20.3 Calculation Specification of the KashBird

KashBird is using following calculation methods

(1) Extracting Latitude, Longitude and Altitude from Elevation Data
(2) Conversion to Geocentric Coordinate System
(3) Datum Conversion
(4) Conversion to Local Coordinate System
(5) Conversion to Eye-point coordinate Sysytem
(6) Projection to the Screen with Z buffer method

Appearance Altitude Calculation
Refraction by air is approximated by equivalent earth radius analogue to the Kashmir.

Distance Calculation
 Hybeny's method

Azimuth Calculation
 Hybeny's method

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