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BullWinkus
Tourist


Reged: 06/25/06
Posts: 6
Loc: Michigan, USA
A Proposed Data Tool
      #479977 - 06/26/06 06:09 PM

View in Google Earth         View in Google Maps (824 downloads)

Hello everyone. I'm still new to Google Earth Community, so please be kind.

I was trying to use Google Earth to study the area affected by Glacial Lake Missoula. This is a lake that was created during the ice ages when a glacier blocked the Kootenai, Priest and Clark Fork Rivers at Lake Pend Oreille in North Idaho. The glacier rested in and formed the valley of the Kootenai River that reaches into Idaho from British Columbia, Canada. As it descended southward, it first blocked the upper end of the Kootenai. By the time the glacier had reached the point where Lake Pend Oreille exists today, it had blocked the channels of the Priest and Clark Fork Rivers. These rivers, dammed up by the glacier, formed huge lakes that reached past Missoula, Montanna going east. Hence the name Glacial Lake Missoula.

The area affected by the glacier lake was so large, that it is very difficult using Google Earth to know the reach of the backwaters formed by the glacial blockage.

So, I would like to propose a tool. This tool would work off of the elevation data to create a shadow map of a basin up to a user specified elevation. Simply put, the user selects the tool and clicks on the map. All image area below the elevation of the click point is shadowed (or colored). The rest is unaffected. This would allow the operator to find the contour of any potential reservoir.

Is such a tool possible?

Regards,
H. Vickers

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Forkboy2
Cartographer


Reged: 07/16/05
Posts: 445
Re: A Proposed Data Tool [Re: BullWinkus]
      #714082 - 12/10/06 04:59 PM

I doubt they will ever add that feature to Google Earth since their focus is more on the non-technical user and not doing detailed scientific analysis.

I'm sure there are some GIS systems (ArcGIS, Manifold, GlobalMapper, etc,) that would perform this function.

One thing you could maybe do is create a horizontal polygon at the elevation you are interested in, which I think would show what is above and below that elevation very clearly.


Matt

--------------------
Matt
Google Earth Library

Edited by Forkboy2 (12/10/06 05:02 PM)

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barryhunter
Guide


Reged: 07/30/05
Posts: 596
Loc: Wales, Europe
Re: A Proposed Data Tool [Re: BullWinkus]
      #714707 - 12/11/06 05:09 AM

Try GEflood:
http://bernhard.sterzbach.de/geflood.html

this basically does what Forkboy2 mentions....

--------------------

- www.nearby.org.uk - www.geograph.org.uk - www.trigtools.co.uk -

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