PDS_VERSION_ID = PDS3 RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 80 OBJECT = TEXT INTERCHANGE_FORMAT = ASCII PUBLICATION_DATE = 1998-03-30 NOTE = "Introduction to this CD-ROM volume." END_OBJECT = TEXT END "LUNAR CONSORTIUM CD ARCHIVE" 1. INTRODUCTION This CD contains a variety of data selected from a collection of data commonly refered to as the Lunar Consortium. This pre- Clementine data set consists of products derived from Apollo, Lunar Orbiter, Galileo, and Zond8 missions. Select data collected from Earth based observations are also included as part of this collection. Compilation of this Lunar Consortium was initially directed by Dr. Philip Davis (now with Earth Information Systems (EISYS) Corporation, Fort Collins, Colorado). Data preparation, documentation generation, and CD design and production was directed by Chris Isbell (United States Geological Survey). See the 'volinfo.txt' file in the 'document' directory for acknowledgment of various people who contributed to data conversion and preparation for this dataset. A Hypertext Markup Language (HTML) file is intended as a user interface to information and data provided on the CD. Using a web browser, such as Netscape or Microsoft Internet Explorer, open the 'index.htm' file located in the 'root' directory of the CD. This HTML document will direct you to informational documents and browse versions of each image data product on the CD. 2. DISK FORMAT This CD has been formatted so that a variety of computer systems (e.g. IBM/PC compatible, Macintosh, Sun) may access the data. Specifically, it is formatted according to the ISO 9660 level 1 Interchange Standard. For further information, refer to the ISO 9660 Standard Document: Reference Number ISO 9660-1988, 15 April 1988. The extended attribute records (XAR) supported by the ISO are not used in this volume series. The lack of XARs on a file affects only the VAX/VMS user community. It will be necessary for VAX/VMS users to use the VMS CONVERT utility to convert document and text files before they can be satisfactorily accessed. 3. FILE FORMATS All document files, detached label files, and tables are stored as ASCII stream-record files. In a stream-record file, records (lines of text) are separated by a carriage-return and line-feed character sequence. The / sequence marks the end-of-record and the start of a new record. This organization works well for the Microsoft-DOS systems because the / sequence is identically used on these systems. On Macintosh systems, the expected end-of- record mark is simply a character. However, Macintosh text editors can read and access the CD text files, but a special- character indicator (usually a "square box" character) will mark the "extraneous" character at the beginning of each line. On UNIX systems, the expected end-of-record mark is simply a character. However, UNIX text editors can read and access the CD text files, but a special-character (usually a ^M sequence) indicator will mark the "extraneous" character at the end of each line. File names with extension "TAB", "LBL", "LAB", "TXT", and "CAT" are formatted as ASCII stream-record files. In addition to the standard ASCII text file format used for documentation files, some documentation files may additionally exist in other forms to facilitate easy access to these files. File names with extension "DOC" are formatted as Microsoft Word Version 6.0 documents. File names with extension "PDF" are formatted as Adobe Portable Document Format (PDF) files. Tabular files are formatted so that they may be read directly into many database management systems of various computers. All fields are separated by commas, and character fields are enclosed in double quotation marks ("). Character fields are left justified, and numeric fields are right justified. The "start byte" and "bytes" values listed in the labels that describe the tabular files do not include the commas between fields or the quotation marks surrounding character fields. The records are of fixed length, and the last two bytes of each record contain the ASCII / characters. This scheme allows a table to be treated as a fixed- length record file on computers that support this file type and as a normal text file on other computers. PDS labels are object-oriented. The object to which the label refers (IMAGE, TABLE, etc.) is denoted by a statement of the form: ^object = location in which the carat character (^) indicates that the object starts at the given location. In an embedded label, the Clementine Base Map image archive uses the form: ^object = n where "n" points to the starting byte location of the object. (The first byte in a file is designated as byte location 1.) For detached labels (labels existing in their own file) the object location is signified as: ^object = "file.nam" In this form, the object of the label description exists in the file named "file.nam". For a description of the PDS object label specifications, consult JPL document D-7669. 4. CD CONTENTS AND DIRECTORY STRUCTURE The files on this CD are organized starting at the root or 'parent' directory. Below the parent directory is a directory tree containing data, documentation, and index files. In the table below directory names are indicated by brackets (<...>), UPPER-CASE letters indicate an actual directory or file name, and lower-case letters indicate the general form of a set of directory or file names. DIRECTORY/FILE CONTENTS ------------------- ------------------------------------------ | |-AAREADME.TXT The file you are reading (ASCII Text). | This file provides introductory information | regarding this CD volume. | |-INDEX.HTM Hypertext Markup Language(HTML) file for use | as a user interface to files on this CD. | |-ERRATA.TXT Description of known anomalies and errors | present on the volume (optional file). | |-VOLDESC.CAT A PDS label description of the contents of | this CD volume in a format readable by | both humans and computers. | |- Catalog Directory ?? | |- Documentation Directory. The files in | | this directory provide detailed | | information regarding this CD. | | | |-DOCINFO.TXT Description of files in the DOCUMENT | | directory. | | | |-VOLINFO.TXT Detailed documentation regarding | | this CD Volume. | | | |-VOLINFO.DOC Microsoft Word V6.0A version of VOLINFO.TXT | | | |-VOLINFO.PDF Adobe-Acrobat Portable Document Format (PDF) | | version of VOLINFO.TXT | | | |-VOLINFO.LBL PDS Label file describing the VOLINFO | documents. | |- Directory for the image index files. | | | |-INDXINFO.TXT Description of files in directory. | | | |-IMGINDX.TAB Image Index table. | | | |-IMGINDX.LBL PDS label for IMGINDX.TAB | |- Data product tree. See VOLINFO files in the | | directory for a detailed list | | of the directory contents. | | | |-DATAINFO.TXT A detailed description of contents. | | | |- Data derived from Apollo missions. | | | |- Data derived from Earth-based observations. | | | |- Digital versions of select Lunar geology maps. | | | |- Data derived from Lunar Orbiter Mission. | | | |- Lunar chemical and mineralogical tables. | | | |- Topographic and control network information. | | | |- Digitized photographs from USSR Zond8 mission. | These 29 photographic based images are | presented in Joint Photographic Expert Group | (JPEG) format. The following describes the | file naming scheme: | | ZONnn_nn.JPG where; | | nn_nn represents a numbering/identification | scheme for each Zond8 photo. The context of | this numbering scheme is unknown by the | producers of this CD. If you have any | input regarding this, please forward any | information to those mentioned in the | "CONTACT" section below. | | |- "Browse" directory containing reduced resolution browse versions of image products provided in the directory tree. 5. CONTACT FOR MORE INFORMATION For details regarding the CD contents or for requesting a copy of this Lunar Consortium CD --------------------------------------------- Support U.S. Geological Survey Astrogeology Team 2255 N. Gemini Dr. Flagstaff, Arizona 86001 astroweb@usgs.gov --- end of AAREADME.TXT -----