Buongiorno a tutti,<div><br></div><div>devo effettuare una unsupervised classification di una geotiff. La <b>gdalinfo </b>mi fornisce queste info:</div><div><div><b>Size is 7480, 5680</b></div><div><b>Coordinate System is:</b></div>
<div><b>PROJCS["Roma_1940_Gauss_Boaga_Ovest",</b></div><div><b> GEOGCS["GCS_Roma_1940",</b></div><div><b> DATUM["Roma_1940",</b></div><div><b> SPHEROID["International_1924",6378388.0,297.0]],</b></div>
<div><b> PRIMEM["Greenwich",0.0],</b></div><div><b> UNIT["Degree",0.0174532925199433]],</b></div><div><b> PROJECTION["Transverse_Mercator"],</b></div><div><b> PARAMETER["False_Easting",1500000.0],</b></div>
<div><b> PARAMETER["False_Northing",0.0],</b></div><div><b> PARAMETER["Central_Meridian",9.0],</b></div><div><b> PARAMETER["Scale_Factor",0.9996],</b></div><div><b> PARAMETER["Latitude_Of_Origin",0.0],</b></div>
<div><b> UNIT["Meter",1.0]]</b></div><div><b>Origin = (2512520.000000000000000,4150280.000000000000000)</b></div><div><b>Pixel Size = (1.000000000000000,-1.000000000000000)</b></div><div><b>Metadata:</b></div>
<div><b> TIFFTAG_XRESOLUTION=71</b></div><div><b> TIFFTAG_YRESOLUTION=182</b></div><div><b> TIFFTAG_RESOLUTIONUNIT=1 (unitless)</b></div><div><b>Image Structure Metadata:</b></div><div><b> INTERLEAVE=PIXEL</b></div><div>
<b>Corner Coordinates:</b></div><div><b>Upper Left ( 2512520.000, 4150280.000) ( 20d21' 5.14"E, 36d57' 4.44"N)</b></div><div><b>Lower Left ( 2512520.000, 4144600.000) ( 20d20'38.00"E, 36d54' 3.73"N)</b></div>
<div><b>Upper Right ( 2520000.000, 4150280.000) ( 20d26' 1.59"E, 36d56'35.62"N)</b></div><div><b>Lower Right ( 2520000.000, 4144600.000) ( 20d25'34.26"E, 36d53'34.96"N)</b></div><div><b>Center ( 2516260.000, 4147440.000) ( 20d23'19.75"E, 36d55'19.72"N)</b></div>
<div><b>Band 1 Block=7480x1 Type=Byte, ColorInterp=Red</b></div><div><b> Overviews: 1496x1136</b></div><div><b> Metadata:</b></div><div><b> LAYER_TYPE=athematic</b></div><div><b>Band 2 Block=7480x1 Type=Byte, ColorInterp=Green</b></div>
<div><b> Overviews: 1496x1136</b></div><div><b> Metadata:</b></div><div><b> LAYER_TYPE=athematic</b></div><div><b>Band 3 Block=7480x1 Type=Byte, ColorInterp=Blue</b></div><div><b> Overviews: 1496x1136</b></div><div>
<b> Metadata:</b></div><div><b> LAYER_TYPE=athematic</b></div><div><b>Warning 1: TIFFReadDirectory:Unknown field with tag 33919 (0x847f) encountered</b></div><div><br></div><div>Ho effettuato le seguenti operazioni:</div>
<div> - r.in.gdal</div><div> - i.group</div><div> - i.cluster</div><div><br></div><b>i.cluster group=gruppo subgroup=sottogruppo sigfile=sign classes=5 iterations=30 convergence=98.0 separation=0.0 min_size=17</b></div>
<div>mi dą il seguente errore:</div><div><div><b>ERRORE: Not enough sample points. Please run again and choose a larger sample size.</b></div><div>Ho impostato dunque il parametro <i>sample </i>ma qualunque valore io metta(a parte 1,1) mi viene dato il seguente errore:</div>
<div><b>ERRORE: Illegal value(s) of sample intervals</b></div><div><br></div><div>Che volere devo impostare?Come faccio a scegliere un intervallo di campionamento?</div><div><br></div><div>grazie per la disponibilitą</div>
-- <br>Pietro Arena <br>
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