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What kind of file format does ERDAS Imagine use?
ERDAS IMAGINE File Format (IMG) Description. The format we are calling ERDAS_IMG to distinguish from other uses of the .img file extension is a proprietary, partially documented format for multi-layer geo-referenced raster images developed originally for use with ERDAS IMAGINE software.
How to change class name in ERDAS IMAGINE?
Close the Formula window. In the Raster Attribute Table, select the first row. Click on the Color patch under the color column for class 1 in the cell array and change the color to Yellow. (you also choose any type of color). Change the class name also. Apply the same process to all of the classes.
How to calculate class opacity in ERDAS IMAGINE?
Before analyzing the classes Individually need to set the Opacity for all the Classes to Zero. In the Raster Attribute Table, click the Opacity column, right-click, and select Formula. The Formula dialog opens, click 0 on the number pad, then click Apply. Close the Formula window.
How big is the tile size in ERDAS IMAGINE?
ERDAS IMAGINE software uses a tiled format to store raster layers. The tiled format allows raster layers to be displayed and resampled quickly. The default tile size used to be 64 pixels by 64 pixels, but now appears to be 512 pixels by 512 pixels.
How are pyramid layers created in ERDAS IMAGINE?
In pyramid layers, reduced, subsampled raster layers are created from the original raster layer. ERDAS_IMG is based on a Hierarchical File Format (HFA) structure. Many of the items that can be included are optional. In addition, because of the open nature of the HFA format, developers may create and add new types of items to the file.
How to add a TM band in ERDAS?
From the main ERDAS toolbar, go to the Interpreter/Utilities/Layer Stack module to combine your individual *.img files into a single multilayer *.img file. From the Layer Selection and Stacking dialog box, select your first TM band, then click the Add button to add it to the list of files that you want to combine into a single multilayer .img file.
How to import ETM data into ERDAS IMAGINE?
Note that data for each band are stored in binary f iles (.I1,….I9) and that these binary files contain no header information. Go to Import from the main ERDAS Imagine toolbar. Select Import, Type: Generic Binary, Media: File, then select the binary file containing ETM band 1. Then select a folder and a name for the output file.