Doctor Sonar Chips

[CatDaddy]

Anyone ever use these? Sounds like Perch Patrol guys use them on Devil's Lake along with some tournament fishermen. Neat concept.

Overlays aerial photos of the lake from 1949, 1980, or 1990 with contours of lake elevation to get you started finding the "spot on the spot". You can see all the old roads, farmsteads, trees, etc. that are now underwater. Seems like you can then turn on your contours on your head unit and see lake depth overlaid.

https://doctorsonar.myshopify.com/c...of-devils-lake-3-sd-card-set-1990-1980ir-1949

 

[svnmag]

I like to to get those Frito's Scoops, fill them with peanut butter then drizzle honey on the whole deal: It's good.

 

[Vollmer]

They are impressive chips.

 

[CatDaddy]

They are impressive chips.

There are some different options....side imaging, different years of overlay. Any insight into what a guy should start with or what the differences/benefits to variations are?

 

[Coldfront]

There are some different options....side imaging, different years of overlay. Any insight into what a guy should start with or what the differences/benefits to variations are?

I have his chip for Sakakawea. Very good.

 

[riverview]

they are only for Lowrance i believe and they have been around for quite a few years now.

 

[wslayer]

Lot of coin for one lake. If that's only body ya fish

 

[Vollmer]

There are some different options....side imaging, different years of overlay. Any insight into what a guy should start with or what the differences/benefits to variations are?

I’m no expert. I run bird graphs, so my only times with it has been in other boats, but I thought it was handy.

 

[Walleye202]

Most have ran these for the past 10 years plus. Zero secrets left.

 

[Traxion]

I think they have value if you’re somewhere you’ve never spent much time on. A buddy had one for Sharpe and the old imagery is really good for fining the old trees. I feel the regular chips are just as good with standard contour mapping.

 

[CatDaddy]

I think they have value if you’re somewhere you’ve never spent much time on. A buddy had one for Sharpe and the old imagery is really good for fining the old trees. I feel the regular chips are just as good with standard contour mapping.

That's what I was thinking....I don't spend much time at all on Devil's Lake and it can be intimidating to try and dissect. Would at least help me find trees, rocks, roads, etc.

 

[luvcatchingbass]

With a little time and work there is a way to use Google earth to make your own historical maps then send them to a Google map on your phone. Have done this for a handful over the years. Doesn't give depth so you need to go sample yourself but it has helped me find some interesting spots

 

[Traxion]

With a little time and work there is a way to use Google earth to make your own historical maps then send them to a Google map on your phone. Have done this for a handful over the years. Doesn't give depth so you need to go sample yourself but it has helped me find some interesting spots

I haven’t found pre flood imagery on Google for the Missouri River reservoirs. Am I missing it? That is what I found handy with the chips.

 

[Slappy]

Aerial imaging technology was just slightly lower quality in the 50's when the dams were built compared to recent satellite imagery...

 

[lunkerslayer]

The arc/gis overlay from 57/62 will work with Google earth pro which helps greatly in figuring out what you are looking at but the 1990 overlay is still the best for more up todate landmarks when it comes to devils lake. The older overlay is great for other areas of North Dakota especially those areas that are now reservoirs where the land is underwater. I have been using the Google earth overlay and finding structure for years but GPS is still lacking accuracy so finding those way pts is difficult during the winter months.
https://ndgishub.nd.gov/arcgis/rest/services/Imagery/AerialImage_ND_19571962/ImageServer?f=jsapi
Your welcome

 

[Traxion]

Aerial imaging technology was just slightly lower quality in the 50's when the dams were built compared to recent satellite imagery...

Obviously yes. What he did when he built these chips was integrate either the old photos or somewhere found digital data of the old riverbed. You layer in the historic pictures if you choose. The images aren’t great, but the clearly show the heavily wooded areas. That was the most helpful thing. You can also see the old topography which helps put a picture in my mind. I am just wondering if there’s a digital source of old imagery somewhere. Google only goes to the 80’s.