PSU GEOG 482 - Unsupervised Classification Activity

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Unsupervised Classification ActivityIn this activity you will simulate an unsupervised classification ofremotely sensed image data to create a land cover map.1. Plot the reflectance values.The two grids on the top of the second page representreflectance values in the visible red and near infraredwavelength bands measured by a remote sensing instrument fora parcel of land. Plot the reflectance values for each pixel on thegraph below and write the number of each pixel (1-36) next to itslocation in the graph. Pixel 1 has been plotted for you (VisibleRed band = 22, Near Infrared band = 6).2. Identify four land cover classes.Looking at the completed plot from step one, identify and circlefour clusters (classes) of pixels. Label these four classes A, B, C,and D.3. Complete the landcover map grid.Using the clusters you identified in the previous step, fill in theland cover map grid with the letter that represents the land useclass in which each pixel belongs. The result is a classified image.4. Complete a legend that explains the association.Using the spectral response data provided on the bottom of thesecond page, associate each of the four classes with a land useclass.1 2 3 4 5 67 8 9 10 11 1213 14 15 16 17 1819 20 21 22 2325 26 27 28 29 3031 32 33 34 35 3624Land Cover Map 0 50 100 150 200 250Visible Red bandNear Infrared band0 50 100 150 200 2501A = B =C = D =1, 2341 2 3 4 5 67 8 9 10 11 1213 14 15 16 17 1819 20 21 22 2325 26 27 28 29 3031 32 33 34 35 36241 2 3 4 5 67 8 9 10 11 1213 14 15 16 17 1819 20 21 22 2325 26 27 28 29 3031 32 33 34 35 3624223118405414014297613180109Visible Red band38 93 156 406315954 170 158 125 59 164110 163 173 207 180 153146 225 190 163 114 506 11 14 49 1471913 8 100 159 202Near Infrared band5177 166 182 2074 70 116 128 170 19539 49 92 76 146 17766 107 109 96 107 19047Reflectance ValuesVisible Red (Band 3)0 63 127 191 255WFHCUSNear Infrared (Band 4)0 63 127 191 255WFHCUSW = water F = forest U = urbanC = corn H = hay S = sandSpectral Response Data inVisible Red and Near Infrared for 6 cover


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PSU GEOG 482 - Unsupervised Classification Activity

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