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Difference between revisions of "ICS"
From ADCIRCWiki
(→Available ICS Values) 

Line 17:  Line 17:  
 Points in the fort.14 are specified in geographic coordinates, which will be projected using the CPP (equidistant) cylindrical mapping by ADCIRC. The curvature of the Earth is not accounted for.   Points in the fort.14 are specified in geographic coordinates, which will be projected using the CPP (equidistant) cylindrical mapping by ADCIRC. The curvature of the Earth is not accounted for.  
    
−   20  +   20 {{ADC versionversion=55relation=eq}} 
 Geographic, Equalarea   Geographic, Equalarea  
 Points in the fort.14 are specified in geographic coordinates, which will be projected using the Equalarea cylindrical mapping by ADCIRC. The curvature of the Earth is correctly accounted for.   Points in the fort.14 are specified in geographic coordinates, which will be projected using the Equalarea cylindrical mapping by ADCIRC. The curvature of the Earth is correctly accounted for.  
    
−   21  +   21 {{ADC versionversion=55relation=eq}} 
 Geographic, CPP   Geographic, CPP  
 Points in the fort.14 are specified in geographic coordinates, which will be projected using the CPP (equidistant) cylindrical mapping by ADCIRC. The curvature of the Earth is correctly accounted for.   Points in the fort.14 are specified in geographic coordinates, which will be projected using the CPP (equidistant) cylindrical mapping by ADCIRC. The curvature of the Earth is correctly accounted for.  
    
−   22  +   22 {{ADC versionversion=55relation=eq}} 
 Geographic, Mercator   Geographic, Mercator  
 Points in the fort.14 are specified in geographic coordinates, which will be projected using the Mercator (conformal) cylindrical mapping by ADCIRC. The curvature of the Earth is correctly accounted for.   Points in the fort.14 are specified in geographic coordinates, which will be projected using the Mercator (conformal) cylindrical mapping by ADCIRC. The curvature of the Earth is correctly accounted for.  
    
−   23  +   23 {{ADC versionversion=55relation=eq}} 
 Geographic, Miller   Geographic, Miller  
 Points in the fort.14 are specified in geographic coordinates, which will be projected using the Miller cylindrical mapping by ADCIRC. The curvature of the Earth is correctly accounted for.   Points in the fort.14 are specified in geographic coordinates, which will be projected using the Miller cylindrical mapping by ADCIRC. The curvature of the Earth is correctly accounted for.  
    
−   24  +   24 {{ADC versionversion=55relation=eq}} 
 Geographic, GallStereographic   Geographic, GallStereographic  
 Points in the fort.14 are specified in geographic coordinates, which will be projected using the GallStereographic cylindrical mapping by ADCIRC. The curvature of the Earth is correctly accounted for.   Points in the fort.14 are specified in geographic coordinates, which will be projected using the GallStereographic cylindrical mapping by ADCIRC. The curvature of the Earth is correctly accounted for.  
}  }  
−  The values 2024 can also be set to a negative value to implement an arbitrary rotation of the geographic coordinates by ADCIRC. This is primarily used to ensure that Earth's poles are rotated onto land to eliminate the singularity in the Spherical coordinate form of the governing equations. ADCIRC's outputs will be displayed on the original unrotated coordinate system.  +  {{ADC versionversion=55relation=eq}}: The values 2024 can also be set to a negative value to implement an arbitrary rotation of the geographic coordinates by ADCIRC. This is primarily used to ensure that Earth's poles are rotated onto land to eliminate the singularity in the Spherical coordinate form of the governing equations. ADCIRC's outputs will be displayed on the original unrotated coordinate system. 
Revision as of 21:01, 22 January 2020
ICS is a fundamental parameter in the fort.15 file that defines the coordinate system and the desired projection. The value of ICS also has an important consequence for the choice of the Coriolis CORI parameter of the fort.15 file.
Available ICS Values
ICS Value  Shortname  Description  

1  Cartesian  Points in the fort.14 are already mapped onto an arbitrary Cartesian coordinate system, e.g., UTM. Also useful for idealized problems.  
2  Geographic, CPP, no curvature  Points in the fort.14 are specified in geographic coordinates, which will be projected using the CPP (equidistant) cylindrical mapping by ADCIRC. The curvature of the Earth is not accounted for.  
20

Geographic, Equalarea  Points in the fort.14 are specified in geographic coordinates, which will be projected using the Equalarea cylindrical mapping by ADCIRC. The curvature of the Earth is correctly accounted for.  
21

Geographic, CPP  Points in the fort.14 are specified in geographic coordinates, which will be projected using the CPP (equidistant) cylindrical mapping by ADCIRC. The curvature of the Earth is correctly accounted for.  
22

Geographic, Mercator  Points in the fort.14 are specified in geographic coordinates, which will be projected using the Mercator (conformal) cylindrical mapping by ADCIRC. The curvature of the Earth is correctly accounted for.  
23

Geographic, Miller  Points in the fort.14 are specified in geographic coordinates, which will be projected using the Miller cylindrical mapping by ADCIRC. The curvature of the Earth is correctly accounted for.  
24

Geographic, GallStereographic  Points in the fort.14 are specified in geographic coordinates, which will be projected using the GallStereographic cylindrical mapping by ADCIRC. The curvature of the Earth is correctly accounted for. 
ADCIRC version:  = 55 
 The values 2024 can also be set to a negative value to implement an arbitrary rotation of the geographic coordinates by ADCIRC. This is primarily used to ensure that Earth's poles are rotated onto land to eliminate the singularity in the Spherical coordinate form of the governing equations. ADCIRC's outputs will be displayed on the original unrotated coordinate system.