Arctic Sea Ice : Forum

Cryosphere => Greenland and Arctic Circle => Topic started by: Tealight on April 14, 2019, 03:40:48 AM

Title: Bedrock overlay poll
Post by: Tealight on April 14, 2019, 03:40:48 AM
I've often seen users asking about a glaciers bedrock elevation to estimate future retreat. Then some veteran users post a bedrock map, but it's still difficult to compare it to current satellite images. Therefore I want to build a bedrock overlay webpage for all major glaciers. However I'm not sure which of the two presentation styles is better.

You can vote for both options if you have no major preference.

Horizontal overlay
https://cryospherecomputing.tk/Test1

Full image Opacity
https://cryospherecomputing.tk/Test2
Title: Re: Bedrock overlay poll
Post by: Tor Bejnar on April 14, 2019, 04:47:00 AM
I didn't know what the words meant - "horizontal overlay" vs.
full image opacity".  However, opening the two files, and figuring out that the maroon dot [Test 1- horiz. overlay] is a slide anchor (I think I first saw the tool when looking at before and after photographs of fire-ravaged areas last year, where you can slide one image over the other - back and forth), gave me the information needed to make a choice.
Title: Re: Bedrock overlay poll
Post by: Shared Humanity on April 14, 2019, 05:23:51 AM
Horizontal overlay is amazing. I now will never be able to avoid this site.
Title: Re: Bedrock overlay poll
Post by: Sleepy on April 14, 2019, 06:45:14 AM
Definately horizontal and a future bookmark. Nice.
Title: Re: Bedrock overlay poll
Post by: b_lumenkraft on April 14, 2019, 06:57:14 AM
OMG, how awesome is this? (horizontal)
Title: Re: Bedrock overlay poll
Post by: Stephan on April 14, 2019, 08:31:21 AM
I also voted for horizontal overlay.
It would be great, if a comparable overlay were possible for all the Amundsen Bay glaciers and ice sheets!
Title: Re: Bedrock overlay poll
Post by: Pmt111500 on April 14, 2019, 09:50:31 AM
I'd prefer a slider for opacity. Grey-scale glacier images and colors for bedrock elevation. Cool project.
Title: Re: Bedrock overlay poll
Post by: oren on April 14, 2019, 10:20:52 AM
I'd prefer a slider for opacity. Grey-scale glacier images and colors for bedrock elevation. Cool project.
Same here. Prefer the opacity presentation but an option for changing opacity level would make it better.
Title: Re: Bedrock overlay poll
Post by: RealityCheck on April 14, 2019, 10:46:39 AM
Well done Tealight!
Both seem very goid. But the maroon anchor is a bit awkward to use on a mobile phone... maybe if you use that form, it could be tweaked?
Looking forward to the WAIS version...!
RC
Title: Re: Bedrock overlay poll
Post by: johnm33 on April 14, 2019, 12:34:20 PM
I think both are quite stunning.
Title: Re: Bedrock overlay poll
Post by: Tealight on April 20, 2019, 11:34:33 AM
Thanks everyone for voting. As I suspected both options have a use case. The problem with combining them was that the template for the image overlay slider and the template for the range slider both had "slider" in the name and interferred with another. I solved it by setting the opacity with a number input field and a button.

The test pages are now removed and the overlays have an offical page:
https://cryospherecomputing.tk/Bedrock