Combining bands into one raster dataset can help you organize many related single-band rasters.To do further visual analysis, you may need to combine the outputs by rendering your data as a color composite. In some cases, the output of an analysis operation is a single-band raster dataset.To create this color composite, each raster dataset needs to be contained as individual bands within a single raster dataset. To identify the bands, add B or b to the beginning of the band number. The supported operators are -,+,/, and unary. By displaying these raster datasets as a color composite, you can detect change in the area, such as urban growth or cut forests. When using the User Defined method to define your band arithmetic algorithm, you can enter a single-line algebraic formula to create a single-band output. You may have several raster datasets of the same area captured at various times.To render these raster datasets together to create a color composite, each band needs to be contained within a single raster dataset (for example, allbands.tif). The Extract Band function allows you to extract one or more bands from, or reorder the bands in, a multiband raster dataset. You may have received some satellite data where each band of data is contained in a single file-for example, band1.tif, band2.tif, and band3.tif. BAI method The Burn Area Index (BAI) uses the reflectance values in the red and NIR portion of the spectrum to identify the areas of the terrain affected by fire. A raster function that performs an arithmetic operation on the bands of a raster.The following are some examples of why you would want to combine single raster datasets into multiband raster datasets: You can change this by setting the output extent and output coordinate system in the Environment Settings. The output raster dataset takes the cell size from the first raster band in the list.īy default, the output raster dataset takes the extent and the spatial reference of the first raster band with a spatial reference in the list. You can save your output to BIL, BIP, BMP, BSQ, DAT, Esri Grid, GIF, IMG, JPEG, JPEG 2000, PNG, TIFF, MRF, CRF, or any geodatabase raster dataset. Use multiple Spatial Analyst tools in a single expression. Apply Spatial Analyst operators on three or more inputs in a single expression. Support the use of variables in Map Algebra when in ModelBuilder. This tool can only output a square cell size. The Raster Calculator tool is designed to offer the following benefits: Implement single-line algebraic expressions. The order that the bands are listed in the Multi-value Input control box will determine the order of the bands in the output raster dataset. This is useful if you need to create a new raster dataset with a specific band combination and order. This tool can also create a raster dataset containing subset of the original raster dataset bands. Creates a single raster dataset from multiple bands.
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