LINQ to SQL query containing joins resulting in class that contains arrays,

Question

I'm currently working on a minecraft-like game. All-terrain data is stored in SQLite. I have 3 tables that should be joined by one SQL Query using LINQ to List theMother. Tables are:

public class Chunks {
    [PrimaryKey]
    public int Id { get; set; }
    [Indexed]
    public double X { get; set; }
    [Indexed]
    public double Y { get; set; }
    public int Resolution { get; set; }
    public float Size { get; set; }
    public bool isBackground { get; set; }
}
public class Cell{
        [PrimaryKey]
        public int Id { get; set; }
        public long GlobalX { get; set; }
        public long GlobalZ { get; set; }
        public long PivotX { get; set; }
        public long PivotZ { get; set; }
        public short Size { get; set; }
        public double Random { get; set; }
        public int ChunkPlotType { get; set; }
        public bool isCommercial { get; set; }
        public bool isFarming { get; set; }
        public int BiomeType { get; set; }
        public short Height { get; set; }
        [Indexed]
        public int ChunkOwnerId { get; set; }
    }
public class Heightmap {//4225 rows for every chunk
    [PrimaryKey]
    public int Id { get; set; }
    [Indexed]
    public int ChunkOwnerId { get; set; }
    public float Height { get; set; }
}
public class TheMotherOfAll {
    public float CoordX;
    public float coordY;
    public Cell[] cells;
    public float[] heightmap;
}

I think the final query should look like this:

public void Load(){
    List<TheMotherOfAll> theMother = new List<TheMotherOfAll>(
    from rowChunks in dbManager.Table<Chunks>()
    join rowCells in dbManager.Table<Cell>()
    where rowChunks.X > 100 && rowChunks.X < 200//for example
    select rowChunks.X as theMother.CoordX, rowChunks.Y as theMother.CoordY
    on rowChunks.id equals rowCells.ChunkOwnerId
    //How to continue I don't know
    )
}