The Remap function allows you to change or reclassify the pixel values of the raster data. This can be done by
- Specifying a range of pixel values to map to an output pixel value
- Using a table to map the pixel values to output pixel values
The output pixel value can be a valid value or a NoData value. There is also an option to map any unspecified values to NoData.
When using the Table method, you can add any table supported by ArcGIS. This method maps a single value to a new value. The table must contain an input and output value field which you will identify in the dialog box after you add the table.
When using the Manual method, you enter a range of values by specifying a minimum and maximum value and assign the range to an output value or to a NoData value. The minimum value in the range is inclusive and the maximum value is exclusive, as explained in the table below.
| Minimum (inclusive) | Maximum (exclusive) | Actual values converted to output value |
|---|---|---|
1 | 10 | 1–9 |
10 | 20 | 10–19 |
50 | 51 | 50 |
The order of the ranges in the table is also considered. The top row is processed first, then each row below is processed in order, as shown in the tables below.
| Minimum (inclusive) | Maximum (exclusive) | Actual values converted to output value |
|---|---|---|
1 | 15 | 1–14 |
10 | 30 | 15–29 |
30 | 40 | 30–39 |
| Minimum (inclusive) | Maximum (exclusive) | Actual values converted to output value |
|---|---|---|
10 | 30 | 10–29 |
1 | 15 | 1–9 |
30 | 40 | 30–39 |