ETM+ Water Mask
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Assuming you still have the water mask file you just saved open and active as the current image press "Ctrl A" on the keyboard to select the entire image.
Press "Ctrl C" on the keyboard to copy the entire contents of the current selection to the clipboard. i.e. the entire image.
Navigate the menu control "File->Open...".
Navigate your hard drive again and find the full color cloudless image you have already finished.
Select the image and click the "Open" button.
Click on the image for a larger view.
With the new image you just loaded active as the current image, press "Ctrl V" on the keyboard to paste the entire contents of the clipboard as a new layer in the current image.
Right click on the layer name shown below as "Layer 1" in the floating "Layers" tool window. Navigate the popup menu to "Blending Options".
Adjust the "Opacity" slider to around "50"% or so, just enough to enable you to see through the mask to the color image below. This will allow you to properly clean up any stray pixels that where fudged up by the previous "Color Range" selection utility.
Click the "OK" button to finish the "Opacity" adjustment.
Click on the image for a larger view.
Set the "foreground color" to pure white in the color pallet of the floating toolbar.
Change tools to the "Pencil Tool" on the floating toolbar.
You can now zoom in and navigate around the image with either the floating "Navigator" tool window, or the scroll bars at the bottom or right side of the image. It may help at this point to increase the size of your brush.
Draw over the areas which are obviously in the ocean or bays and harbors yet are obviously not sand bars or jutting boulders of rock or reef that may have been shoved above or very near the surface of the water. Remember that tides can sometimes have an effect, so be flexible in what you allow to show. Remember the goal here is to make it look nice! So a little bit of non-shiny surface in the ocean texture is sometimes nice, but only really where it should be. The areas circled below definitely do not belong in that category.
Click on the image for a larger view.
Right click on the layer labeled below as "Layer 1" in the floating "Layers" tool window.
Navigate the popup menu to "Blending Options".
Return the "Opacity" slider to the far right at "100"%.
Click the "OK" button to finish adjusting the "Opacity" setting for that layer.
Click on the image for a larger view.
Navigate the menu control "File->Save As..."
Click on the image for a larger view.
Select the "WaterMask" file you saved earlier. You may need to change the format back to ".bmp" and navigate your hard drive to find the appropriate folder.
Click the "Save" button as shown in the image below. You may need to confirm that the file needs to be written over, as you now have the updated image of the same file. You will need to replace it.
Click on the image for a larger view.
Below you will find a copy of the image in .jpg format for web distribution. Full resolution.
Click on the image for a larger view.
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