Take the 2-minute tour ×
Geographic Information Systems Stack Exchange is a question and answer site for cartographers, geographers and GIS professionals. It's 100% free, no registration required.

Navionics has a nice web map that has some incomplete coverage of Lake Sakakawea. Garmin's BlueChart looks to have something for about $160, but appears to be only compatible with GPS units. Don't need the entire lake just a few areas of it. Would like the data to be ArcGIS compatible. I have attempted to do raster to vector in ArcGIS taking screen shots of Navionics web map but haven't had much success. Any ideas / help would be most appreciated.

share|improve this question
add comment

3 Answers

This solution would take a lot of work, but you could use historical USGS maps to get quite detailed "bathymetry" for Lake Sakakawea. Garrison Dam was only built in the 1950s, so topographic maps from surveys before the 1950s will have the depth below water level (before any fluvial erosion or deposition). I checked on the USGS Topo website and found some 15 minute maps from 1922.

Current imagery: Current imagery

Historical topography: Historical topography

share|improve this answer
    
I am checking out the historical topos now, this might actually work for our needs. Having a corresponding historical index would be helpful, otherwise it's just guessing at which quad name is the one you need. –  sirgeo Jan 8 '13 at 21:52
    
After using batchgeo.com with the csv file export on the usgs site, there does not appear to be any coverage near the upper part of the lake in the pre 1950 topo data set. So this potential solution is a wash unfortunately. –  sirgeo Jan 8 '13 at 23:23
add comment

I would suggest contacting the Army Corps of Engineers office which manages the reservoir. They are sure to have the bathymetry in GIS-friendly format. I would hope, at the very least they have a print version that you can geo-reference and digitize the depth contours off of. (I searched through many of the ACOE management reports for a bathy map, or reference of, no luck...)

http://www.nwo.usace.army.mil/Missions/DamandLakeProjects/MissouriRiverDams/Garrison.aspx

I would also suggest contacting "Friends of Lake Sakakawea". I work with Lake Association groups and most have this type of information (or at least will point you in the right direction of where to find it).

http://www.lakesakakawea.com/links/

One more option would be to contact the North Dakota Department of Game and Fish. They manage the fishery and need to have knowledge of the bathymetry to effectively accomplish this task. Game and Fish has bathymetric maps for most other lakes...but not this one [http://gfapps.nd.gov/reports/fisheries/WebpageFishingWatersABC.pdf].

http://gf.nd.gov/fishing/fishing-waters

I hope this helps. I am in the process of compiling lakes over a multi-state region and am having mixed results. My biggest data successes are coming from State/Regional Agencies.

share|improve this answer
add comment

Is this any good, USGS site. A simple Google search took me here http://geo-nsdi.er.usgs.gov/catalog/place.php ?

share|improve this answer
    
I found that one too but it does not seem to have any bathymetry data. geo-nsdi.er.usgs.gov/metadata/professional-paper/1625/a/wb/… –  sirgeo Jan 8 '13 at 20:19
add comment

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.