Mariner AO
From GeoMod
(Redirected from Sailing game)
The object of this program is to create a game that allows users to sail around the world using global wind patterns that are either generated (to allow simplified global circulation patterns) or taken from global data sets.
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Options
- Google Maps: use google maps as the interface for the model.
- Advantages:
- Google maps has excellent maps and a lot of built-in map functions and high resolution.
- Instantly online
- Disadvantages:
- Will have to use JavaScript.
- Will depend on Google keeping the API open and free
- Advantages:
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Sources
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On Google maps
- Google Maps Widgets from Bill Chadwick: http://www.bdcc.co.uk/Gmaps/BdccGmapBits.htm
- Excellent source for good examples using all sorts of SVG and other techniques to overlay the google maps.
- Google Maps API Tutorial: http://www.econym.demon.co.uk/googlemaps/
- Good source of basic information.
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Data Sources
- Surface wind stress: http://dss.ucar.edu/datasets/ds110.1/
- Trenberth, K.E., W.G. Large, and J.G. Olson, 1989: A Global Ocean Wind Stress Climatology Based on ECMWF Analyses. TN-338+STR, National Center for Atmospheric Research, 93 pp.
- Global topography:
- From NGDC: http://www.ngdc.noaa.gov/mgg/bathymetry/relief.html
- ETOPO2v2 Global Gridded 2-minute Database (cell centered): http://www.ngdc.noaa.gov/mgg/global/global.html
- regridded to 2.5 degree grid using GMT (Generic Mapping Tools): http://gmt.soest.hawaii.edu/
- GMT installed using fink.
- Data regridding command:
- > grdsample ETOPO2v2c_f4.nc -I180m -Gworldtopo.grd
- where ETOPO2v2c_f4.nc is the datafile downloaded from NGDC and worldtopo.grd is the output file. 180m is the 2.5 degree cell spacing (m = minutes).
- Converting to ASCII
- > grd2xyz worldtopo.grd > worldtopo.dat
- where worldtopo.dat is the ASCII file in x,y,z format.
- Data regridding command:
- From NGDC: http://www.ngdc.noaa.gov/mgg/bathymetry/relief.html
- Navigation math: Calculate distance, bearing and more between two Latitude/Longitude points by Chris Veness
- http://www.movable-type.co.uk/scripts/latlong.html
- Great page with formulas for getting distances between 2 lat/long coordinates and getting the new lat/long given a starting co-ordinate and a bearing.
