Select colors that are easily distinguished and in some logical order. You can change colors by right-clicking on a color in the layers panel, which brings up a matrix of standard colors. Usually, values of 1 are due to remaining speckle in the data after filtering. It is a good idea to set the color for 0 and 1 to black. Notes: The combined image will display with random colors assigned. Click the OK button to execute the command.Specify the path and filename of the output raster you will create.Continue adding filenames with the symbol + between each until all image names are used.Double-click on the first image name then click on the + button.Bring up Raster Calculator and notice the list of images on the left.Using your file browser, navigate to the output directory containing the animated GIF. Click the Save button, specify the output filename, and click save again to save the animated GIF image.In the image size section, type 15% to reduce the image size of the output. Notes: A warning may be displayed due to the size of the images click yes if it does.

To save this animation, select File > Save For Web.If you want the animation to loop more than once, click on the Once button located below the timeline images and select 3 times, for example.If the specific delay you want is not listed, select Other and enter the delay. Click on the “0 sec.” dropdown menu under each frame, which offers a choice of delay settings.The delay of 1.0 was when one cycle was skipped 1.5 for when two cycles were skipped, etc. Each cycle is 671 orbits if there are gaps in the temporal coverage, then a longer delay can be set as a multiple of 0.5 seconds. Notes: It is preferred to set the delay to increments of 0.5 seconds per cycle of PALSAR data. There is a delay setting below each frame. In the timeline menu, select Make Frames From Layers to populate the timeline with all image frames.In the bottom right corner of the image display window, click on the menu button that looks like an arrowhead next to four horizontal lines.In the Name field, specify the output filename, such as “class_xxxxx_db.tif,” and Format: “TIFF.”.Specify an output directory by clicking the folder button then browse to the desired output directory.Set Output Raster to Use Renderer and Force RGB.When each image is colored correctly, right-click on the image and select Data > Export Data… This will display the Export Raster Data window.Use the Apply Symbology From Layer tool ( Data Management Tools > Layers and Tables Views) to set the symbology of the remaining greyscale images, with the Symbology Layer field set to any correctly colored image.Save a colorized raster dataset for each classified image for creating an animation. Some knowledge of the extent of seasonal flooding is useful to confirm that the results are correct. Notes: We found it useful to pick a minimum flood and maximum flood image to verify that the breakpoints work as desired. You should see the image classified with water channels as blue and double bounce areas as yellow. Set the first class Color to blue, second class Color to black, and third class Color to yellow. Select the number of classes to be 3 and enter both breakpoint values.Notes: We found “-4” to be a good value for the second class. Decrease the breakpoint value by one until the amount of speckle is close to what was observed for the blue class.Look for yellow in the image and notice how much speckle noise you have away from the bright feature areas. Set the first class color box to black and the second class color box to yellow, for values greater than the breakpoint.Here, you will determine a breakpoint on the other side of the large peak. Determine a second breakpoint for areas in the image that are brighter due to double bounce of flooded forests.Notes: We found “-11” to be the best value for minimizing water speckle over land. Again specify the two colors for the two classes as blue and black then click OK.Change the value of the breakpoint, increasing it by one each time (so “-13” is the first increased value).Click on the Symbology tab then click on Classify….Right-click the image layer and select Properties.Refine the breakpoint value until water is mostly contained within river channels, and a very small number of blue dots show on land outside river channels.

Notes: The values for the breakpoints can change significantly between locations and datasets, and will generally require several iterations to determine. The feature layer will be displayed with open water as blue and land as black.

Double-click on the second class Color box, select black and click OK.

Under Color Ramp, double-click on the first class Color box and select a blue color.

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