序号类别格式字节数必须las版本备注1File Signature (“LASF”)char[4]4*1.1~1.42File Source IDunsigned short2*3Global Encodingunsigned short2*4Project ID - GUID data 1unsigned long45Project ID - GUID data 2unsigned short26Project ID - GUID data 3unsigned short27Project ID - GUID data 4unsigned char[8]88Version Majorunsigned char1*1.1~1.49Version Minorunsigned char1*1.1~1.410System Identifierchar[32]32*11Generating Softwarechar[32]32*12File Creation Day of Yearunsigned short2*13File Creation Yearunsigned short214Header Sizeunsigned short215Offset to point dataunsigned long4*16Number of Variable Length Recordsunsigned long4*17Point Data Format ID (0-99 for spec)unsigned char1*18Point Data Record Lengthunsigned short2*19Number of point recordsunsigned long4*20Number of points by returnunsigned long[5]20*21X scale factordouble8*1.1~1.422Y scale factordouble8*1.1~1.423Z scale factordouble8*1.1~1.424X offsetdouble8*1.1~1.425Y offsetdouble8*1.1~1.426Z offsetdouble8*1.1~1.427Max Xdouble8*1.1~1.428Min Xdouble8*1.1~1.429Max Ydouble8*1.1~1.430Min Ydouble8*1.1~1.431Max Zdouble8*1.1~1.432Min Zdouble8*1.1~1.4