Difference between revisions of "Great Lakes Bathymetry"
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# Choose Filter, then create expression, e.g. "DEPTH" IN ('0', '1', '25', '50', '60')<ref>Geographic Information Systems Stack Exchange. "QGIS choose contour line labels." [https://gis.stackexchange.com/questions/121585/qgis-choose-contour-line-labels Here]</ref> | # Choose Filter, then create expression, e.g. "DEPTH" IN ('0', '1', '25', '50', '60')<ref>Geographic Information Systems Stack Exchange. "QGIS choose contour line labels." [https://gis.stackexchange.com/questions/121585/qgis-choose-contour-line-labels Here]</ref> | ||
{{note|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}} | {{note|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== | |||
[http://apdrc.soest.hawaii.edu/las8/UI.vm#panelHeaderHidden=false;differences=false;autoContour=false;globalMin=-237;globalMax=1667;xCATID=C1354ADCD9A2E42563E67810557FE547;xDSID=etopo1;varid=b_bathy-etopo1;imageSize=auto;over=xy;compute=Nonetoken;catid=C1354ADCD9A2E42563E67810557FE547;dsid=etopo1;varid=b_bathy-etopo1;avarcount=0;xlo=-92.788119178879;xhi=-69.93315874592;ylo=41.247106546728;yhi=49.388349427462;operation_id=Plot_2D_XY_zoom;view=xy;ferret_image_format=gif;ferret_use_graticules=none;ferret_margins=false;ferret_deg_min_sec=false;ferret_contour_style=color_filled_plus_lines;ferret_contour_levels=20 Try this map] with [http://www.instructables.com/id/Lasercut-Bathymetric-Map-of-Arabian-Sea/ these] instructions] | |||
==Other Sources== | ==Other Sources== | ||
* [https://remotesensing.usgs.gov/gallery/ Earth satellite imagery] from USGS, esp. those [https://remotesensing.usgs.gov/gallery/ over time] | * [https://remotesensing.usgs.gov/gallery/ Earth satellite imagery] from USGS, esp. those [https://remotesensing.usgs.gov/gallery/ over time] | ||
* [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. | |||
==References== | ==References== | ||
<references /> | <references /> | ||
Revision as of 21:09, 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.