Hi Ede, The correct place can be derived from the TFW file:
10 pixel size west-east 0 rotation factor 0 rotation factor -10 pixel size north-south (smaller coordinates to the south) 1005 x of the centre of top-left pixel 995 y of the centre of top-left pixel For a fast visual check I put two point to OJ vector layer: POINT (1005 995) POINT (1000 1000) => the corner or the corner pixel should be at here The first point is at the origin of the TFW file - middle point of top-left pixel The latter is the top-left corner of top-left pixel - half a pixel to the west so -5 to x - half a pixel to the north so +5 to y Results from colors.tif + colors.tfw and colors_geo.tif tif+tfw ====== - ReferencedImage half a pixel shift - BufferedImage right location, weird colours - GeoTIFF plus half a pixel shift - Sextante all right GeoTIFF ====== - ReferencedImage all right - BufferedImage corner at coordinates (0,0), weird colours - GeoTIFF plus claims that GeoTIFF is not a GeoTIFF - Sextante all right The GeoTIFF is a valid GeoTIFF as far as I know. It is created with GDAL. Regards, -Jukka- edgar.soldin wrote: > > no rush > > current TIFF readers are > - ReferencedImage > - BufferedImage > - GeoTIFF plus > and > - Sextante > > please advise on the shift when you do. whether to substract or add half a > pixel. > how do you actually compare? > > ..ede > > On 25.11.2014 11:37, Rahkonen Jukka (Tike) wrote: > > Not today, need to rush now. Later, for sure. I will still test both > > tif.tfw and > geotiff where it is supported. > > > > -Jukka- > > > >> -----Alkuperäinen viesti----- > >> Lähettäjä: edgar.sol...@web.de [mailto:edgar.sol...@web.de] > >> Lähetetty: 25. marraskuuta 2014 12:24 > >> Vastaanottaja: OpenJump develop and use > >> Aihe: Re: [JPP-Devel] Half a pixel shift in images again > >> > >> hmm, let's stick with one format, TIFF or PNG. > >> > >> can you please open that then in every reader offered and write down > >> the result in the form of > >> > >> reader name - result > >> > >> ? > >> > >> thanks.. ede > >> > >> On 25.11.2014 11:13, Rahkonen Jukka (Tike) wrote: > >>> It seems that OpenJUMP is opening once again images so that they are > >>> half a > >> pixel shifted from the correct location. I thought that this issue > >> was fixed when Ede was adding masses of new image readers. > >>> > >>> Good news is that OpenJUMP seems to open images always to the same > >>> place > >> with different readers and from image+world file or from GeoTIFF. > >>> > >>> Attachments: > >>> > >>> OJ_TFW_error.png shows the current and the right location of the > >>> top-left corner color.png + .pgw test image as png (10 by 10 pixels, > >>> 10 m pixel size) color.tif + .tfw test image as plain tiff (10 by 10 > >>> pixels, 10 m pixel size) color_geo.tif test image as GeoTIFF > >>> > >>> -Jukka Rahkonen- > >>> > >>> > >>> > >>> -------------------------------------------------------------------- > >>> -- > >>> -------- Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT > >>> Server from Actuate! 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