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QUETICO HYDROGRAPHIC MAPS

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Date/Time: 04/29/2024 10:40AM

Subject:

QUETICO HYDROGRAPHIC MAPS

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Previous Messages:
Author	Message Text
timatkn	07/22/2016 09:45PM Darn metric system :) T
thebotanyguy	07/21/2016 11:50AM quote RC: "Does anybody know what the standard method for producing the map lake depths is? Is it possible to get the depth from some sort of radar or something from the air? Or does someone need to take a boat over the entire lake and use some sort sonar/depth gauge? I know the radar (or lidar or whatever) used to get the terrain contours bounces off the water and does not penetrate to indicate water depths." Ontario probably uses methodology similar to Minnesota. Here is a link with a description of how lake maps are produced: Lake mapping in Minnesota
AmarilloJim	07/21/2016 10:33AM quote timatkn: "Took a look at the ones they have in there already, unless there is another version not sure what they are trying to do as I could do a better job with my vexilar paddling around :) The Darky Lake one is way off, it looked like max depth is 46 feet? T" Those measurements are in meters so that's 150'
RC	07/21/2016 08:24AM Does anybody know what the standard method for producing the map lake depths is? Is it possible to get the depth from some sort of radar or something from the air? Or does someone need to take a boat over the entire lake and use some sort sonar/depth gauge? I know the radar (or lidar or whatever) used to get the terrain contours bounces off the water and does not penetrate to indicate water depths.
timatkn	07/20/2016 07:47PM Took a look at the ones they have in there already, unless there is another version not sure what they are trying to do as I could do a better job with my vexilar paddling around :) The Darky Lake one is way off, it looked like max depth is 46 feet? T
RC	07/20/2016 11:23AM My understanding is that they plan to do a couple of lakes per year, more or less. Very casual, no set plan.
AmarilloJim	07/20/2016 09:28AM I see on the Ontario MNR website there are a few lakes with crude hydrographic contour lines. Does anyone know anything about these or if they plan on sounding more? http://www.web2.mnr.gov.on.ca/fish_online/fishing/fishingExplorer_en.html