This collection also gives ADL an opportunity to experiment with an additional type of collection. This collection has the following unique characteristics within the ADL environment:
(1) The metadata points to bibliographic objects through citations to published sources such as journal articles, conference papers, government reports, and other published earth science information. These are unique bibliographic records in that they contain point or bounding box representations of their study areas in addition to a full bibliographic record. Within ADL, this set of georeferenced bibliographic records stands in contrast to the online and offline holdings of the ADL Catalog. It gives ADL the opportunity to provide to users not only with datasets and map sets but also pointers to published literature that is 'about' the geographic area specified by the user in a query.
(2) The placenames from the GeoRef Thesaurus that are described with geographic coordinates have been extracted as a set of placenames to add to the new ADL gazetteer. This is a rich set of worldwide earth science placenames that will expand the gazetteer beyond the civic and administrative areas found in the federal government gazetteers which were used to populate the original ADL gazetteer. Loading these records into the new ADL gazetteer will provide an opportunity to further develop and test the ADL Gazetteer Content Standard and the conversion processes to map placename categorization from the original files to the ADL Feature Type Thesaurus. These GeoRef placenames will be added to the gazetteer when staff is available to make the conversion.
(3) A set of 338,730 GeoRef bibliographic records and the GeoRef Thesaurus was given to the University of Arizona Concept Space research project, through ADL, for the purpose of building a concept space of terminology in the earth sciences. This set included 33,019 references with abstracts, entered into GeoRef 1981-1995 and 305,729 references entered into GeoRef 1991-1995 (11,394 of these have abstracts). The progress of this research is reported on elsewhere in this document.
Petroleum Abstracts is produced by the Information Services Division of The University of Tulsa. It contains bibliographic references with abstracts to scientific articles, patents, meeting papers, and government reports of interest to geologists, geophysicists, petroleum engineers, and other technical professionals and managers in the oil and gas exploration and production industry. Subject coverage includes petroleum exploration: geology, geophysics, and geochemistry; development drilling and well completion, servicing, and workovers; petroleum production: recovery, methods, and transportation; and supplemental technology: statistics, environmental/energy-related topics, and alternate fuels and energy sources. Sources for the file include technical periodical publications and patent gazettes, full-copy patents, preprints and proceedings of major technical meetings, and research reports from various government agencies.
Through ADL, Petroleum Abstracts gave a set of 219,831 from 1984-1995 to the University of Arizona for their concept space experiments. The progress of this research is reported on elsewhere in this document.
Dr. R. Douglas Ramsey, Associate Professor, Department of Geography and Earth Resources and Associate Director, Remote Sensing and GIS Laboratory, spent his sabbatical at UCSB in 1997 working on datasets and user interfaces for the Mojave Desert Ecosystem Initiative (http://www.nr.usu.edu/ mojave/home.html). The Mojave Project represents a long-term, joint venture between the DoD, DoI, State and Academic organizations with interests in the Mojave Ecosystem, with the goal of providing access to ``a veritable plethora of natural and cultural resources data that are georeferenced, have a common registration, and cover an entire ecoregion.'' Dr. Ramsey is making the project's dataset and metadata collection available to be added to the ADL. This will include AVHRR, Landsat Multispectral Scanner, and Thematic Mapper scenes. Other datasets include a topographic database, land ownership, cartographic features, climate maps, and a spatially referenced bibliography.
Dr. Ramsey has also provided a set of ecoregion descriptions for the ADL Gazetteer Content Standard format, which he adapted from the work of Robert G. Bailey. These will be loaded into the new ADL gazetteer when staff time is available to do it.
Doug Nebert, Director of the USGS/Federal Geographic Data Committee Geospatial Data Clearinghouse, sent us bounding box coordinates for U.S. states and counties, for countries of the world, and for maps of the USGS topographic map series. The states, counties and countries have been loaded into the new ADL gazetteer; the maps will be loaded when staff time is available.
SCEC is a Science and Technology Center of the National Science Foundation (NSF), which brings scientists together for joint research and problem solving to study the earthquake hazard in Southern California. The SCEC data center contains a variety of educational and scientific information on the study of earthquakes. Information available from SCEC includes public outreach web pages on seismic hazards, Arc-Info coverages of the faults and geology of southern California, graphics from technical reports, and data archives. The data archives include an internet-accessible archive of southern California Earthquakes from 1932 to present, and an archive of processed Global Satellite Positioning (GPS) observations containing over 4000 processed data files. We have been working on unique data sets, which are invaluable to seismic hazards research. The Ventura Basin Study Group data set utilized information from over 800 wells in the Ventura Basin to create one of the best and most complete three-dimensional descriptions of subsurface faults and folds in the at depths of 1 to 5 km in the world. Over 90 cross-sections and contour maps are now available at http://www.crustal.ucsb.edu/hopps. The GTS Corporation seismic reflection study data consists of over 17,000 miles of seismic reflection data covering California. These data are being processed to correct data format problems, incorporate coordinates, and to create browse images.
At present geologists and seismologists use two-dimensional maps to represent three-dimensional information. We have been looking at how to incorporate information from 2-D maps and cross-sections and other data sets in a 3D environment by using VRML. VRML scenes of the Ventura Basin cross-sections, the Northridge earthquake aftershocks, and the Long Valley (Mammoth Lakes) earthquake sequence are available at http://www.crustal.ucsb.edu/ sbgis/vrml.html. Future studies will include the possibility of merging different data sets; i.e. cross-sections and earthquakes.
For the ADL gazetteer, we hope to be able to use perl scripts to reformat ascii data into gazetteer compatible data. Initial data sets provided are list of California Earthquakes from 1687 to present, and a list of Holocene volcanoes. We hope that this collaboration will allow for the incorporation of other geological information, such as geologic plates and plate boundaries, California faults and folds, and impact craters, into the gazetteer. ICS scientists look forward to on-line access to aerial photography, satellite imagery, and the incorporation of references from the GEOREF bibliography.
The purchase of the Ventura Basin Study Group dataset was made possible by USGS National Earthquake Hazards Reduction Program grant #USGS1434HQ97GR0314 to Craig Nicholson and Mark Kammerling. California Earthquakes is from Ellsworth, William L., ``Earthquake History, 1769-1989'' in USGS Professional Paper 1515, Robert E. Wallace, ed.,1990. Holocene Volcanoes is from Smithsonian Institution, Global Volcanism Program.