<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;">Olás,<br>prosseguindo na tentativa de encontrar biomassa através de indices de vegetação (parece que pela banda L de um radar tb. funciona) me deparei com um problema no qgis.<br><br><br>Quando faço uma operação para conseguir a radiancia me deparo com uma imagem completamente cinza, na mesma tonalidade, mas com valores diferentes.<br>parece que deu certo o calculo, mas não me mostra isso.<br>O calculo é com a banda 1 de um landsat, já com a correção do pixel escuro.<br><br>Os valores variam de 1 a 221. Tem um valor 0 com muitos pixels que não o retirei...será que o erro é esse?<br>Bom , em sintese:<br>vlr do pixel * ((221-1)/255) +1<br><br>É possível ver a imagem?<br>Envio o histograma abaixo caso seja relevante.<br>Forte abraço,<br>Koblitz<br>0 16943384 16943384 31.4993
31.4993<br> 1 867 16944251 0.0016 31.5009<br> 2 2516 16946767 0.0047 31.5056<br> 3 3617 16950384 0.0067 31.5123<br> 4 6052 16956436 0.0113 31.5236<br> 5 10187 16966623
0.0189 31.5425<br> 6 17974 16984597 0.0334 31.5759<br> 7 26828 17011425 0.0499 31.6258<br> 8 49319 17060744 0.0917 31.7175<br> 9 185391 17246135 0.3447 32.0621<br> 10 943339 18189474 1.7538
33.8159<br> 11 2756489 20945963 5.1246 38.9404<br> 12 4138228 25084191 7.6933 46.6338<br> 13 4842614 29926805 9.0029 55.6366<br> 14 5253628 35180433 9.7670 65.4036<br> 15 4115192 39295625 7.6505
73.0541<br> 16 2828501 42124126 5.2584 78.3126<br> 17 1869706 43993832 3.4760 81.7885<br> 18 1427264 45421096 2.6534 84.4419<br> 19 1131704 46552800 2.1039 86.5459<br> 20 800871 47353671 1.4889
88.0348<br> 21 671877 48025548 1.2491 89.2839<br> 22 706948 48732496 1.3143 90.5981<br> 23 696767 49429263 1.2954 91.8935<br> 24 588517 50017780 1.0941 92.9876<br> 25 453169 50470949 0.8425
93.8301<br> 26 392648 50863597 0.7300 94.5600<br> 27 415933 51279530 0.7733 95.3333<br> 28 419207 51698737 0.7793 96.1126<br> 29 329698 52028435 0.6129 96.7256<br> 30 243975 52272410 0.4536
97.1792<br> 31 211479 52483889 0.3932 97.5723<br> 32 161706 52645595 0.3006 97.8729<br> 33 115203 52760798 0.2142 98.0871<br> 34 97761 52858559 0.1817 98.2689<br> 35 87669 52946228 0.1630
98.4318<br> 36 77975 53024203 0.1450 98.5768<br> 37 65325 53089528 0.1214 98.6982<br> 38 54669 53144197 0.1016 98.7999<br> 39 52033 53196230 0.0967 98.8966<br> 40 48282 53244512 0.0898
98.9864<br> 41 40643 53285155 0.0756 99.0619<br> 42 33829 53318984 0.0629 99.1248<br> 43 31915 53350899 0.0593 99.1842<br> 44 32058 53382957 0.0596 99.2438<br> 45 31779 53414736 0.0591
99.3028<br> 46 27627 53442363 0.0514 99.3542<br> 47 24627 53466990 0.0458 99.4000<br> 48 23795 53490785 0.0442 99.4442<br> 49 21755 53512540 0.0404 99.4847<br> 50 18832 53531372 0.0350
99.5197<br> 51 15945 53547317 0.0296 99.5493<br> 52 15585 53562902 0.0290 99.5783<br> 53 15589 53578491 0.0290 99.6073<br> 54 14899 53593390 0.0277 99.6350<br> 55 12768 53606158 0.0237
99.6587<br> 56 12561 53618719 0.0234 99.6821<br> 57 12081 53630800 0.0225 99.7045<br> 58 11053 53641853 0.0205 99.7251<br> 59 9717 53651570 0.0181 99.7431<br> 60 8650 53660220 0.0161
99.7592<br> 61 8732 53668952 0.0162 99.7755<br> 62 8811 53677763 0.0164 99.7918<br> 63 8218 53685981 0.0153 99.8071<br> 64 7321 53693302 0.0136 99.8207<br> 65 6481 53699783 0.0120
99.8328<br> 66 5977 53705760 0.0111 99.8439<br> 67 5106 53710866 0.0095 99.8534<br> 68 4497 53715363 0.0084 99.8617<br> 69 4148 53719511 0.0077 99.8694<br> 70 4019 53723530 0.0075
99.8769<br> 71 3614 53727144 0.0067 99.8836<br> 72 3399 53730543 0.0063 99.8900<br> 73 3170 53733713 0.0059 99.8958<br> 74 3083 53736796 0.0057 99.9016<br> 75 2863 53739659 0.0053
99.9069<br> 76 2512 53742171 0.0047 99.9116<br> 77 2223 53744394 0.0041 99.9157<br> 78 2121 53746515 0.0039 99.9196<br> 79 2190 53748705 0.0041 99.9237<br> 80 2070 53750775 0.0038
99.9276<br> 81 1909 53752684 0.0035 99.9311<br> 82 1713 53754397 0.0032 99.9343<br> 83 1670 53756067 0.0031 99.9374<br> 84 1595 53757662 0.0030 99.9404<br> 85 1412 53759074 0.0026
99.9430<br> 86 1337 53760411 0.0025 99.9455<br> 87 1308 53761719 0.0024 99.9479<br> 88 1307 53763026 0.0024 99.9503<br> 89 1232 53764258 0.0023 99.9526<br> 90 1127 53765385 0.0021
99.9547<br> 91 1223 53766608 0.0023 99.9570<br> 92 1181 53767789 0.0022 99.9592<br> 93 1123 53768912 0.0021 99.9613<br> 94 1080 53769992 0.0020 99.9633<br> 95 965 53770957 0.0018
99.9651<br> 96 961 53771918 0.0018 99.9669<br> 97 1016 53772934 0.0019 99.9688<br> 98 967 53773901 0.0018 99.9706<br> 99 854 53774755 0.0016 99.9721<br> 100 785 53775540
0.0015 99.9736<br> 101 778 53776318 0.0014 99.9751<br> 102 707 53777025 0.0013 99.9764<br> 103 634 53777659 0.0012 99.9775<br> 104 613 53778272 0.0011 99.9787<br> 105 622 53778894
0.0012 99.9798<br> 106 609 53779503 0.0011 99.9810<br> 107 565 53780068 0.0011 99.9820<br> 108 566 53780634 0.0011 99.9831<br> 109 533 53781167 0.0010 99.9841<br> 110 429 53781596
0.0008 99.9849<br> 111 408 53782004 0.0008 99.9856<br> 112 399 53782403 0.0007 99.9864<br> 113 328 53782731 0.0006 99.9870<br> 114 335 53783066 0.0006 99.9876<br> 115 275 53783341
0.0005 99.9881<br> 116 243 53783584 0.0005 99.9886<br> 117 231 53783815 0.0004 99.9890<br> 118 206 53784021 0.0004 99.9894<br> 119 200 53784221 0.0004 99.9897<br> 120 161 53784382
0.0003 99.9900<br> 121 179 53784561 0.0003 99.9904<br> 122 157 53784718 0.0003 99.9907<br> 123 165 53784883 0.0003 99.9910<br> 124 164 53785047 0.0003 99.9913<br> 125 164 53785211
0.0003 99.9916<br> 126 158 53785369 0.0003 99.9919<br> 127 148 53785517 0.0003 99.9922<br> 128 160 53785677 0.0003 99.9925<br> 129 146 53785823 0.0003 99.9927<br> 130 132 53785955
0.0002 99.9930<br> 131 156 53786111 0.0003 99.9933<br> 132 138 53786249 0.0003 99.9935<br> 133 127 53786376 0.0002 99.9938<br> 134 127 53786503 0.0002 99.9940<br> 135 127 53786630
0.0002 99.9942<br> 136 107 53786737 0.0002 99.9944<br> 137 82 53786819 0.0002 99.9946<br> 138 98 53786917 0.0002 99.9948<br> 139 94 53787011 0.0002 99.9949<br> 140 94
53787105 0.0002 99.9951<br> 141 107 53787212 0.0002 99.9953<br> 142 106 53787318 0.0002 99.9955<br> 143 86 53787404 0.0002 99.9957<br> 144 100 53787504 0.0002 99.9959<br> 145
96 53787600 0.0002 99.9960<br> 146 89 53787689 0.0002 99.9962<br> 147 98 53787787 0.0002 99.9964<br> 148 76 53787863 0.0001 99.9965<br> 149 87 53787950 0.0002 99.9967<br>
150 76 53788026 0.0001 99.9968<br> 151 69 53788095 0.0001 99.9969<br> 152 71 53788166 0.0001 99.9971<br> 153 44 53788210 0.0001 99.9972<br> 154 58 53788268 0.0001
99.9973<br> 155 70 53788338 0.0001 99.9974<br> 156 64 53788402 0.0001 99.9975<br> 157 54 53788456 0.0001 99.9976<br> 158 40 53788496 0.0001 99.9977<br> 159 31 53788527
0.0001 99.9978<br> 160 29 53788556 0.0001 99.9978<br> 161 26 53788582 0.0000 99.9979<br> 162 40 53788622 0.0001 99.9979<br> 163 36 53788658 0.0001 99.9980<br> 164 33
53788691 0.0001 99.9981<br> 165 37 53788728 0.0001 99.9981<br> 166 32 53788760 0.0001 99.9982<br> 167 32 53788792 0.0001 99.9982<br> 168 30 53788822 0.0001 99.9983<br>
169 28 53788850 0.0001 99.9984<br> 170 34 53788884 0.0001 99.9984<br> 171 25 53788909 0.0000 99.9985<br> 172 24 53788933 0.0000 99.9985<br> 173 27 53788960 0.0001
99.9986<br> 174 25 53788985 0.0000 99.9986<br> 175 29 53789014 0.0001 99.9987<br> 176 20 53789034 0.0000 99.9987<br> 177 22 53789056 0.0000 99.9987<br> 178 23 53789079
0.0000 99.9988<br> 179 26 53789105 0.0000 99.9988<br> 180 31 53789136 0.0001 99.9989<br> 181 18 53789154 0.0000 99.9989<br> 182 25 53789179 0.0000 99.9990<br> 183 29
53789208 0.0001 99.9990<br> 184 20 53789228 0.0000 99.9991<br> 185 23 53789251 0.0000 99.9991<br> 186 23 53789274 0.0000 99.9991<br> 187 18 53789292 0.0000 99.9992<br>
188 24 53789316 0.0000 99.9992<br> 189 23 53789339 0.0000 99.9993<br> 190 15 53789354 0.0000 99.9993<br> 191 16 53789370 0.0000 99.9993<br> 192 21 53789391 0.0000
99.9994<br> 193 20 53789411 0.0000 99.9994<br> 194 18 53789429 0.0000 99.9994<br> 195 21 53789450 0.0000 99.9995<br> 196 21 53789471 0.0000 99.9995<br> 197 22 53789493
0.0000 99.9995<br> 198 14 53789507 0.0000 99.9996<br> 199 20 53789527 0.0000 99.9996<br> 200 18 53789545 0.0000 99.9996<br> 201 19 53789564 0.0000 99.9997<br> 202 13
53789577 0.0000 99.9997<br> 203 10 53789587 0.0000 99.9997<br> 204 11 53789598 0.0000 99.9997<br> 205 5 53789603 0.0000 99.9998<br> 206 15 53789618 0.0000 99.9998<br>
207 4 53789622 0.0000 99.9998<br> 208 11 53789633 0.0000 99.9998<br> 209 7 53789640 0.0000 99.9998<br> 210 6 53789646 0.0000 99.9998<br> 211 6 53789652 0.0000
99.9998<br> 212 6 53789658 0.0000 99.9999<br> 213 8 53789666 0.0000 99.9999<br> 214 3 53789669 0.0000 99.9999<br> 215 4 53789673 0.0000 99.9999<br> 216 13
53789686 0.0000 99.9999<br> 217 4 53789690 0.0000 99.9999<br> 218 6 53789696 0.0000 99.9999<br> 219 6 53789702 0.0000 99.9999<br> 220 8 53789710 0.0000 100.0000<br>
221 26 53789736 0.0000 100.0000<br><br><br></td></tr></table>