GEOREF


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georef

[′jē·ō‚ref]

GEOREF

GEOREFclick for a larger image
A worldwide position reference system that may be applied to any map or chart graduated in latitude and longitude (with Greenwich as the prime meridian), regardless of projection. It is a method of expressing latitude and longitude in a form suitable for rapid reporting and plotting. This term is derived from the words The World Geographic Reference System. The system is based on the division of the entire earth surface into a number of quadrangles and subquadrangles. The first division is into twenty-four longitudinal zones, each 15° wide. They are lettered A to Z, omitting I and O, and begin eastward from the 180° meridian. Similarly, the earth is divided into twelve latitudinal bands, each 15° wide. They are lettered A to M, omitting I. The letters begin northward from the South Pole. Each 15° quadrangle is further subdivided into fifteen 1° longitudinal zones and 1° latitudinal bands, lettered A to Q, omitting I and O. They run east and north, respectively, from the southwest corner of the 15° quadrangle. Each of the subquadrangles is identified by means of four letters. The first two letters identify the 15° quadrangle, the third letter the 1° zone of longitude, and the fourth letter the 1° band of latitude. The 1° quadrangles are further divided into sixty longitudinal zones and sixty bands of latitude—each 1 min of arc. Any place in this 1-min quadrangle is identified by quoting four letters and four numerals. The four letters denote the 1° quadrangle: the first two numerals, denote the eastward minutes; and the remaining two numerals, the northern latitudinal position. In practice, where the risk of ambiguity with a neighboring 15° quadrangle is unlikely, the first two letters of the reference may be dropped.
References in periodicals archive ?
New entries will be part of GeoRef, but CanGeoRef itself will be available as a separate subset at a much lower price than GeoRef, thus making it attractive to a much larger market that includes smaller companies and other user groups seeking only Canadian geo-science literature.
The Journal is indexed selectively (but consistently) by CAB International databases, GeoRef, ProceedingsFirst and Zoological Record.
Geography, NMU Major center for public GIS Stored on CDs TABLE 2 Parameters Used in Michigan GeoRef Coordinate System Projection Oblique Mercator Datum NAD83 Ellipsoid GRS80 Units Meters Scale factor at projection's 0.9996 center Longitude of projection's origin 86[degrees] 00' 00" W Latitude of projection's origin 45[degrees] 18' 33" N Azimuth at center of projection 337.25556[degrees] False easting 2546731.496 False northing -4354009.816 Source: http://www.dnr.state.mi.us/spatialdatalibrary/
Cada nivel coincide con una de las letras del correspondiente al identificador GEOREF del tile.
where DB = {INSPEC, COMPENDEX, ABI, GEOREF, ERIC, PSYCINFO}.
GeoRef In Process mostly contains non-English-language literature, much of which was not published recently.
Title Number of SAS Titles State Academies of Science 40 Abstracts GeoRef 34 Zoological Record 34 Chemical Abstracts 25 BIOSIS 19 CAB Abstracts 16 Selected Water Resources Abstracts 15 Agricola 4 Science Citation Index 4 Zentralblatt fur Mathematik 4 Inspec 3 ISTP: Index to Scientific & 2 Technical Proceedings Mathematical Reviews 2 Compendex 1 Medline 1 Wilson Indexes 1 Table 2.
FIGURE 1 Subject Content of 1997 Articles Life Sciences 54.9% Physical Sciences 26.6% Applied Sciences 8.3% Science Education 6.6% Other 3.6% Note: Table made from pie chart FIGURE 2 Indexing and Abstracting Sources Title Number of SAS Titles State Academies of 40 Science Abstracts GeoRef 34 Zoological Record 34 Chemical Abstracts 25 BIOSIS 19 CAB Abstracts 16 Selected Water Resources 15 Abstracts Agricola 4 Science Citation index 4 Zentralblatt fur Mathematik 4 Inspec 3 ISTP: Index to Scientific & 2 Technical Proceedings Mathematical Reviews 2 Compendex 1 Medline 1 Wilson Indexes 1 FIGURE 3 Impact Factors and Citations Title 1994 1995 1996 Average Avg.
Cambridge Scientific Abstracts (CSA) has announced that the GeoRef database, published by the American Geological Institute, is now available via its Internet Database Service (IDS).
While the number of available databases via FirstSearch varies slightly from year to year, we now have unlimited access to some 60 databases with at least 13 of those relevant to this field: Agricola, Applied Science and Technology Index, BasicBiosis, Biological/Agricultural Index, CAS-StudentEdition (Chemistry), Contents1st (Table-of-Contents Service), Dissertation Abstracts, Environmental Science and Pollution Management, Geobase, Georef (Geosciences), GPO, and Worldcat.
become available, rocks that had previously been assigned to the Archean might become Proterozoic or vice versa." He also casts serious doubt on the value of the IUGS-ratified period system for the Proterozoic; his search of the Georef database for "Ectasian" or "Calymmian" yielded zero results; as Bleeker comments, "Precambrian stratigraphers are simply ignoring the formal terminology for ...
According to the announcement, GeoRef is the most comprehensive database in the geosciences, with over 2.2 million references to geoscience journal articles, books, maps, conference papers, reports, and theses published as far back as 1785 (including references to all publications of the U.S.