returns the height of the viewport in pixels concode_field_sep double DEGREES_PER_RADIAN concode_elem_sep int xCentre concode_elem_sep int DEFAULT_MAP_WIDTH_LONGITUDE concode_elem_sep int viewportWidth concode_elem_sep double minutesPerPixel concode_elem_sep Position centre concode_elem_sep double RADIANS_PER_DEGREE concode_elem_sep int viewportHeight concode_elem_sep int yCentre concode_field_sep void setMinutesPerPixel concode_elem_sep void setViewportWidth concode_elem_sep void setCentre concode_elem_sep void setCentre concode_elem_sep double getMinutesPerPixel concode_elem_sep double findLat concode_elem_sep double findLat concode_elem_sep Position toPosition concode_elem_sep double distance concode_elem_sep int getViewportPixelWidth concode_elem_sep Point getPixelCentre concode_elem_sep double getMetersPerPixel concode_elem_sep void setXCentre concode_elem_sep Position getCentre concode_elem_sep void setYCentre concode_elem_sep void calculateMinutesPerPixel concode_elem_sep Point toPixel concode_elem_sep void setViewportHeight
int function ( ) { return viewportHeight ; }