GRASS下影像镶嵌.pdf

I think the image you send should be made as below. The image you get is not mosaic at file level but only at image level. I think what you want is at file level. If you want do this you can do it in GRASS. I will show how to do this using the image above . I use landsat image p143r40 and p143r39. First, you use r.in;gdal to make the file in GRASS. The two image should be in different location, because they are not in the same projection. 1),use r.in.gdal input the landsat image. The two image should be in different location, because they are not in the same projection. p143r39 in testa location , p143r40 in testb location. 2).all above can be down in QGIS, Qgis contain the grass tool. Then you create a location with latitude and longitude. Set the projection to be WGS84. The I create a new location and a new mapset. Then you enter the location you just created.(latlon projection) then you can use j to change the image to the image from UTM to latlon. Below show the band we project from UTM to latlon.. then you should composite the gray band to RGB. Use the command below posite red=p143r40r green=p143r40g blue=p143r40b output=p143r40 –o posite red=p143r39r green=p143r39g blue=p143r39b output=p143r39 –o thus,we combine gray band to rgb color, allways use TM band5 as Red ,band 4 as Green,band 3 as Blue. Last you can use r.patch to mosaic r.patch -z input=p143r39,p143r40 output=imagepatch --overwrite then you get the image that mosaic. But the image are in Grass format. You need to change it to some familiar format such as Geotiff, ENVI hdr file. r.out.gdal input=imagepatch output=c:\pathch.tif format=GTiff then do all the thing..... by the way, you translate coordinate you can use gdal bins. You can download from /gdal/wiki/DownloadSource you can use with the course at : /gdalwarp.html then you can import them to grass and do patch.