 | bands = min(file_infos[0].bands,t_fh.RasterCount) |
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424 | |
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425 | # Do we need to pre-initialize the whole mosaic file to some value? |
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426 | if pre_init is not None: |
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427 | for i in range(t_fh.RasterCount): |
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428 | t_fh.GetRasterBand(i+1).Fill( pre_init ) |
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429 | |
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430 | # Copy data from source files into output file. |
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431 | t_band = 1 |
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432 | |
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433 | if quiet == 0 and verbose == 0: |
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434 | gdal.TermProgress( 0.0 ) |
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435 | fi_processed = 0 |
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436 | |
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437 | for fi in file_infos: |
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438 | if createonly != 0: |
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439 | continue |
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440 | |
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441 | if verbose != 0: |
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442 | print("") |
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443 | print("Processing file %5d of %5d, %6.3f%% completed." \ |
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444 | % (fi_processed+1,len(file_infos), |
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445 | fi_processed * 100.0 / len(file_infos)) ) |
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446 | fi.report() |
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447 | |
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448 | if separate == 0 : |
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449 | for band in range(1, bands+1): |
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450 | fi.copy_into( t_fh, band, band, nodata ) |
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451 | else: |
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452 | fi.copy_into( t_fh, 1, t_band, nodata ) |
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453 | t_band = t_band+1 |
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454 | |
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455 | fi_processed = fi_processed+1 |
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456 | if quiet == 0 and verbose == 0: |
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457 | gdal.TermProgress( fi_processed / float(len(file_infos)) ) |
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458 | |
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459 | # Force file to be closed. |
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460 | t_fh = None |
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461 | |
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462 | if __name__ == '__main__': |
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463 | sys.exit(main()) |
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