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WeatherCat => WeatherCat General Discussion => Topic started by: mountainhomelodge on December 12, 2020, 11:32:30 pm

Title: Satellite Still Image Hard To Find
Post by: mountainhomelodge on December 12, 2020, 11:32:30 pm
Hi,  Was wondering if anyone has a URL for static satellite images ideally for the west coast of the US.  These images I am hoping to use for the WeatherCat Imagery window, thus providing an animation loop. I see a number of already created animation loops by NOAA, but no luck on individual images.  Perhaps I am not using the WeaterCat Imagery window for what it is intended for.  If folks have other suggestion would love to hear it.  Thanks.
Title: New URLs? (Re: Satellite Still Image Hard To Find)
Post by: elagache on December 13, 2020, 10:17:42 pm
Dear mountainhomelodge and WeatherCat welcome wagon, (http://www.canebas.org/WeatherCat/Forum_support_documents/Custom_emoticons/welcomewagon.gif)


Since this is your first posting, let me welcome you to the WeatherCat forum!!  (http://www.canebas.org/WeatherCat/Forum_support_documents/Custom_emoticons/welcome_smiley.gif)

Hi,  Was wondering if anyone has a URL for static satellite images ideally for the west coast of the US. 
. . . . .

NOAA has recently revamped their websites for satellite images.  Here is the home page:

https://www.star.nesdis.noaa.gov/GOES/index.php (https://www.star.nesdis.noaa.gov/GOES/index.php)

I am also on the west coast and use this page for imagery of the Pacific Southwest:

https://www.star.nesdis.noaa.gov/GOES/sector.php?sat=G17&sector=psw (https://www.star.nesdis.noaa.gov/GOES/sector.php?sat=G17&sector=psw)

There is some navigation at the top of the page for the other sectors of the west.

These images I am hoping to use for the WeatherCat Imagery window, thus providing an animation loop. I see a number of already created animation loops by NOAA, but no luck on individual images.  Perhaps I am not using the WeaterCat Imagery window for what it is intended for.  If folks have other suggestion would love to hear it.  Thanks.

Unfortunately, I've never availed myself of this feature of WeatherCat so I simply don't know.  Perhaps someone else on the forum can help with this question.

Once more welcome!  :)

Cheers, Edouard  [cheers1]
Title: Re: Satellite Still Image Hard To Find
Post by: mountainhomelodge on December 14, 2020, 05:45:14 pm
Thanks for posting those links which I too have tried but with no luck creating a sequence with the still images on WeatherCat.  We'll keep our fingers crossed for further ideas.
Title: Re: Satellite Still Image Hard To Find
Post by: xairbusdriver on December 14, 2020, 07:59:40 pm
I assume you have used the appropriate URL in the WC Prefs->Webcam tab->Image From URL text box. It may seem counter-intuitive to use the "Web-cam Enabled" section. [rockon] [biggrin]
Title: Re: Satellite Still Image Hard To Find
Post by: mountainhomelodge on December 14, 2020, 08:08:16 pm
Thanks for your post.  I am placing the URL in the Imagery tab of the Prefences page.
Title: Re: Satellite Still Image Hard To Find
Post by: xairbusdriver on December 15, 2020, 01:06:10 am
I understand about that location. But I thought you were wanting WC to create a video file to upload to your web site on a continuing basis. That’s why I was asking if you are putting that url in the Web-cam tab of the WC Prefs. That’s where I have the local url for my video images that WC then combines into a time-lapse mp4 and uploads to my site. I may be completely off-base with my understanding/comprehension. It wood knot bee thee furst thyme! [blush]
Title: It works!! Oops?!? Hey wait a minute! (Re: Satellite Still Image Hard To Find)
Post by: elagache on December 16, 2020, 12:03:18 am
Dear mountainhomelodge, X-Air, and WeatherCat troubleshooters,

Okay, I took a shot at trying to figure what the problem is and . . . . . . there is indeed a weird problem that I don't know how to solve.

The first thing I did was to choose an image that was roughly the same size as the display window: 300x300 pixels.  Here is an example:

(https://cdn.star.nesdis.noaa.gov/GOES17/ABI/SECTOR/psw/GEOCOLOR/20203492211_GOES17-ABI-psw-GEOCOLOR-300x300.jpg)

That brings up an image in the satellite image viewer.  Unfortunately, all that is displayed is the same image.  I thought the problem was in WeatherCat, but no - "da' plot thickens."  For whatever reason, NOAA is preserving these images and the date/time of the image is encoded into filename.  So sadly WeatherCat is working fine.  I'm running into exactly the same problem as mountainhomelodge.

So can anybody figure out where you can get a URL for simply the latest image? 

Now two curious minds would like to know!

Cheers, Edouard  [cheers1]
Title: Re: Satellite Still Image Hard To Find
Post by: mountainhomelodge on December 16, 2020, 02:03:41 am
Thanks Edouard for confirming what I was running into and doing a much better job of explaining.  We'll keep our fingers crossed.
Title: Re: Satellite Still Image Hard To Find
Post by: Ktuley on January 03, 2021, 03:28:42 am
Hi Folks.... I think I understand what the question is, and if I do, then I managed to figure out what NOAA is doing.

The most current image has the title of latest.jpg. I think there is also a file with the date and time, but if you grab the display from the page you get the date/time version.

so adjust your URL to put the filename of latest and you'll always get the latest image.  Here's the one I use.

https://cdn.star.nesdis.noaa.gov/GOES16/ABI/SECTOR/sr/GEOCOLOR/latest.jpg

I assume this works on any of NOAAs images... but haven't tested it.

I discovered this by looking at the directory of images... and I saw all the timestamped versions and this latest.jpg.

Hope this helps. 
Title: Re: Satellite Still Image Hard To Find
Post by: mountainhomelodge on January 03, 2021, 04:30:26 am
Thanks so much for posting this link.

I did some playing around and I found by adjusting your link address to this, I was able to get my region in the US for the Pacific Northwest: https://cdn.star.nesdis.noaa.gov/GOES17/ABI/SECTOR/pnw/GEOCOLOR/latest.jpg

File is quite large and I have begun testing to see if it will produce a video time-lapse loop.  Per the link it updates every 5 minutes, I have it set to update every 15 minutes.  We'll see.

Thanks again and Happy New Year.
Title: Re: Satellite Still Image Hard To Find
Post by: Ktuley on January 04, 2021, 03:04:05 am
Glad it helped. and yes, I should have mentioned my image is for the Southwest, where I am.

Title: Latest 300x300 px images? (Re: Satellite Still Image Hard To Find)
Post by: elagache on January 04, 2021, 11:04:16 pm
Dear Ktuley, mountainhomelodge, and WeatherCat troubleshooters,

I am only having partial success using the latest.jpg images.  WeatherCat is able to preview this image, but appears to have some difficulty making movies out of them.  I think the problem is the image resolution.  Here is the link I am using:

https://cdn.star.nesdis.noaa.gov/GOES17/ABI/SECTOR/psw/GEOCOLOR/latest.jpg (https://cdn.star.nesdis.noaa.gov/GOES17/ABI/SECTOR/psw/GEOCOLOR/latest.jpg)

That brings up an image of 2400x2400 pixels.  I'm not sure why, but WeatherCat seems to have difficulty with images of that size.  So for the 64-dollar question, is there any way to get the National Weather Service to give us the 300x300 pixel version of the latest image?

At least one inquiring mind would like to know!

Cheers, Edouard
Title: Re: Satellite Still Image Hard To Find
Post by: mountainhomelodge on January 05, 2021, 12:47:13 am
I am having the same issue and maybe there is a url for a smaller file.  Is NOAA the only source?
Title: Working for me now! (Re: Satellite Still Image Hard To Find)
Post by: elagache on January 05, 2021, 11:00:24 pm
Dear mountainhomelodge and WeatherCat troubleshooters,

I am having the same issue and maybe there is a url for a smaller file.  Is NOAA the only source?

It appeared to me that my setup was still broken, but to my embarrassment, I came back to my WeatherCat installation a few hours later to discover it was working exactly as advertised!  It might be an issue of being very careful when you paste the URL.  I first pasted the URL into a new browser tab to make sure it was correct.  I then deleted the previous URL and after confirming an empty field, pasted the URL that I had tested in the new tab.

Let us know if this solves the problem for you.

Cheers, Edouard
Title: Re: Satellite Still Image Hard To Find
Post by: mountainhomelodge on January 06, 2021, 05:38:28 pm
Thank you for the update.  I followed your thoughts but still no luck with this link.  Perhaps someone could give it a try and see if the file size is too large or perhaps another issue.  Thanks in advance.  https://cdn.star.nesdis.noaa.gov/GOES17/ABI/SECTOR/wus/13/latest.jpg
Title: Giving URL a try. (Re: Satellite Still Image Hard To Find)
Post by: elagache on January 06, 2021, 11:05:40 pm
Dear mountainhomelodge and WeatherCat troubleshooters,

Thank you for the update.  I followed your thoughts but still no luck with this link.  Perhaps someone could give it a try and see if the file size is too large or perhaps another issue. 

Okay, I just added your URL to channel 2 of the satellite imagery preferences.  It does preview correctly.  Can you get the preview?  It will take a few hours to load up so I'll report back tomorrow if I can make that link work.

Stay tuned!

Cheers, Edouard  [cheers1]
Title: Alternative images.. (Re: Satellite Still Image Hard To Find)
Post by: elagache on January 07, 2021, 11:17:24 pm
Dear mountainhomelodge and WeatherCat troubleshooters,

Thank you for the update.  I followed your thoughts but still no luck with this link.  Perhaps someone could give it a try and see if the file size is too large or perhaps another issue.  Thanks in advance.  https://cdn.star.nesdis.noaa.gov/GOES17/ABI/SECTOR/wus/13/latest.jpg

Okay, I can replicate that the URL you selected does not work.  I decided to try some of the image on this page:

https://www.star.nesdis.noaa.gov/GOES/sector.php?sat=G17&sector=wus (https://www.star.nesdis.noaa.gov/GOES/sector.php?sat=G17&sector=wus)

As you can see, there are lot of possible image renderings that you can choose from.  I picked this one as something close to what you were seeking:

https://cdn.star.nesdis.noaa.gov/GOES17/ABI/SECTOR/wus/AirMass/latest.jpg (https://cdn.star.nesdis.noaa.gov/GOES17/ABI/SECTOR/wus/AirMass/latest.jpg)

It is working fine on my WeatherCat installation.  Let us know if you can make this image work and either or not that suffices.  Otherwise you might be able to create your own URL from the page I mentioned above.

Cheers, Edouard
Title: Re: Satellite Still Image Hard To Find
Post by: mountainhomelodge on January 07, 2021, 11:37:47 pm
Thanks for the research on the image, that's great one and I am testing now and will post the outcome soon.  Thanks Again!
Title: Re: Satellite Still Image Hard To Find
Post by: mountainhomelodge on January 08, 2021, 12:52:56 am
Working like a champ.  Thanks again all the help!
Title: Re: Satellite Still Image Hard To Find
Post by: Ktuley on January 08, 2021, 03:56:53 am
Hey all, let me provide a little bit of how I discovered the "latest.jpg" concept. It may help in finding the right size picture and other things.

If you remove the latest.jpg from the url.... you'll see a directory of images.... I don't know how long they stay there, however you'll see there are a number of dated images... but there is also the "latest.jpg" image. and in the case of this URL https://cdn.star.nesdis.noaa.gov/GOES17/ABI/SECTOR/wus/13/
there are different size ones as well..

So if you find the image you're looking for, via some URL, remove the image name, and look at the directory. then choose the version (size etc) you want.
I’m pretty sure this is how NOAA is always displaying the "latest version". When a new file comes in, it creates the timestamped version and all the related sizes as the latest.

Remember too, that if you're capturing an image every 30 minutes, it takes a few hours to have enough different images to actually see it as a movie.

Hope this helps.

Ken
Title: Good to hear! (Re: Satellite Still Image Hard To Find)
Post by: elagache on January 08, 2021, 10:30:56 pm
Dear mountainhomelodge, Ken, and WeatherCat faithful,

Working like a champ.  Thanks again all the help!

Good to hear!  Thanks for asking your question.  I never had an excuse to try this WeatherCat feature.  It turns out to be very handy, especially since the National Weather Service imagery pages aren't nearly as convenient as the old ones.

Hey all, let me provide a little bit of how I discovered the "latest.jpg" concept. It may help in finding the right size picture and other things.

If you remove the latest.jpg from the url.... you'll see a directory of images.... I don't know how long they stay there, however you'll see there are a number of dated images... but there is also the "latest.jpg" image. and in the case of this URL https://cdn.star.nesdis.noaa.gov/GOES17/ABI/SECTOR/wus/13/
there are different size ones as well..
. . . . .

Thanks for the explanation!  I had given up on trying to get a directory from a web server since most of the time this feature is turned off for security reasons.  In this case it is every helpful indeed.  As you point out, you might choose a smaller image and save some disc space on your computer.  As noted in the manual on page 46, WeatherCat doesn't delete these files.  Using the smallest image will save you a lot of disc space in the long term.

Cheers, Edouard  [cheers1]
Title: Re: Satellite Still Image Hard To Find
Post by: Ktuley on January 09, 2021, 06:52:14 am
That's a BIG YES! on the big files not being deleted. I forgot about that and found that not only did I have something like 80GB of images, they were being backed up too... so 80 GB times 7 backups.... and I was wondering why my backups were taking longer and longer to finish...Cleaned that up, and adjusted the image capture time too... AFTER reading that section of the manual!!!