public void Read(EndianBinaryReader er)
{
er.AssertStringEndian("TERR");
var terrSize = er.ReadUInt32();
er.Position += terrSize;
var something = er.ReadChars(4);
var somethingSize = er.ReadUInt32();
er.Position += somethingSize;
er.AssertStringEndian("CHNK");
var chnkSize = er.ReadInt32();
var tilesBytes = er.ReadBytes(chnkSize);
er.AssertStringEndian("GPNF");
var fnpgSize = er.ReadUInt32();
er.Position += fnpgSize;
er.AssertStringEndian("CMAP");
var cmapSize = er.ReadInt32();
var tilemapBytes = er.ReadBytes(cmapSize);
var heightmapParser = new HeightmapParser(tilemapBytes, tilesBytes);
this.Chunks = heightmapParser.Chunks;
}