gdal_retile.py 32.8 KB
Newer Older
xuebingbing's avatar
xuebingbing committed
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022
#!/usr/bin/env python
###############################################################################
#  $Id: gdal_retile.py f894c441f4b5830a9801bfb3dda556b1baa7ee9f 2019-02-22 12:37:35Z DanielEvans $
#
# Purpose:  Module for retiling (merging) tiles and building tiled pyramids
# Author:   Christian Meuller, christian.mueller@nvoe.at
# UseDirForEachRow support by Chris Giesey & Elijah Robison
#
###############################################################################
# Copyright (c) 2007, Christian Mueller
# Copyright (c) 2009-2012, Even Rouault <even dot rouault at mines-paris dot org>
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the "Software"),
# to deal in the Software without restriction, including without limitation
# the rights to use, copy, modify, merge, publish, distribute, sublicense,
# and/or sell copies of the Software, and to permit persons to whom the
# Software is furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
# DEALINGS IN THE SOFTWARE.
###############################################################################

import os
import sys

from osgeo import gdal
from osgeo import ogr
from osgeo import osr

progress = gdal.TermProgress_nocb


class AffineTransformDecorator(object):
    """ A class providing some useful methods for affine Transformations """

    def __init__(self, transform):
        self.lrx = None
        self.lry = None
        self.geotransform = transform
        self.scaleX = self.geotransform[1]
        self.scaleY = self.geotransform[5]
        if self.scaleY > 0:
            self.scaleY *= -1
        self.ulx = self.geotransform[0]
        self.uly = self.geotransform[3]

    def pointsFor(self, width, height):
        xlist = []
        ylist = []
        w = self.scaleX * width
        h = self.scaleY * height

        xlist.append(self.ulx)
        ylist.append(self.uly)
        xlist.append(self.ulx + w)
        ylist.append(self.uly)
        xlist.append(self.ulx + w)
        ylist.append(self.uly + h)
        xlist.append(self.ulx)
        ylist.append(self.uly + h)
        return [xlist, ylist]


class DataSetCache(object):
    """ A class for caching source tiles """

    def __init__(self):
        self.cacheSize = 8
        self.queue = []
        self.dict = {}

    def get(self, name):

        if name in self.dict:
            return self.dict[name]
        result = gdal.Open(name)
        if result is None:
            print("Error opening: %s" % NameError)
            sys.exit(1)
        if len(self.queue) == self.cacheSize:
            toRemove = self.queue.pop(0)
            del self.dict[toRemove]
        self.queue.append(name)
        self.dict[name] = result
        return result

    def __del__(self):
        for dataset in self.dict.values():
            del dataset
        del self.queue
        del self.dict


class tile_info(object):
    """ A class holding info how to tile """

    def __init__(self, xsize, ysize, tileWidth, tileHeight, overlap):
        self.width = xsize
        self.height = ysize
        self.tileWidth = tileWidth
        self.tileHeight = tileHeight
        self.countTilesX = 1
        if xsize > tileWidth:
            self.countTilesX += int((xsize - tileWidth + (tileWidth - overlap) - 1) / (tileWidth - overlap))
        self.countTilesY = 1
        if ysize > tileHeight:
            self.countTilesY += int((ysize - tileHeight + (tileHeight - overlap) - 1) / (tileHeight - overlap))
        self.overlap = overlap

    def report(self):
        print('tileWidth:   %d' % self.tileWidth)
        print('tileHeight:  %d' % self.tileHeight)
        print('countTilesX: %d' % self.countTilesX)
        print('countTilesY: %d' % self.countTilesY)
        print('overlap:     %d' % self.overlap)


class mosaic_info(object):
    """A class holding information about a GDAL file or a GDAL fileset"""

    def __init__(self, filename, inputDS):
        """
        Initialize mosaic_info from filename

        filename -- Name of file to read.

        """
        self.TempDriver = gdal.GetDriverByName("MEM")
        self.filename = filename
        self.cache = DataSetCache()
        self.ogrTileIndexDS = inputDS

        self.ogrTileIndexDS.GetLayer().ResetReading()
        feature = self.ogrTileIndexDS.GetLayer().GetNextFeature()
        imgLocation = feature.GetField(0)

        fhInputTile = self.cache.get(imgLocation)

        self.bands = fhInputTile.RasterCount
        self.band_type = fhInputTile.GetRasterBand(1).DataType
        self.projection = fhInputTile.GetProjection()
        self.nodata = fhInputTile.GetRasterBand(1).GetNoDataValue()

        dec = AffineTransformDecorator(fhInputTile.GetGeoTransform())
        self.scaleX = dec.scaleX
        self.scaleY = dec.scaleY
        ct = fhInputTile.GetRasterBand(1).GetRasterColorTable()
        if ct is not None:
            self.ct = ct.Clone()
        else:
            self.ct = None
        self.ci = [0] * self.bands
        for iband in range(self.bands):
            self.ci[iband] = fhInputTile.GetRasterBand(iband + 1).GetRasterColorInterpretation()

        extent = self.ogrTileIndexDS.GetLayer().GetExtent()
        self.ulx = extent[0]
        self.uly = extent[3]
        self.lrx = extent[1]
        self.lry = extent[2]

        self.xsize = int(round((self.lrx - self.ulx) / self.scaleX))
        self.ysize = abs(int(round((self.uly - self.lry) / self.scaleY)))

    def __del__(self):
        del self.cache
        del self.ogrTileIndexDS

    def getDataSet(self, minx, miny, maxx, maxy):

        self.ogrTileIndexDS.GetLayer().ResetReading()
        self.ogrTileIndexDS.GetLayer().SetSpatialFilterRect(minx, miny, maxx, maxy)
        features = []
        envelope = None
        while True:
            feature = self.ogrTileIndexDS.GetLayer().GetNextFeature()
            if feature is None:
                break
            features.append(feature)
            if envelope is None:
                envelope = feature.GetGeometryRef().GetEnvelope()
            else:
                featureEnv = feature.GetGeometryRef().GetEnvelope()
                envelope = (min(featureEnv[0], envelope[0]), max(featureEnv[1], envelope[1]),
                            min(featureEnv[2], envelope[2]), max(featureEnv[3], envelope[3]))

        if envelope is None:
            return None

        # enlarge to query rect if necessary
        envelope = (min(minx, envelope[0]), max(maxx, envelope[1]),
                    min(miny, envelope[2]), max(maxy, envelope[3]))

        self.ogrTileIndexDS.GetLayer().SetSpatialFilter(None)

        # merge tiles

        resultSizeX = int((maxx - minx) / self.scaleX + 0.5)
        resultSizeY = int((miny - maxy) / self.scaleY + 0.5)

        resultDS = self.TempDriver.Create("TEMP", resultSizeX, resultSizeY, self.bands, self.band_type, [])
        resultDS.SetGeoTransform([minx, self.scaleX, 0, maxy, 0, self.scaleY])

        for bandNr in range(1, self.bands + 1):
            t_band = resultDS.GetRasterBand(bandNr)
            if self.nodata is not None:
                t_band.Fill(self.nodata)
                t_band.SetNoDataValue(self.nodata)

        for feature in features:
            featureName = feature.GetField(0)
            sourceDS = self.cache.get(featureName)
            dec = AffineTransformDecorator(sourceDS.GetGeoTransform())

            dec.lrx = dec.ulx + sourceDS.RasterXSize * dec.scaleX
            dec.lry = dec.uly + sourceDS.RasterYSize * dec.scaleY

            # Find the intersection region
            tgw_ulx = max(dec.ulx, minx)
            tgw_lrx = min(dec.lrx, maxx)
            if self.scaleY < 0:
                tgw_uly = min(dec.uly, maxy)
                tgw_lry = max(dec.lry, miny)
            else:
                tgw_uly = max(dec.uly, maxy)
                tgw_lry = min(dec.lry, miny)

            # Compute source window in pixel coordinates.
            sw_xoff = int((tgw_ulx - dec.ulx) / dec.scaleX + 0.5)
            sw_yoff = int((tgw_uly - dec.uly) / dec.scaleY + 0.5)
            sw_xsize = min(sourceDS.RasterXSize, int((tgw_lrx - dec.ulx) / dec.scaleX + 0.5)) - sw_xoff
            sw_ysize = min(sourceDS.RasterYSize, int((tgw_lry - dec.uly) / dec.scaleY + 0.5)) - sw_yoff
            if sw_xsize <= 0 or sw_ysize <= 0:
                continue

            # Compute target window in pixel coordinates
            tw_xoff = int((tgw_ulx - minx) / self.scaleX + 0.5)
            tw_yoff = int((tgw_uly - maxy) / self.scaleY + 0.5)
            tw_xsize = min(resultDS.RasterXSize, int((tgw_lrx - minx) / self.scaleX + 0.5)) - tw_xoff
            tw_ysize = min(resultDS.RasterYSize, int((tgw_lry - maxy) / self.scaleY + 0.5)) - tw_yoff
            if tw_xsize <= 0 or tw_ysize <= 0:
                continue

            assert tw_xoff >= 0
            assert tw_yoff >= 0
            assert sw_xoff >= 0
            assert sw_yoff >= 0

            for bandNr in range(1, self.bands + 1):
                s_band = sourceDS.GetRasterBand(bandNr)
                t_band = resultDS.GetRasterBand(bandNr)
                if self.ct is not None:
                    t_band.SetRasterColorTable(self.ct)
                t_band.SetRasterColorInterpretation(self.ci[bandNr - 1])

                data = s_band.ReadRaster(sw_xoff, sw_yoff, sw_xsize, sw_ysize, tw_xsize, tw_ysize, self.band_type)
                if data is None:
                    print(gdal.GetLastErrorMsg())

                t_band.WriteRaster(tw_xoff, tw_yoff, tw_xsize, tw_ysize, data)

        return resultDS

    def closeDataSet(self, memDS):
        del memDS
        # self.TempDriver.Delete("TEMP")

    def report(self):
        print('Filename: ' + self.filename)
        print('File Size: %dx%dx%d'
              % (self.xsize, self.ysize, self.bands))
        print('Pixel Size: %f x %f'
              % (self.scaleX, self.scaleY))
        print('UL:(%f,%f)   LR:(%f,%f)'
              % (self.ulx, self.uly, self.lrx, self.lry))


def getTileIndexFromFiles(inputTiles, driverTyp):

    if Verbose:
        from sys import version_info
        if version_info >= (3, 0, 0):
            exec('print("Building internal Index for %d tile(s) ..." % len(inputTiles), end=" ")')
        else:
            exec('print "Building internal Index for %d tile(s) ..." % len(inputTiles), ')

    ogrTileIndexDS = createTileIndex("TileIndex", TileIndexFieldName, None, driverTyp)
    for inputTile in inputTiles:

        fhInputTile = gdal.Open(inputTile)
        if fhInputTile is None:
            return None

        dec = AffineTransformDecorator(fhInputTile.GetGeoTransform())
        points = dec.pointsFor(fhInputTile.RasterXSize, fhInputTile.RasterYSize)

        addFeature(ogrTileIndexDS, inputTile, points[0], points[1])
        del fhInputTile

    if Verbose:
        print("finished")
    # ogrTileIndexDS.GetLayer().SyncToDisk()
    return ogrTileIndexDS


def getTargetDir(level=-1):
    if level == -1:
        return TargetDir
    return TargetDir + str(level) + os.sep


def tileImage(minfo, ti):
    """

    Tile image in mosaicinfo minfo  based on tileinfo ti

    returns list of created tiles

    """

    global LastRowIndx
    LastRowIndx = -1
    OGRDS = createTileIndex("TileResult_0", TileIndexFieldName, Source_SRS, TileIndexDriverTyp)

    yRange = list(range(1, ti.countTilesY + 1))
    xRange = list(range(1, ti.countTilesX + 1))

    if not Quiet and not Verbose:
        progress(0.0)
        processed = 0
        total = len(xRange) * len(yRange)

    for yIndex in yRange:
        for xIndex in xRange:
            offsetY = (yIndex - 1) * (ti.tileHeight - ti.overlap)
            offsetX = (xIndex - 1) * (ti.tileWidth - ti.overlap)
            height = ti.tileHeight
            width = ti.tileWidth
            if UseDirForEachRow:
                tilename = getTileName(minfo, ti, xIndex, yIndex, 0)
            else:
                tilename = getTileName(minfo, ti, xIndex, yIndex)

            if offsetX + width > ti.width:
                width = ti.width - offsetX
            if offsetY + height > ti.height:
                height = ti.height - offsetY

            createTile(minfo, offsetX, offsetY, width, height, tilename, OGRDS)

            if not Quiet and not Verbose:
                processed += 1
                progress(processed / float(total))

    if TileIndexName is not None:
        if UseDirForEachRow and not PyramidOnly:
            shapeName = getTargetDir(0) + TileIndexName
        else:
            shapeName = getTargetDir() + TileIndexName
        copyTileIndexToDisk(OGRDS, shapeName)

    if CsvFileName is not None:
        if UseDirForEachRow and not PyramidOnly:
            csvName = getTargetDir(0) + CsvFileName
        else:
            csvName = getTargetDir() + CsvFileName
        copyTileIndexToCSV(OGRDS, csvName)

    return OGRDS


def copyTileIndexToDisk(OGRDS, fileName):
    SHAPEDS = createTileIndex(fileName, TileIndexFieldName, OGRDS.GetLayer().GetSpatialRef(), "ESRI Shapefile")
    OGRDS.GetLayer().ResetReading()
    while True:
        feature = OGRDS.GetLayer().GetNextFeature()
        if feature is None:
            break
        newFeature = feature.Clone()
        basename = os.path.basename(feature.GetField(0))
        if UseDirForEachRow:
            t = os.path.split(os.path.dirname(feature.GetField(0)))
            basename = t[1] + "/" + basename
        newFeature.SetField(0, basename)
        SHAPEDS.GetLayer().CreateFeature(newFeature)
    closeTileIndex(SHAPEDS)


def copyTileIndexToCSV(OGRDS, fileName):
    csvfile = open(fileName, 'w')
    OGRDS.GetLayer().ResetReading()
    while True:
        feature = OGRDS.GetLayer().GetNextFeature()
        if feature is None:
            break
        basename = os.path.basename(feature.GetField(0))
        if UseDirForEachRow:
            t = os.path.split(os.path.dirname(feature.GetField(0)))
            basename = t[1] + "/" + basename
        csvfile.write(basename)
        geom = feature.GetGeometryRef()
        coords = geom.GetEnvelope()

        for coord in coords:
            csvfile.write(CsvDelimiter)
            csvfile.write("%f" % coord)
        csvfile.write("\n")

    csvfile.close()


def createPyramidTile(levelMosaicInfo, offsetX, offsetY, width, height, tileName, OGRDS):

    sx = levelMosaicInfo.scaleX * 2
    sy = levelMosaicInfo.scaleY * 2

    dec = AffineTransformDecorator([levelMosaicInfo.ulx + offsetX * sx, sx, 0,
                                    levelMosaicInfo.uly + offsetY * sy, 0, sy])

    s_fh = levelMosaicInfo.getDataSet(dec.ulx, dec.uly + height * dec.scaleY,
                                      dec.ulx + width * dec.scaleX, dec.uly)
    if s_fh is None:
        return

    if OGRDS is not None:
        points = dec.pointsFor(width, height)
        addFeature(OGRDS, tileName, points[0], points[1])

    if BandType is None:
        bt = levelMosaicInfo.band_type
    else:
        bt = BandType

    geotransform = [dec.ulx, dec.scaleX, 0, dec.uly, 0, dec.scaleY]

    bands = levelMosaicInfo.bands

    if MemDriver is None:
        t_fh = Driver.Create(tileName, width, height, bands, bt, CreateOptions)
    else:
        t_fh = MemDriver.Create(tileName, width, height, bands, bt)

    if t_fh is None:
        print('Creation failed, terminating gdal_tile.')
        sys.exit(1)

    t_fh.SetGeoTransform(geotransform)
    t_fh.SetProjection(levelMosaicInfo.projection)
    for band in range(1, bands + 1):
        t_band = t_fh.GetRasterBand(band)
        if levelMosaicInfo.ct is not None:
            t_band.SetRasterColorTable(levelMosaicInfo.ct)
        t_band.SetRasterColorInterpretation(levelMosaicInfo.ci[band - 1])

    if levelMosaicInfo.nodata is not None:
        for band in range(1, bands + 1):
            t_band = t_fh.GetRasterBand(band)
            t_band.Fill(levelMosaicInfo.nodata)
            t_band.SetNoDataValue(levelMosaicInfo.nodata)

    res = gdal.ReprojectImage(s_fh, t_fh, None, None, ResamplingMethod)
    if res != 0:
        print("Reprojection failed for %s, error %d" % (tileName, res))
        sys.exit(1)

    levelMosaicInfo.closeDataSet(s_fh)

    if MemDriver is not None:
        tt_fh = Driver.CreateCopy(tileName, t_fh, 0, CreateOptions)
        tt_fh.FlushCache()

    if Verbose:
        print(tileName + " : " + str(offsetX) + "|" + str(offsetY) + "-->" + str(width) + "-" + str(height))


def createTile(minfo, offsetX, offsetY, width, height, tilename, OGRDS):
    """

    Create tile
    return name of created tile

    """

    if BandType is None:
        bt = minfo.band_type
    else:
        bt = BandType

    dec = AffineTransformDecorator([minfo.ulx, minfo.scaleX, 0, minfo.uly, 0, minfo.scaleY])

    s_fh = minfo.getDataSet(dec.ulx + offsetX * dec.scaleX, dec.uly + offsetY * dec.scaleY + height * dec.scaleY,
                            dec.ulx + offsetX * dec.scaleX + width * dec.scaleX,
                            dec.uly + offsetY * dec.scaleY)
    if s_fh is None:
        return

    geotransform = [dec.ulx + offsetX * dec.scaleX, dec.scaleX, 0,
                    dec.uly + offsetY * dec.scaleY, 0, dec.scaleY]

    if OGRDS is not None:
        dec2 = AffineTransformDecorator(geotransform)
        points = dec2.pointsFor(width, height)
        addFeature(OGRDS, tilename, points[0], points[1])

    bands = minfo.bands

    if MemDriver is None:
        t_fh = Driver.Create(tilename, width, height, bands, bt, CreateOptions)
    else:
        t_fh = MemDriver.Create(tilename, width, height, bands, bt)

    if t_fh is None:
        print('Creation failed, terminating gdal_tile.')
        sys.exit(1)

    t_fh.SetGeoTransform(geotransform)
    if Source_SRS is not None:
        t_fh.SetProjection(Source_SRS.ExportToWkt())

    readX = min(s_fh.RasterXSize, width)
    readY = min(s_fh.RasterYSize, height)
    for band in range(1, bands + 1):
        s_band = s_fh.GetRasterBand(band)
        t_band = t_fh.GetRasterBand(band)
        if minfo.ct is not None:
            t_band.SetRasterColorTable(minfo.ct)
        if minfo.nodata is not None:
            t_band.Fill(minfo.nodata)
            t_band.SetNoDataValue(minfo.nodata)

        data = s_band.ReadRaster(0, 0, readX, readY, readX, readY, t_band.DataType)
        t_band.WriteRaster(0, 0, readX, readY, data, readX, readY, t_band.DataType)

    minfo.closeDataSet(s_fh)

    if MemDriver is not None:
        tt_fh = Driver.CreateCopy(tilename, t_fh, 0, CreateOptions)
        tt_fh.FlushCache()

    if Verbose:
        print(tilename + " : " + str(offsetX) + "|" + str(offsetY) + "-->" + str(width) + "-" + str(height))


def createTileIndex(dsName, fieldName, srs, driverName):

    OGRDriver = ogr.GetDriverByName(driverName)
    if OGRDriver is None:
        print('ESRI Shapefile driver not found')
        sys.exit(1)

    OGRDataSource = OGRDriver.Open(dsName)
    if OGRDataSource is not None:
        OGRDataSource.Destroy()
        OGRDriver.DeleteDataSource(dsName)
        if Verbose:
            print('truncating index ' + dsName)

    OGRDataSource = OGRDriver.CreateDataSource(dsName)
    if OGRDataSource is None:
        print('Could not open datasource ' + dsName)
        sys.exit(1)

    OGRLayer = OGRDataSource.CreateLayer("index", srs, ogr.wkbPolygon)
    if OGRLayer is None:
        print('Could not create Layer')
        sys.exit(1)

    OGRFieldDefn = ogr.FieldDefn(fieldName, ogr.OFTString)
    if OGRFieldDefn is None:
        print('Could not create FieldDefn for ' + fieldName)
        sys.exit(1)

    OGRFieldDefn.SetWidth(256)
    if OGRLayer.CreateField(OGRFieldDefn) != 0:
        print('Could not create Field for ' + fieldName)
        sys.exit(1)

    return OGRDataSource


def addFeature(OGRDataSource, location, xlist, ylist):

    OGRLayer = OGRDataSource.GetLayer()
    OGRFeature = ogr.Feature(OGRLayer.GetLayerDefn())
    if OGRFeature is None:
        print('Could not create Feature')
        sys.exit(1)

    OGRFeature.SetField(TileIndexFieldName, location)
    wkt = 'POLYGON ((%f %f,%f %f,%f %f,%f %f,%f %f ))' % (xlist[0], ylist[0],
                                                          xlist[1], ylist[1], xlist[2], ylist[2], xlist[3], ylist[3], xlist[0], ylist[0])
    OGRGeometry = ogr.CreateGeometryFromWkt(wkt, OGRLayer.GetSpatialRef())
    if OGRGeometry is None:
        print('Could not create Geometry')
        sys.exit(1)

    OGRFeature.SetGeometryDirectly(OGRGeometry)

    OGRLayer.CreateFeature(OGRFeature)
    OGRFeature.Destroy()


def closeTileIndex(OGRDataSource):
    OGRDataSource.Destroy()


def buildPyramid(minfo, createdTileIndexDS, tileWidth, tileHeight, overlap):

    global LastRowIndx
    inputDS = createdTileIndexDS
    for level in range(1, Levels + 1):
        LastRowIndx = -1
        levelMosaicInfo = mosaic_info(minfo.filename, inputDS)
        levelOutputTileInfo = tile_info(int(levelMosaicInfo.xsize / 2), int(levelMosaicInfo.ysize / 2), tileWidth, tileHeight, overlap)
        inputDS = buildPyramidLevel(levelMosaicInfo, levelOutputTileInfo, level)


def buildPyramidLevel(levelMosaicInfo, levelOutputTileInfo, level):
    yRange = list(range(1, levelOutputTileInfo.countTilesY + 1))
    xRange = list(range(1, levelOutputTileInfo.countTilesX + 1))

    OGRDS = createTileIndex("TileResult_" + str(level), TileIndexFieldName, Source_SRS, TileIndexDriverTyp)

    for yIndex in yRange:
        for xIndex in xRange:
            offsetY = (yIndex - 1) * (levelOutputTileInfo.tileHeight - levelOutputTileInfo.overlap)
            offsetX = (xIndex - 1) * (levelOutputTileInfo.tileWidth - levelOutputTileInfo.overlap)
            height = levelOutputTileInfo.tileHeight
            width = levelOutputTileInfo.tileWidth

            if offsetX + width > levelOutputTileInfo.width:
                width = levelOutputTileInfo.width - offsetX
            if offsetY + height > levelOutputTileInfo.height:
                height = levelOutputTileInfo.height - offsetY

            tilename = getTileName(levelMosaicInfo, levelOutputTileInfo, xIndex, yIndex, level)
            createPyramidTile(levelMosaicInfo, offsetX, offsetY, width, height, tilename, OGRDS)

    if TileIndexName is not None:
        shapeName = getTargetDir(level) + TileIndexName
        copyTileIndexToDisk(OGRDS, shapeName)

    if CsvFileName is not None:
        csvName = getTargetDir(level) + CsvFileName
        copyTileIndexToCSV(OGRDS, csvName)

    return OGRDS


def getTileName(minfo, ti, xIndex, yIndex, level=-1):
    """
    creates the tile file name
    """
    global LastRowIndx

    maxim = ti.countTilesX
    if ti.countTilesY > maxim:
        maxim = ti.countTilesY
    countDigits = len(str(maxim))
    parts = os.path.splitext(os.path.basename(minfo.filename))
    if parts[0][0] == "@":  # remove possible leading "@"
        parts = (parts[0][1:len(parts[0])], parts[1])

    yIndex_str = ("%0" + str(countDigits) + "i") % (yIndex,)
    xIndex_str = ("%0" + str(countDigits) + "i") % (xIndex,)

    if UseDirForEachRow:
        frmt = getTargetDir(level) + str(yIndex) + os.sep + parts[0] + "_" + yIndex_str + "_" + xIndex_str
        # See if there was a switch in the row, if so then create new dir for row.
        if LastRowIndx < yIndex:
            LastRowIndx = yIndex
            if not os.path.exists(getTargetDir(level) + str(yIndex)):
                os.mkdir(getTargetDir(level) + str(yIndex))
    else:
        frmt = getTargetDir(level) + parts[0] + "_" + yIndex_str + "_" + xIndex_str
    # Check for the extension that should be used.
    if Extension is None:
        frmt += parts[1]
    else:
        frmt += "." + Extension
    return frmt


def UsageFormat():
    print('Valid formats:')
    count = gdal.GetDriverCount()
    for index in range(count):
        driver = gdal.GetDriver(index)
        print(driver.ShortName)

# =============================================================================


def Usage():
    print('Usage: gdal_retile.py ')
    print('        [-v] [-q] [-co NAME=VALUE]* [-of out_format]')
    print('        [-ps pixelWidth pixelHeight]')
    print('        [-overlap val_in_pixel]')
    print('        [-ot  {Byte/Int16/UInt16/UInt32/Int32/Float32/Float64/')
    print('               CInt16/CInt32/CFloat32/CFloat64}]')
    print('        [ -tileIndex tileIndexName [-tileIndexField fieldName]]')
    print('        [ -csv fileName [-csvDelim delimiter]]')
    print('        [-s_srs srs_def]  [-pyramidOnly] -levels numberoflevels')
    print('        [-r {near/bilinear/cubic/cubicspline/lanczos}]')
    print('        [-useDirForEachRow]')
    print('        -targetDir TileDirectory input_files')

# =============================================================================


# =============================================================================
#
# Program mainline.
#

def main(args=None):

    global Verbose
    global Quiet
    global CreateOptions
    global Names
    global TileWidth
    global TileHeight
    global Overlap
    global Format
    global BandType
    global Driver
    global Extension
    global MemDriver
    global TileIndexFieldName
    global TileIndexName
    global CsvDelimiter
    global CsvFileName

    global TileIndexDriverTyp
    global Source_SRS
    global TargetDir
    global ResamplingMethod
    global Levels
    global PyramidOnly
    global UseDirForEachRow

    gdal.AllRegister()

    if args is None:
        args = sys.argv
    argv = gdal.GeneralCmdLineProcessor(args)
    if argv is None:
        return 1

    # Parse command line arguments.
    i = 1
    while i < len(argv):
        arg = argv[i]

        if arg == '-of' or arg == '-f':
            i += 1
            Format = argv[i]
        elif arg == '-ot':
            i += 1
            BandType = gdal.GetDataTypeByName(argv[i])
            if BandType == gdal.GDT_Unknown:
                print('Unknown GDAL data type: %s' % argv[i])
                return 1
        elif arg == '-co':
            i += 1
            CreateOptions.append(argv[i])

        elif arg == '-v':
            Verbose = True
        elif arg == '-q':
            Quiet = True

        elif arg == '-targetDir':
            i += 1
            TargetDir = argv[i]

            if not os.path.exists(TargetDir):
                print("TargetDir " + TargetDir + " does not exist")
                return 1
            if TargetDir[len(TargetDir) - 1:] != os.sep:
                TargetDir = TargetDir + os.sep

        elif arg == '-ps':
            i += 1
            TileWidth = int(argv[i])
            i += 1
            TileHeight = int(argv[i])

        elif arg == '-overlap':
            i += 1
            Overlap = int(argv[i])

        elif arg == '-r':
            i += 1
            ResamplingMethodString = argv[i]
            if ResamplingMethodString == "near":
                ResamplingMethod = gdal.GRA_NearestNeighbour
            elif ResamplingMethodString == "bilinear":
                ResamplingMethod = gdal.GRA_Bilinear
            elif ResamplingMethodString == "cubic":
                ResamplingMethod = gdal.GRA_Cubic
            elif ResamplingMethodString == "cubicspline":
                ResamplingMethod = gdal.GRA_CubicSpline
            elif ResamplingMethodString == "lanczos":
                ResamplingMethod = gdal.GRA_Lanczos
            else:
                print("Unknown resampling method: %s" % ResamplingMethodString)
                return 1
        elif arg == '-levels':
            i += 1
            Levels = int(argv[i])
            if Levels < 1:
                print("Invalid number of levels : %d" % Levels)
                return 1
        elif arg == '-s_srs':
            i += 1
            Source_SRS = osr.SpatialReference()
            if Source_SRS.SetFromUserInput(argv[i]) != 0:
                print('invalid -s_srs: ' + argv[i])
                return 1

        elif arg == "-pyramidOnly":
            PyramidOnly = True
        elif arg == '-tileIndex':
            i += 1
            TileIndexName = argv[i]
            parts = os.path.splitext(TileIndexName)
            if not parts[1]:
                TileIndexName += ".shp"

        elif arg == '-tileIndexField':
            i += 1
            TileIndexFieldName = argv[i]
        elif arg == '-csv':
            i += 1
            CsvFileName = argv[i]
            parts = os.path.splitext(CsvFileName)
            if not parts[1]:
                CsvFileName += ".csv"
        elif arg == '-csvDelim':
            i += 1
            CsvDelimiter = argv[i]
        elif arg == '-useDirForEachRow':
            UseDirForEachRow = True
        elif arg[:1] == '-':
            print('Unrecognized command option: %s' % arg)
            Usage()
            return 1

        else:
            Names.append(arg)
        i += 1

    if not Names:
        print('No input files selected.')
        Usage()
        return 1

    if (TileWidth == 0 or TileHeight == 0):
        print("Invalid tile dimension %d,%d" % (TileWidth, TileHeight))
        return 1
    if (TileWidth - Overlap <= 0 or TileHeight - Overlap <= 0):
        print("Overlap too big w.r.t tile height/width")
        return 1

    if TargetDir is None:
        print("Missing Directory for Tiles -targetDir")
        Usage()
        return 1

    # create level 0 directory if needed
    if UseDirForEachRow and not PyramidOnly:
        leveldir = TargetDir + str(0) + os.sep
        if not os.path.exists(leveldir):
            os.mkdir(leveldir)

    if Levels > 0:  # prepare Dirs for pyramid
        startIndx = 1
        for levelIndx in range(startIndx, Levels + 1):
            leveldir = TargetDir + str(levelIndx) + os.sep
            if os.path.exists(leveldir):
                continue
            os.mkdir(leveldir)
            if not os.path.exists(leveldir):
                print("Cannot create level dir: %s" % leveldir)
                return 1
            if Verbose:
                print("Created level dir: %s" % leveldir)

    Driver = gdal.GetDriverByName(Format)
    if Driver is None:
        print('Format driver %s not found, pick a supported driver.' % Format)
        UsageFormat()
        return 1

    DriverMD = Driver.GetMetadata()
    Extension = DriverMD.get(gdal.DMD_EXTENSION)
    if 'DCAP_CREATE' not in DriverMD:
        MemDriver = gdal.GetDriverByName("MEM")

    tileIndexDS = getTileIndexFromFiles(Names, TileIndexDriverTyp)
    if tileIndexDS is None:
        print("Error building tile index")
        return 1
    minfo = mosaic_info(Names[0], tileIndexDS)
    ti = tile_info(minfo.xsize, minfo.ysize, TileWidth, TileHeight, Overlap)

    if Source_SRS is None and minfo.projection:
        Source_SRS = osr.SpatialReference()
        if Source_SRS.SetFromUserInput(minfo.projection) != 0:
            print('invalid projection  ' + minfo.projection)
            return 1

    if Verbose:
        minfo.report()
        ti.report()

    if not PyramidOnly:
        dsCreatedTileIndex = tileImage(minfo, ti)
        tileIndexDS.Destroy()
    else:
        dsCreatedTileIndex = tileIndexDS

    if Levels > 0:
        buildPyramid(minfo, dsCreatedTileIndex, TileWidth, TileHeight, Overlap)

    if Verbose:
        print("FINISHED")
    return 0


def initGlobals():
    """ Only used for unit tests """
    global Verbose
    global CreateOptions
    global Names
    global TileWidth
    global TileHeight
    global Overlap
    global Format
    global BandType
    global Driver
    global Extension
    global MemDriver
    global TileIndexFieldName
    global TileIndexName
    global TileIndexDriverTyp
    global CsvDelimiter
    global CsvFileName
    global Source_SRS
    global TargetDir
    global ResamplingMethod
    global Levels
    global PyramidOnly
    global LastRowIndx
    global UseDirForEachRow

    Verbose = False
    CreateOptions = []
    Names = []
    TileWidth = 256
    TileHeight = 256
    Overlap = 0
    Format = 'GTiff'
    BandType = None
    Driver = None
    Extension = None
    MemDriver = None
    TileIndexFieldName = 'location'
    TileIndexName = None
    TileIndexDriverTyp = "Memory"
    CsvDelimiter = ";"
    CsvFileName = None

    Source_SRS = None
    TargetDir = None
    ResamplingMethod = gdal.GRA_NearestNeighbour
    Levels = 0
    PyramidOnly = False
    LastRowIndx = -1
    UseDirForEachRow = False


# global vars
Verbose = False
Quiet = False
CreateOptions = []
Names = []
TileWidth = 256
TileHeight = 256
Overlap = 0
Format = 'GTiff'
BandType = None
Driver = None
Extension = None
MemDriver = None
TileIndexFieldName = 'location'
TileIndexName = None
TileIndexDriverTyp = "Memory"
CsvDelimiter = ";"
CsvFileName = None
Source_SRS = None
TargetDir = None
ResamplingMethod = gdal.GRA_NearestNeighbour
Levels = 0
PyramidOnly = False
LastRowIndx = -1
UseDirForEachRow = False


if __name__ == '__main__':
    sys.exit(main(sys.argv))