Запакованная структура данных первой записи слоя
type TLayerSystemInfoRec = packed record
Version: string[10];
Precision: integer;
flProjection: boolean;
reserved1: integer;
reserved2: integer;
reserved3: word;
LayerID: integer;
flLockForExport: boolean;
StylesIdentificationMode: byte;
StyleLibraryID: integer;
GridWidth: double;
GridHeight: double;
reserved4: array [0..7] of byte;
projectionSize: integer;
end;