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Author Topic: rivers in microdem: howto?  (Read 412 times)

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Uzin

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rivers in microdem: howto?
« on: February 14, 2024, 08:27:37 AM »

Can anybody describe how  to get the rivers out of microdem , if even possible ?
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WxTech

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Re: rivers in microdem: howto?
« Reply #1 on: February 14, 2024, 11:13:42 AM »

Do you mean to automatically trace along the troughs of valleys?

I've manually done this, with map_c overlaid with the map_t in Photoshop (and the latter scaled up the necessary 4X, of course). Even then, I have found that the river line so created is generally offset by a couple of pixels on map_c, due to the way the map_t pixel is referenced to one of the corners of that pixel. This can be fixed by simply selecting the river(s) and shifting as necessary.
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Uzin

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Re: rivers in microdem: howto?
« Reply #2 on: February 14, 2024, 11:46:35 AM »

Do you mean to automatically trace along the troughs of valleys?

Yes, precisely that.
Perhaps you will try the link by australian guy at Aviaskins:

http://forum.aviaskins.com/showthread.php?p=227487#post227487

http://hydro.iis.u-tokyo.ac.jp/~yamadai/MERIT_Hydro/
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genXgamer

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Re: rivers in microdem: howto?
« Reply #3 on: February 14, 2024, 02:03:25 PM »

G'day Uzin

Hope you had a happy birthday and many more to come.

Do you have the Lake check box selected when using Microdem?



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Uzin

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Re: rivers in microdem: howto?
« Reply #4 on: February 14, 2024, 03:25:59 PM »


Do you have the Lake check box selected when using Microdem?


Thanks, tried, but unfortunately, I wrecked-spoiled my microdem installation.
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Chrival

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Re: rivers in microdem: howto?
« Reply #5 on: February 14, 2024, 06:44:35 PM »

Hi Uzin
What do you want exactly ?

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Uzin

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Re: rivers in microdem: howto?
« Reply #6 on: February 14, 2024, 11:52:24 PM »

Hi Uzin
What do you want exactly ?


First of all, to restore my microdem install Build 2022.5.9 (microdem.exe file missing).
Second, to find where the rivers are drawn in microdem, if at all.
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