HOW TO

Instructions provided explain how to rescale values from one raster into a new raster so that the shape (distribution) of the raster's histogram (pixel values) does not change.

Note:

The Spatial Analyst extension is needed for ArcGIS to scale the data following the methods listed below.

- Open the Raster Calculator from the Spatial Analyst toolbar. The Single Output Map Algebra tool can also be used.
- Determine the maximum and minimum values used to scale the data.
- Use the following equation to scale the grid values:
Rescaled grid = [(grid - Min value from grid) * (Max scale value - Min scale

value) / (Max value from grid - Min value from grid)] + Min scale value**Example 1:**

Scale from 0-255 (8-bit range) to 0-65535 (16-bit range).For ArcGIS 9.x

For ArcGIS 10.x**Example 2:**

Scale from 0-65535 (16-bit range) to 0-255 (8-bit range).For ArcGIS 9.x

For ArcGIS 10.x**Example 3:**

Scale from range of 0-255 to range of 100-200.For ArcGIS 9.x

For ArcGIS 10.x

Get help from ArcGIS experts

Download the Esri Support App