oberons 0.0.3

Oberon celestial simulation crate for the MilkyWay SolarSystem workspace
Documentation 
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#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum OberonZone {
    CrateredHighlands,
    ChascataFloor,
    SmoothPlains,
    PolarFrost,
    ImpactBasin,
}

#[derive(Debug, Clone, Copy, PartialEq)]
pub struct SurfaceZone {
    pub zone: OberonZone,
    pub mean_albedo: f64,
    pub regolith_depth_m: f64,
}

pub fn zone_from_lat_lon(latitude_deg: f64, longitude_deg: f64) -> SurfaceZone {
    if latitude_deg.abs() > 60.0 {
        SurfaceZone {
            zone: OberonZone::PolarFrost,
            mean_albedo: 0.30,
            regolith_depth_m: 5.0,
        }
    } else if (-20.0..=0.0).contains(&latitude_deg) && (220.0..=260.0).contains(&longitude_deg) {
        SurfaceZone {
            zone: OberonZone::ChascataFloor,
            mean_albedo: 0.25,
            regolith_depth_m: 8.0,
        }
    } else if (10.0..=30.0).contains(&latitude_deg) && (90.0..=130.0).contains(&longitude_deg) {
        SurfaceZone {
            zone: OberonZone::ImpactBasin,
            mean_albedo: 0.22,
            regolith_depth_m: 15.0,
        }
    } else if longitude_deg > 150.0 {
        SurfaceZone {
            zone: OberonZone::SmoothPlains,
            mean_albedo: 0.24,
            regolith_depth_m: 10.0,
        }
    } else {
        SurfaceZone {
            zone: OberonZone::CrateredHighlands,
            mean_albedo: 0.23,
            regolith_depth_m: 12.0,
        }
    }
}