ArcGIS Pro includes a useful functionality for generating spectral signature charts, which are essential for analyzing and interpreting spectral profiles of specific areas or surface features within a multispectral image. These profiles are valuable for identifying materials and detecting changes across the Earth’s surface.
To use this tool, a multispectral image is required. For example, a Sentinel-2 image can be utilized. If one is not available, a band composition image may also be used. After the image is added to the map, the spectral profile can be generated by right-clicking on the image and selecting Create Chart > Spectral Profile.
Areas of interest within the image can be selected using points, lines, or polygons. Once selected, the software generates a spectral signature showing the reflectance values across the different spectral bands. Various display formats are available, such as mean lines, boxes, or combined views.
In the chart’s properties panel, profile names can be renamed by entering a new name and pressing the “Tab” key to apply the change. This feature supports the organization and interpretation of different profiles in a more effective manner.
Spectral signatures from a Sentinel 2 image.
Additionally, ArcGIS Pro allows charts to be added directly to the layout, which is useful for complementing maps with graphical information. The chart content can also be exported as a table using the Export button, located above the chart. This capability increases flexibility in reporting and supports the creation of high-quality cartographic outputs.