How Edit Signatures works
The Edit Signatures tool is designed to modify the existing signature file. Most frequently, this tool is used to reduce the number of classes. To determine which class signatures should be changed to produce a more accurate classification, view the tree diagram with the Dendrogram tool.
Example
The following example shows how a signature file with 14 classes is edited to have only 7 classes. This is done by deleting unnecessary classes and merging like classes. The following is the input signature remap file that will be used to edit the signature file. It will merge classes 8 and 21 with 3, 9 with 1, 14 with 4, 15 with 7, and 23 with 6. It will also delete class 11.
8 : 3 9 : 1 11 : -9999 14 : 4 15 : 7 21 : 3 23 : 6
Output signature file
The resulting output signature file from Edit Signatures is listed below:
# Signatures Produced by ClassSig from Class-Grid zsamp12 and Stack redl123
# Number of selected grids
/* 3
# Layer-Number Grid-name
/* 1 redlands1
/* 2 redlands2
/* 3 redlands3
# Type Number of Classes Number of Layers Number of Parametric Layers
1 14 3 3
# ===============================================================
# Class ID Number of Cells Class Name
1 4493
# Layers 1 2 3
# Means
57.4801 55.1022 34.5615
# Covariance
1 755.8841 389.1188 165.2408
2 389.1188 451.9519 248.4967
3 165.2408 248.4967 163.7970
# -------------------------------------------------------
# Class ID Number of Cells Class Name
2 1464
# Layers 1 2 3
# Means
142.5451 48.3053 22.8818
# Covariance
1 301.2310 61.3188 -24.5077
2 61.3188 150.2574 102.7169
3 -24.5077 102.7169 103.9020
# ------------------------------------------------------
# Class ID Number of Cells Class Name
3 142
# Layers 1 2 3
# Means
226.2817 94.4225 25.4789
# Covariance
1 1250.7286 448.2489 -11.1146
2 448.2489 302.1464 75.3991
3 -11.1146 75.3991 67.7407
# ------------------------------------------------------
# Class ID Number of Cells Class Name
4 399
# Layers 1 2 3
# Means
161.6867 174.5113 177.4386
# Covariance
1 29.0699 23.6907 32.0523
2 23.6907 65.3359 38.7300
3 32.0523 38.7300 55.1061
# ------------------------------------------------------
# Class ID Number of Cells Class Name
5 1476
# Layers 1 2 3
# Means
0.0589 0.0976 1.2026
# Covariance
1 3.1321 2.4268 3.5081
2 2.4268 2.8922 3.9924
3 3.5081 3.9924 6.7094
# ------------------------------------------------------
# Class ID Number of Cells Class Name
6 225
# Layers 1 2 3
# Means
138.5378 140.1644 168.5600
# Covariance
1 151.4461 120.3978 142.3225
2 120.3978 142.5309 128.7914
3 142.3225 128.7914 149.9618
# ------------------------------------------------------
# Class ID Number of Cells Class Name
7 383
# Layers 1 2 3
# Means
129.2950 146.6136 97.0836
# Covariance
1 72.6745 21.6483 74.7947
2 21.6483 20.2377 38.7392
3 74.7947 38.7392 164.1239
# ------------------------------------------------------
# Class ID Number of Cells Class Name
8 948
# Layers 1 2 3
# Means
251.3091 76.7447 22.7795
# Covariance
1 49.3943 2.3736 -16.1440
2 2.3736 89.0773 13.2319
3 -16.1440 13.2319 12.8732
# -----------------------------------------------------
# Class ID Number of Cells Class Name
9 446
# Layers 1 2 3
# Means
100.0022 61.6861 39.1323
# Covariance
1 50.9685 3.0816 -2.7846
2 3.0816 81.6765 57.7427
3 -2.7846 57.7427 57.0229
# ------------------------------------------------------
# Class ID Number of Cells Class Name
11 244
# Layers 1 2 3
# Means
133.8402 85.3934 84.4672
# Covariance
1 78.2336 -1.2908 -20.0320
2 -1.2908 58.4454 29.1652
3 -20.0320 29.1652 77.5586
# -----------------------------------------------------
# Class ID Number of Cells Class Name
14 186
# Layers 1 2 3
# Means
159.5753 212.3172 163.9677
# Covariance
1 112.8186 197.4165 155.3484
2 197.4165 432.0772 319.2643
3 155.3484 319.2643 265.5773
# ------------------------------------------------------
# Class ID Number of Cells Class Name
15 149
# Layers 1 2 3
# Means
144.9262 154.2483 113.9262
# Covariance
1 191.0824 27.4239 137.5486
2 27.4239 81.4717 13.0252
3 137.5486 13.0252 114.0283
# -----------------------------------------------------
# Class ID Number of Cells Class Name
21 253
# Layers 1 2 3
# Means
235.0514 98.1107 32.6324
# Covariance
1 278.8188 81.3633 -12.5802
2 81.3633 132.3131 36.1639
3 -12.5802 36.1639 38.6699
# ----------------------------------------------------
# Class ID Number of Cells Class Name
23 121
# Layers 1 2 3
# Means
145.3223 143.9669 155.3058
# Covariance
1 21.4536 16.4524 24.5590
2 16.4524 43.2322 14.8685
3 24.5590 14.8685 79.9140
Related Topics
6/29/2011