I'm working on determination of soil moisture by remote sensing. I would like to know how we can determine soil moisture index values from reflectance values in LANDSAT TM images.
Tell me more
×
Geographic Information Systems Stack Exchange is a question and answer site for
cartographers, geographers and GIS professionals. It's 100% free, no registration required.
|
|
|||||
|
|
I would recommend calculating soil moisture indices from Landsat TM bands. MTRI has an interesting article on creating soil moisture index (SMI) from Landsat TM 5. Also, I would recommend exploring soil moisture estimates using TM band 6 (Thermal IR). Attached is a good tutorial on calculating indices from Landsat TM bands using ArcGIS 9.x (as you tagged). Although they are calculating NDVI and SAVI veg indices, you should have no problem using this tutorial and incorporating the SMI in the first article. You may also be interested in radar remote sensing of soil moisture. There is a lot of active research in this subject. |
|||
|
|
You can also use GRASS for this work, I have found that it provides robust results for indices calculation when atmospheric correction is applied as per the modules. |
|||
|
|
|||
We're looking for long answers that provide some explanation and context. Don't just give a one-line answer: please explain why you're recommending it as a solution. Answers that don't explain anything will be deleted. See Good Subjective, Bad Subjective for more information. |
|||
