Auto news on Youtube Jan 31 2018

I'm Leif Olmanson, I'm a researcher at the

University of Minnesota.

Minnesota is kind of a natural fit for using

Landsat for water quality assessments. It's a very

diverse state with over 10,000 lakes. Probably

like 20 years ago we started using Landsat for

water clarity assessments. And that led to a thing we

did about 15 years ago, was actually make our

data available in a google earth format on Lake Browser.

And having that data available has proven to be very popular.

Over the years we've seen the data with Landsat 8 now

much less noisy data then we've had in the past.

Also the processing of the data has improved a lot.

When we first started this, you had a lot of work to do

to get an image where you could actually use it. you

had to geometrically correct it, you had to do all kinds

of crazy stuff to actually start using it. Now we have

a lot of products like the surface reflectance product

And now just recently with the analysis ready data

basically you can start using it right away, which is

a big improvement.

Having this always changing land cover map will be a very

useful product for some of these projects that we have.

And also the methodology will be consistent over

time where what we've found is some of the older land

cover classifications, there's a different method used

every time it's done, so it's not conducive to

determining what's changing on the landscape so

having this continuous one method will be very

useful for lots of studies including lakes.

The largest thing that Landsat has is the archive.

I mean that's the most important thing. There's

no other sensor we can go back at look at in the

lakes. Some of the new ones might have some

better spectral bands or something that might

be able to identify chlorophyll better but

nobody has that that archive.

For more infomation >> Landsat in Action - Minnesota Lakes with Leif Olmanson - Duration: 2:05.

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