Open-File Report 97-470G
|This report is preliminary and has not been reviewed
for conformity with U. S. Geological Survey editorial standards and stratigraphic
nomenclature. Any use of trade names is for descriptive purposes only and
does not imply endorsement by the U. S. government.
This Open File Report is available on CD-ROM. Please contact Christa Lopez. Click HERE to view contents.
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Table of Contents
View the Interactive Map (by ESRI, ArcIMS Copyright(C)1992-2002)
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II. Data processing steps
The projection information written on the original map is ".. adjusted from Polyconic
Projection of International 1:1000000 Map of the Earth". Because such projection is not
directly supported by ESRI's ARC/INFO software, it was necessary to georeference the map
to the one of known projections. This was done as follows:
1. The latitude/longitude grid with cell size 2 * 2 degrees was projected to Lambert Conformal Conic projection and then used to create ARC/INFO point coverage. That point coverage was used to create "to - from" links by ARC/INFO CONTROLPOINTS program.
2. A gray-scale scanned image of the original paper map was transformed to Lambert Conformal Conic projection by ARC/INFO GRIDWARP program (polynomial of the second order) using the "to - from" links created by CONTROLPOINTS program.
3. Geologic polygon boundaries from the source map were initially transfered to mylar and then scanned to produce a binary image.
4. The binary image from step 3 with geologic boundaries was vectorized by ARC/INFO GRIDLINE utility and then supplemented by hands-on digitization.
5. Polygon boundaries and geologic attributing of the ARC/INFO coverage from step 4 were verified and corrected by using gray-scale image from step 2 as a background guide.
6. A series of piecewise "rubbersheet" transformations was applied to the final ARC/INFO coverage. The ARC/INFO coverages that were used for transformation were ESRI's ArcWorld 1:3M GIS cartographic layers (RIV3M, CTRY3M). Overall RMS error of that transformation is equal to 1,500 meters (0.6 mm on original paper map).
Alsharhan,A.S., and Nairn, A.E.M., 1997, Sedimentary Basins and Petroleum Geology of the Middle East, Elseveir, Amsterdam, 942 p ..
Beydoun,Z.R., 1991, Arabian plate hydrocarbon geology and potential -- A plate tectonic approach: Amer. Assoc. Petrol. Geologists, Studies in Geology 33, 77 p.
Environmental Systems Research Institute,Inc.,1992, ArcWorld 1:3M, Environmental System Research Institute (ESRI). Digital database available from ESRI, 380 New York Street, Redlands, CA 92373-8100.
Haghipour,A., and Aghanabati,A (compilers),1985, Geologic Map of Iran: Ministry of Mines and Metals, Geological Survey of Iran, one plate.
International Geologic Map of Africa, 1959, Plate 3, 1:5,000,000, International Geologic Congress, Association of Geologic Services of Africa, Paris, France.
Klett, T.R., Ahlbrandt T.S., Schmoker, J.W., and Dolton, G.L., 1997, Ranking of World's oil and gas provinces by known petroleum volume: U.S. Geological Survey Open File Report 97-463, one CD-ROM.
Petroconsultants, 1996, Petroleum exploration and production database: Petroconsultants, Inc., Houston, Texas (database available from Petroconsultants, Inc., P.O. Box 740619, Houston, Texas 77274-0619).
Pollastro R.M., Karshbaum A.S, and Viger R.J. , 1998, Map showing geology, oil and gas fields, and geologic provinces of the Arabian peninsula: U.S. Geological Survey Open File Report 97-470B, one CD-ROM.
Persits F.M., Ulmishek G.F., and D.W. Steinshouer., 1997, Map showing geology, oil and gas
fields, and geologic provinces of the Former Soviet Union:
U.S. Geological Survey Open File Report 97-470E, one CD-ROM.
1U.S. Geological Survey, Denver, CO
2Contractor to the U.S. Geological Survey, Denver, CO
U. S. Geological Survey Open-File Report 97-470G