Are you sure that your projection string is correct?
"+proj=tmerc +lat_0=0 +lon_0=173 +k=0.9996 +x_0=1600000 +y_0=10000000 +ellps=GRS80 +units=m +no_defs"
And cross check your reference point's coordinates. Easy to swap northing and easting by chance.
Gesendet: Samstag, 22. Juni 2019 um 08:11 Uhr
Von: "John Groombridge" <[email protected]>
An: qlandkartegt-users <[email protected]>
Betreff: [Qlandkartegt-users] gdal and gdalwarp errors
Von: "John Groombridge" <[email protected]>
An: qlandkartegt-users <[email protected]>
Betreff: [Qlandkartegt-users] gdal and gdalwarp errors
I am attempting to georeference a 4961 x 3508 pixel 100dpi tif image using QlandkarteGT. The process appears to run normally, but produces an image that is 133 x 6075 pixels. This appears to be during the gdalwarp process. The same thing happens if I use Qgis, or use command line. It happens using Linux Mint 17.3 and 18.x
Here is the QlandkarkeGT output:
gdal_translate -a_srs +proj=tmerc +lat_0=0 +lon_0=173 +k=0.9996 +x_0=1600000 +y_0=10000000 +ellps=GRS80 +units=m +no_defs -gcp 469 1881 1767200.375000 5443069.000000 -gcp 3792 983 1767476.750000 5443148.000000 -gcp 2282 2365 1765643.125000 5369012.000000 Mapimage.tif /tmp/qt_temp.sa4306
Input file size is 4961, 3508
0...10...20...30...40...50...60...70...80...90...100 - done.
gdalwarp -order 1 -r cubic -dstnodata "255" /tmp/qt_temp.sa4306 /tmp/qt_temp.LB4306
Creating output file that is 133P x 6075L.
Processing input file /tmp/qt_temp.sa4306.
0...10...20...30...40...50...60...70...80...90...100 - done.
gdal_translate -co tiled=yes -co blockxsize=256 -co blockysize=256 -co compress=deflate /tmp/qt_temp.LB4306 Mapimage_ref.tif
Input file size is 133, 6075
0...10...20...30...40...50...60...70...80...90...100 - done.
gdaladdo -r cubic --config COMPRESS_OVERVIEW JPEG Mapimage_ref.tif 2
0...10...20...30...40...50...60...70...80...90...100 - done.
--- finished ---
I have tried different images, including jpg with the same result. Previously (months ago) this was no problem.
JohnG
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