U.S. DEPARTMENT OF COMMERCE NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION NATIONAL ENVIRONMENTAL SATELLITE, DATA, AND INFORMATION SERVICE THE GEODAS BINARY INTEGER XYZ FORMAT - "XYZ03" Compiled By: Dan R. Metzger National Geophysical Data Center Boulder, Colorado February, 2003 INTRODUCTION I GENERAL DESCRIPTION II DATA RECORDS III NGDC CONTACTS APPENDIX A I. INTRODUCTION In 2003 the Marine Geology & Geophysics Division of the National Geophysical Data Center developed a simple, highly efficient format for xyz data. This format can be used for most geospacial potential field data. II. GENERAL DESCRIPTION The XYZ03 Format, is a digital format for the storage of xyz geospacial potential field data.. It is very efficient format in that it is binary and the record size (12 bytes) is small and yet contains latitude and longitude precision sufficient for most users. The format contains no headers and thus no documentation about the data (such as information about references, methods and datums used, etc.). The XYZ03 format can be used for the exchange of xyz data, using virtually any media type. III. DATA RECORDS XYZ03 files consist of a series of binary records. Each record is 12 bytes and consists of 3 fields, each field being a 4-byte binary integer. These fields are longitude, latitude and value as described below. The following is a detailed description of the XYZ03 Data Record fields FIELD NAME NUMBER TYPE DESCRIPTION ________________________________________________________ Longitude 4 Byte Integer Longitude of the point, in millionths of degrees (decimal degrees times 1,000,000).. Latitude 4 Byte Integer Latitude of the point, in millionths of degrees (decimal degrees times 1,000,000). Value 4 Byte Integer Value at the point, in tenths of units. APPENDIX A NGDC CONTACTS Dan Metzger: (303) 497-6542 Dan.R.Metzger@noaa.gov National Geophysical Data Center NOAA, E/GC3 325 Broadway Boulder, CO 80305 TELEX 592811 NOAA MASC BDR FAX (303) 497-6513 ____________________________________________________________