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3/28/2019 2:33 pm  #1


Image analysis

Hey folks,

Is there a way to analyze satellite images from different days?.  I've been downloading NOAA AOML satellite images each day for the past few weeks to see the location of the Gulf Stream between Newport and Bermuda.  I import those images into Expedition and geo-reference them.  It's great to compare the satellite images with the RTOFS current model.

But what I'd like to do is to use Expedition to track the stream over the course of my daily downloaded images.  That way, I can see, e.g., how many miles the meander or an eddy is moving each day, etc., and can better predict where those features might be 2 days out from Newport when I won't be able to download images anymore.

Is there a way to easily cycle between geo-referenced images to accommodate this type of analysis?  For example, it'd be great if the scroll wheel on my Logitech mouse would allow me to do this.

Thanks for any insight.  If it's not a feature that's available, please consider this a feature request!

Thanks,
Josh

Last edited by jreisberg (3/28/2019 2:35 pm)

 

3/28/2019 3:27 pm  #2


Re: Image analysis

Not quite (yet). You have to open each image separately. We can time-stamp individual images, which was intended as a first step to being able to do this.

What are the images? We might be able to add them to MyImage, then you wouldn't have to manually georeference them.

 

3/28/2019 4:20 pm  #3


Re: Image analysis

Nick wrote:

Not quite (yet). You have to open each image separately. We can time-stamp individual images, which was intended as a first step to being able to do this.

What are the images? We might be able to add them to MyImage, then you wouldn't have to manually georeference them.

I get the images from https://cwcaribbean.aoml.noaa.gov/CURRENTS/index.html, which uses a JAVA applet.  I set the coordinates, select the model I want, and then take a screenshot and import the JPG into Expedition.

https://www.dropbox.com/s/5reofugldy8mcqx/AOML%20page%20screenshot.png?dl=0 (AOML page view screenshot showing the parameters I use (from a Frank Bohlen presentation))
https://www.dropbox.com/s/c6tm8ok7gvearxr/AOML%20GS%20%282019.03.28%29.JPG?dl=0 (stream image downloaded today)
 

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