到目前为止,我找不到在TIFF文件中更改GeoTiff-TAG的方法。我的操作系统是Linux Lubuntu 18.04,我使用的是Python3.x。只是EXIF-TAG可以通过各种方法进行更改。
对于读写EXIF标签,我可以使用例如:
尤其是python模块似乎对GeoTiff-Tag视而不见,即它们仅读取(和写入)EXIF-TAG,而不能读取(或写入)EXIF-TAG。使用exiftool,我至少可以读取和打印GeoTiff-TAG以及其他标签。例如,通过我的TIFF文件的exiftool进行的控制台输出,其中还包括GeoTiff-Tag,将是:
输入:
exiftool -D -G -a -u -U -f "newfile.tif"
输出:
[ExifTool] - ExifTool Version Number : 10.80
[File] - File Name : newfile.tif
[File] - Directory : .
[File] - File Size : 1503 kB
[File] - File Modification Date/Time : 2019:12:19 17:32:17+01:00
[File] - File Access Date/Time : 2019:12:19 17:32:17+01:00
[File] - File Inode Change Date/Time : 2019:12:19 17:32:17+01:00
[File] - File Permissions : rw-rw-r--
[File] - File Type : TIFF
[File] - File Type Extension : tif
[File] - MIME Type : image/tiff
[File] - Exif Byte Order : Little-endian (Intel, II)
[File] - Current IPTC Digest : 79ffcf282ca6974ff99640a7421b40b7
[EXIF] 256 Image Width : 1148
[EXIF] 257 Image Height : 1337
[EXIF] 258 Bits Per Sample : 8
[EXIF] 259 Compression : Uncompressed
[EXIF] 262 Photometric Interpretation : RGB Palette
[EXIF] 273 Strip Offsets : (Binary data 1390 bytes, use -b option to extract)
[EXIF] 274 Orientation : Horizontal (normal)
[EXIF] 277 Samples Per Pixel : 1
[EXIF] 278 Rows Per Strip : 7
[EXIF] 279 Strip Byte Counts : (Binary data 954 bytes, use -b option to extract)
[EXIF] 282 X Resolution : 1
[EXIF] 283 Y Resolution : 1
[EXIF] 284 Planar Configuration : Chunky
[EXIF] 296 Resolution Unit : None
[EXIF] 305 Software : IMAGINE TIFF Support.Copyright 1991 - 1999 by ERDAS, Inc. All Rights Reserved.@(#)$RCSfile: etif.c $ $Revision: 1.11 $ $Date$
[EXIF] 320 Color Map : (Binary data 1536 bytes, use -b option to extract)
[EXIF] 339 Sample Format : Unsigned
[EXIF] 33550 Pixel Scale : 30 30 0
[EXIF] 33922 Model Tie Point : 0 0 0 1514925 1583985 0
[IPTC] 25 Keywords : word
[IPTC] 0 Application Record Version : 4
[GeoTiff] 1 Geo Tiff Version : 1.1.0
[GeoTiff] 1024 GT Model Type : Projected
[GeoTiff] 1025 GT Raster Type : Pixel Is Area
[GeoTiff] 1026 GT Citation : IMAGINE GeoTIFF Support.Copyright 1991 - 2001 by ERDAS, Inc. All Rights Reserved.@(#)$RCSfile: egtf.c $ $Revision: 1.11.2.3 $ $Date: 2004/11/24 09:12:56EST $.Projection Name = USA_Contiguous_Albers_Equal_Area_Conic_USGS_version.Units = meters.GeoTIFF Units = meters
[GeoTiff] 2048 Geographic Type : NAD83
[GeoTiff] 3072 Projected CS Type : User Defined
[GeoTiff] 3073 PCS Citation : IMAGINE GeoTIFF Support.Copyright 1991 - 2001 by ERDAS, Inc. All Rights Reserved.@(#)$RCSfile: egtf.c $ $Revision: 1.11.2.3 $ $Date: 2004/11/24 09:12:56EST $.Projection = Albers Conical Equal Area
[GeoTiff] 3074 Projection : User Defined
[GeoTiff] 3075 Proj Coord Trans : Albers Equal Area
[GeoTiff] 3076 Proj Linear Units : Linear Meter
[GeoTiff] 3078 Proj Std Parallel 1 : 29.5
[GeoTiff] 3079 Proj Std Parallel 2 : 45.5
[GeoTiff] 3081 Proj Nat Origin Lat : 23
[GeoTiff] 3082 Proj False Easting : 0
[GeoTiff] 3083 Proj False Northing : 0
[GeoTiff] 3088 Proj Center Long : -96
[Composite] - Image Size : 1148x1337
[Composite] - Megapixels : 1.5
然后,我尝试更改/删除例如GeoTiff-TAG“投影”,它会在不进行任何更改的情况下引发以下警告消息:输入:
exiftool "-Projection=" "newfile.tif"
输出:
Warning: Sorry, Projection is not writable. Nothing to do.
在互联网上搜索时,我发现了其他库和程序包,它们也许可以帮到我,但是到目前为止没有用,因为我没有找到文档,或者它没有用:
至于后一种方法gdal_edit和gdal_translate,我尝试了以下操作,但没有任何效果(即使没有任何错误消息):
gdal_edit.py -mo "3075=Custom" "newfile.tif"
gdal_edit.py -mo "ProjCoordTrans=Custom" "newfile.tif"
gdal_translate -mo "3075=Custom" "newfile.tif" "newfile_2.tif"
gdal_translate -mo "ProjCoordTrans=Custom" "newfile.tif" "newfile_2.tif"
如您所见,在示例中,我尝试将名为“ ProjCoordTrans”的GeoTIFF-Tag号3075修改为Costum字符串。当执行这4个命令中的任何一个时,都不会引发任何错误,而是通过[]之后检查TIFF-Tags
exiftool -D -G -a -u -U -f -s "newfile.tif"
我发现相同的TAG仍然保持不变。
我想知道是否有可能更改GeoTiff标签。一定有可能。
到目前为止,我找不到在TIFF文件中更改GeoTiff-TAG的方法。我的操作系统是Linux Lubuntu 18.04,我使用的是Python3.x。只是EXIF-TAG可以通过各种方法进行更改。对于两个...
我在exiftool本身的项目页面上找到了answer。此后,我将总结在页面作者Phil Harvey的帮助下发现的内容。