Difference between revisions of "Great Lakes Bathymetry"
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* [http://www.arcgis.com/home/item.html?id=286a578979b34c45ba731a96dcff077a ArcGIS contour map of the Great Lakes] | * [http://www.arcgis.com/home/item.html?id=286a578979b34c45ba731a96dcff077a ArcGIS contour map of the Great Lakes] | ||
* [http://ferret.pmel.noaa.gov/LAS/documentation/las-servers#NOAA Live Access Servers hosted by NOAA/PMEL/TMAP] provide information on air quality, ocean salinity, temperature, etc. | * [http://ferret.pmel.noaa.gov/LAS/documentation/las-servers#NOAA Live Access Servers hosted by NOAA/PMEL/TMAP] provide information on air quality, ocean salinity, temperature, etc. | ||
* [http://gisgeography.com/top-6-free-lidar-data-sources/ LIDAR resources] in case [http://www.instructables.com/id/Gaia-Horizon-3d-Machining-With-LIDAR-Point-Clouds/ we want to machine it]. I want to machine it. | |||
==References== | ==References== | ||
<references /> | <references /> | ||
Revision as of 21:22, 7 June 2017
Ideas
Process of creating a 3D map of the area
Resources
- OceansMap, a well-aggregated set of realtime data about major bodies of water around the world, including the Great Lakes region
- Historical maps from the Army Corps of Engineers
- Portal for Great Lakes Observing System information from the Integrated Ocean Observing system
- Downloadable Great Lakes bathymetric maps from NOAA
- Google maps
- Further information from the Great Lakes Information Network
- The National Map combines many of the above resources
- The USGS Earth Explorer is easier to use than the above, but requires a login and download client
Workflow
- Download shapefiles from Natural Earth or other files from NOAA. Superior bathymetry with lower (resolution?) is available here, with login
- Download and install QGIS and Inkscape[1]
- Open with QGIS Desktop, realize the data is only for oceans...
- Download bathymetry information from each lake from NOAA here
- No need to extract files, open each in QGIS Desktop
- Add OpenStreetMap information (not working at this time, probably missed a step)
- Right-click shapefile in left layers panel, select Properties
- Choose Filter, then create expression, e.g. "DEPTH" IN ('0', '1', '25', '50', '60')[2]
It is helpful to use the Values box (make sure "Use unfiltered layer" is checked if changing an applied filter) to see the extent of the map
Workflow Take 2
Try this map with these instructions]
Other Sources
- Earth satellite imagery from USGS, esp. those over time
- ArcGIS contour map of the Great Lakes
- Live Access Servers hosted by NOAA/PMEL/TMAP provide information on air quality, ocean salinity, temperature, etc.
- LIDAR resources in case we want to machine it. I want to machine it.