How to create a grayscale georaster image

Question

Hi,
This is the code that i am using to create a georaster template image.
sdo_geor.createTemplate(idw_img, 21001,
'dimSize=(512,512,3) cellDepth=32BIT_REAL interleaving=BIP ',
null, 'TRUE');
Anyways, the above code works and when i try to export, i can see a rgb image file.
But, i need to create a grayscale image. Can anyone let me know how can i specify and create a grayscale georaster image. Please note that my cell values are decimals type.
Thanks,
Bal

Answer 1

Balaji,
In your second command, you copied the "*" from my post. That is not part of the command. It supposed to turn the text into bold. Sorry for the misunderstanding.
My suggestion was for you to try to work with a single-band image. I don't know what are the other commands you have in your code but are you sure that the error message "invalid band and layer number" is coming from sdo_geor.createTemplate? You might have some code after that is still expecting the 3 bands and that is where the error is coming from.
So here is the summary:
If what you want to see is a "grayscale" image and your data type is 32BIT_REAL, there is no need to 3 bands. If you have to have 3 bands. You can use GeoRasterViewer and play with the option "View>Show Layer Mapping" or alt+p to select the band you want to see. If you want to see band 1, select "1" for Red, "1" for Green and "1" for Blue and click on "Refresh".
Photo viewers can only handle well unsigned 8 bit integer. I suspect. On GeoRasterView you might try the "Image" processing option to find the best representation of the cell values of that image.
Regards,
Ivan