USGS Geoscience Data Catalog
Additional USGS Geoscience data can be found by geographic location or by publication series.
U.S. Geological Survey, 2003, Maps showing geology, oil and gas fields, and geologic provinces of the Arctic: U.S. Geological Survey Open-File Report 97-470J, U.S. Geological Survey, Central Energy Resources Team, Denver, Colorado.Online Links:
This is a Vector data set.
The map projection used is Polar Stereographic.
Planar coordinates are encoded using coordinate pair
Abscissae (x-coordinates) are specified to the nearest 0.008192
Ordinates (y-coordinates) are specified to the nearest 0.008192
Planar coordinates are specified in meters
The horizontal datum used is D_Clarke_1866.
The ellipsoid used is Clarke 1866.
The semi-major axis of the ellipsoid used is 6378206.4.
The flattening of the ellipsoid used is 1/294.98.
Value | Definition |
---|---|
Q | Quaternary |
N-Q | Neogene and Quaternary |
N2-Q | Pliocene to Quaternary |
N2-Q1 | Pliocene to lower Quaternary |
N | Neogene |
N2 | Pliocene |
N1 | Miocene |
Pg-N | Paleogene and Neogene |
Pg3-Q | Oligocene to Quaternary |
Pg3-N1 | Oligocene to Miocene |
Pg2-N | Eocene to Neogene |
Pg2-N1 | Eocene to Miocene |
Pg | Paleogene |
Pg3 | Oligocene |
Pg23 | Eocene and Oligocene |
Pg2 | Eocene |
Pg12 | Paleocene and Eocene |
Pg1 | Paleocene |
Mz | Mesozoic |
K2-Pg | Upper Cretaceous and Paleogene |
K1-Pg | Lower Cretaceous to Paleogene |
K2-Pg1 | Upper Cretaceous to Paleocene |
K1-Pg1 | Lower Cretaceous to Paleocene |
K | Cretaceous |
K2 | Upper Cretaceous |
K1 | Lower Cretaceous |
J-K | Jurassic and Cretaceous |
J-K1 | Jurassic to Lower Cretaceous |
J3-K1 | Upper Jurassic to Lower Cretaceous |
J | Jurassic |
J3 | Upper Jurassic |
J23 | Middle and Upper Jurasssic |
J2 | Middle Jurassic |
J12 | Lower and Middle Jurasssic |
J1 | Lower Jurassic |
Tr-J | Triassic and Jurassic |
Tr3-J1 | Upper Triassic to Lower Jurassic |
Tr | Triassic |
Tr3 | Upper Triassic |
Tr23 | Middle and Upper Triassic |
Tr2 | Middle Triassic |
Tr12 | Lower and MiddleTriassic |
Tr1 | Lower Triassic |
Pz-Mz | Paleozoic and Mesozoic |
Pz2-Tr | Upper Paleozoic to Triassic |
Pz | Paleozoic |
P-J | Permian to Jurassic |
P-Tr | Permian to Triassic |
P2-Tr | Upper Permian to Triassic |
P | Permian |
P2 | Upper Permian |
P1 | Lower Permian |
C-P | Carboniferous and Permian |
C2-P1 | Upper Carboniferous to Lower Permian |
C-P1 | Carboniferous to Lower Permian |
C-J | Carboniferous to Jurassic |
C-Tr | Carboniferous to Triassic |
C | Carboniferous |
C2 | Upper Carboniferous |
C1 | Lower Carboniferous |
D-C | Devonian and Carboniferous |
D3-C | Upper Devonian to Carboniferous |
D-C1 | Devonian to Lower Carboniferous |
D | Devonian |
D3 | Upper Devonian |
D23 | Middle and Upper Devonian |
D2 | Middle Devonian |
D12 | Lower and Middle Devonian |
D1 | Lower Devonian |
Pz1 | Lower Paleozoic |
S-D | Silurian and Devonian |
S | Silurian |
S2 | Upper Silurian |
S1 | Lower Silurian |
O-D | Ordovician to Devonian |
O-S | Ordovician and Silurian |
O | Ordovician |
O23 | Middle and Upper Ordovician |
O1 | Lower Ordovician |
Cm-D | Cambrian to Devonian |
Cm-S | Cambrian to Silurian |
Cm-O | Cambrian and Ordovician |
Cm | Cambrian |
Cm3 | Upper Cambrian |
Cm23 | Middle and Upper Cambrian |
Cm2 | Middle Cambrian |
Cm12 | Lower and Middle Cambrian |
Cm1 | Lower Cambrian |
Pr-Pz1 | Proterozoic to lower Paleozoic |
Pr3-Pz1 | Upper Proterozoic to lower Paleozoic |
Pr3-S | Upper Proterozoic to Silurian |
Pr-Cm | Proterozoic to Cambrian |
Pr3-Cm | Upper Proterozoic to Cambrian |
Pr23-Cm | Middle and Upper Proterozoic to Cambrian |
Pr3 | Upper Proterozoic |
Pr23 | Middle and Upper Proterozoic |
Pr2 | Middle Proterozoic |
Pr12 | Lower and Middle Proterozoic |
Pr1 | Lower Proterozoic |
Ar-Pr | Archean and Proterozoic |
Ar-Pr1 | Archean and Lower Proterozoic |
Ar | Archean |
Ice |
Value | Definition |
---|---|
Ar | Archean |
Ar-Pr | Archean and Proterozoic |
C | Carboniferous |
C-J | Carboniferous to Jurassic |
C-P | Carboniferous and Permian |
C-Tr | Carboniferous to Triassic |
Cm | Cambrian |
Cm-D | Cambrian to Devonian |
Cm-O | Cambrian and Ordovician |
Cm-S | Cambrian to Silurian |
Cz | Cenozoic |
D | Devonian |
D-C | Devonian and Carboniferous |
Ice | |
J | Jurassic |
J-K | Jurassic and Cretaceous |
K | Cretaceous |
K-T | Cretaceous and Tertiary |
Mz | Mwsozoic |
O | Ordovician |
O-D | Ordovician to Devonian |
O-S | Ordovician and Silurian |
P | Permian |
P-J | Permian to Jurassic |
P-Tr | Permian to Triassic |
Pr | Proterozoic |
Pr-Cm | Proterozoic to Cambrian |
Pr-Pz | Proterozoic to Paleozoic |
Pr-S | Proterozoic to Silurian |
Pz | Paleozoic |
Pz-Mz | Paleozoic and Mesozoic |
Pz-Tr | Paleozoic to Triassic |
Q | Quaternary |
S | Silurian |
S-D | Silurian to Devonian |
T | Tertiary |
Value | Definition |
---|---|
4 | done |
Value | Definition |
---|---|
alkaline | |
basic | |
diorite | |
granite | |
granodiorite | |
sed | sedimentary |
syenogranite | |
ultramafic | |
volcanic |
Value | Definition |
---|---|
off | offshore |
on | onshore |
Value | Definition |
---|---|
Y | geologic age uncertain |
Value | Definition |
---|---|
Y | error in color, pattern or revealed by external source |
Value | Definition |
---|---|
Q | Quaternary |
N-Q | Neogene and Quaternary |
N2-Q | Pliocene to Quaternary |
N2-Q1 | Pliocene to lower Quaternary |
N | Neogene |
N2 | Pliocene |
N1 | Miocene |
Pg-N | Paleogene and Neogene |
Pg3-Q | Oligocene to Quaternary |
Pg3-N1 | Oligocene to Miocene |
Pg2-N | Eocene to Neogene |
Pg2-N1 | Eocene to Miocene |
Pg | Paleogene |
Pg3 | Oligocene |
Pg23 | Eocene and Oligocene |
Pg2 | Eocene |
Pg12 | Paleocene and Eocene |
Pg1 | Paleocene |
Mz | Mesozoic |
K2-Pg | Upper Cretaceous and Paleogene |
K1-Pg | Lower Cretaceous to Paleogene |
K2-Pg1 | Upper Cretaceous to Paleocene |
K1-Pg1 | Lower Cretaceous to Paleocene |
K | Cretaceous |
K2 | Upper Cretaceous |
K1 | Lower Cretaceous |
J-K | Jurassic and Cretaceous |
J-K1 | Jurassic to Lower Cretaceous |
J3-K1 | Upper Jurassic to Lower Cretaceous |
J | Jurassic |
J3 | Upper Jurassic |
J23 | Middle and Upper Jurasssic |
J2 | Middle Jurassic |
J12 | Lower and Middle Jurasssic |
J1 | Lower Jurassic |
Tr-J | Triassic and Jurassic |
Tr3-J1 | Upper Triassic to Lower Jurassic |
Tr | Triassic |
Tr3 | Upper Triassic |
Tr23 | Middle and Upper Triassic |
Tr2 | Middle Triassic |
Tr12 | Lower and MiddleTriassic |
Tr1 | Lower Triassic |
Pz-Mz | Paleozoic and Mesozoic |
Pz2-Tr | Upper Paleozoic to Triassic |
Pz | Paleozoic |
P-J | Permian to Jurassic |
P-Tr | Permian to Triassic |
P2-Tr | Upper Permian to Triassic |
P | Permian |
P2 | Upper Permian |
P1 | Lower Permian |
C-P | Carboniferous and Permian |
C2-P1 | Upper Carboniferous to Lower Permian |
C-P1 | Carboniferous to Lower Permian |
C-J | Carboniferous to Jurassic |
C-Tr | Carboniferous to Triassic |
C | Carboniferous |
C2 | Upper Carboniferous |
C1 | Lower Carboniferous |
D-C | Devonian and Carboniferous |
D3-C | Upper Devonian to Carboniferous |
D-C1 | Devonian to Lower Carboniferous |
D | Devonian |
D3 | Upper Devonian |
D23 | Middle and Upper Devonian |
D2 | Middle Devonian |
D12 | Lower and Middle Devonian |
D1 | Lower Devonian |
Pz1 | Lower Paleozoic |
S-D | Silurian and Devonian |
S | Silurian |
S2 | Upper Silurian |
S1 | Lower Silurian |
O-D | Ordovician to Devonian |
O-S | Ordovician and Silurian |
O | Ordovician |
O23 | Middle and Upper Ordovician |
O1 | Lower Ordovician |
Cm-D | Cambrian to Devonian |
Cm-S | Cambrian to Silurian |
Cm-O | Cambrian and Ordovician |
Cm | Cambrian |
Cm3 | Upper Cambrian |
Cm23 | Middle and Upper Cambrian |
Cm2 | Middle Cambrian |
Cm12 | Lower and Middle Cambrian |
Cm1 | Lower Cambrian |
Pr-Pz1 | Proterozoic to lower Paleozoic |
Pr3-Pz1 | Upper Proterozoic to lower Paleozoic |
Pr3-S | Upper Proterozoic to Silurian |
Pr-Cm | Proterozoic to Cambrian |
Pr3-Cm | Upper Proterozoic to Cambrian |
Pr23-Cm | Middle and Upper Proterozoic to Cambrian |
Pr3 | Upper Proterozoic |
Pr23 | Middle and Upper Proterozoic |
Pr2 | Middle Proterozoic |
Pr12 | Lower and Middle Proterozoic |
Pr1 | Lower Proterozoic |
Ar-Pr | Archean and Proterozoic |
Ar-Pr1 | Archean and Lower Proterozoic |
Ar | Archean |
Ice |
Value | Definition |
---|---|
excel | excellent |
good | |
mult | several polygons on Geological Map of Canada match one polygon on Arctic map |
none | |
part | partial matching |
poor |
same abbreviations as AGE_OR
Value | Definition |
---|---|
basic | |
diorite | |
granite | |
metamorphic | |
sed | sedimentary |
syenogranite | |
volcanic |
Value | Definition |
---|---|
Detachment fault | |
Facies Contact | |
Fault | |
Shore | |
Spreading Center | |
Strike-slip fault | |
Thrust Fault |
Value | Definition |
---|---|
0 | needs correction |
4 | final |
Value | Definition |
---|---|
off | offshore |
on | onshore |
s | shoreline |
Range of values | |
---|---|
Minimum: | 0 |
Maximum: | 92 |
Value | Definition |
---|---|
Gas | |
Gas and condensate | |
Gas and oil | |
Gas, condensate and oil | |
Oil | |
Oil and gas | |
Oil, gas and condensate |
Value | Definition |
---|---|
Q | Quaternary |
N-Q | Neogene and Quaternary |
N2-Q | Pliocene to Quaternary |
N2-Q1 | Pliocene to lower Quaternary |
N | Neogene |
N2 | Pliocene |
N1 | Miocene |
Pg-N | Paleogene and Neogene |
Pg3-Q | Oligocene to Quaternary |
Pg3-N1 | Oligocene to Miocene |
Pg2-N | Eocene to Neogene |
Pg2-N1 | Eocene to Miocene |
Pg | Paleogene |
Pg3 | Oligocene |
Pg23 | Eocene and Oligocene |
Pg2 | Eocene |
Pg12 | Paleocene and Eocene |
Pg1 | Paleocene |
Mz | Mesozoic |
K2-Pg | Upper Cretaceous and Paleogene |
K1-Pg | Lower Cretaceous to Paleogene |
K2-Pg1 | Upper Cretaceous to Paleocene |
K1-Pg1 | Lower Cretaceous to Paleocene |
K | Cretaceous |
K2 | Upper Cretaceous |
K1 | Lower Cretaceous |
J-K | Jurassic and Cretaceous |
J-K1 | Jurassic to Lower Cretaceous |
J3-K1 | Upper Jurassic to Lower Cretaceous |
J | Jurassic |
J3 | Upper Jurassic |
J23 | Middle and Upper Jurasssic |
J2 | Middle Jurassic |
J12 | Lower and Middle Jurasssic |
J1 | Lower Jurassic |
Tr-J | Triassic and Jurassic |
Tr3-J1 | Upper Triassic to Lower Jurassic |
Tr | Triassic |
Tr3 | Upper Triassic |
Tr23 | Middle and Upper Triassic |
Tr2 | Middle Triassic |
Tr12 | Lower and MiddleTriassic |
Tr1 | Lower Triassic |
Pz-Mz | Paleozoic and Mesozoic |
Pz2-Tr | Upper Paleozoic to Triassic |
Pz | Paleozoic |
P-J | Permian to Jurassic |
P-Tr | Permian to Triassic |
P2-Tr | Upper Permian to Triassic |
P | Permian |
P2 | Upper Permian |
P1 | Lower Permian |
C-P | Carboniferous and Permian |
C2-P1 | Upper Carboniferous to Lower Permian |
C-P1 | Carboniferous to Lower Permian |
C-J | Carboniferous to Jurassic |
C-Tr | Carboniferous to Triassic |
C | Carboniferous |
C2 | Upper Carboniferous |
C1 | Lower Carboniferous |
D-C | Devonian and Carboniferous |
D3-C | Upper Devonian to Carboniferous |
D-C1 | Devonian to Lower Carboniferous |
D | Devonian |
D3 | Upper Devonian |
D23 | Middle and Upper Devonian |
D2 | Middle Devonian |
D12 | Lower and Middle Devonian |
D1 | Lower Devonian |
Pz1 | Lower Paleozoic |
S-D | Silurian and Devonian |
S | Silurian |
S2 | Upper Silurian |
S1 | Lower Silurian |
O-D | Ordovician to Devonian |
O-S | Ordovician and Silurian |
O | Ordovician |
O23 | Middle and Upper Ordovician |
O1 | Lower Ordovician |
Cm-D | Cambrian to Devonian |
Cm-S | Cambrian to Silurian |
Cm-O | Cambrian and Ordovician |
Cm | Cambrian |
Cm3 | Upper Cambrian |
Cm23 | Middle and Upper Cambrian |
Cm2 | Middle Cambrian |
Cm12 | Lower and Middle Cambrian |
Cm1 | Lower Cambrian |
Pr-Pz1 | Proterozoic to lower Paleozoic |
Pr3-Pz1 | Upper Proterozoic to lower Paleozoic |
Pr3-S | Upper Proterozoic to Silurian |
Pr-Cm | Proterozoic to Cambrian |
Pr3-Cm | Upper Proterozoic to Cambrian |
Pr23-Cm | Middle and Upper Proterozoic to Cambrian |
Pr3 | Upper Proterozoic |
Pr23 | Middle and Upper Proterozoic |
Pr2 | Middle Proterozoic |
Pr12 | Lower and Middle Proterozoic |
Pr1 | Lower Proterozoic |
Ar-Pr | Archean and Proterozoic |
Ar-Pr1 | Archean and Lower Proterozoic |
Ar | Archean |
Ice |
Value | Definition |
---|---|
Ar | Archean |
Ar-Pr | Archean and Proterozoic |
C | Carboniferous |
C-J | Carboniferous to Jurassic |
C-P | Carboniferous and Permian |
C-Tr | Carboniferous to Triassic |
Cm | Cambrian |
Cm-D | Cambrian to Devonian |
Cm-O | Cambrian and Ordovician |
Cm-S | Cambrian to Silurian |
Cz | Cenozoic |
D | Devonian |
D-C | Devonian and Carboniferous |
Ice | |
J | Jurassic |
J-K | Jurassic and Cretaceous |
K | Cretaceous |
K-T | Cretaceous and Tertiary |
Mz | Mwsozoic |
O | Ordovician |
O-D | Ordovician to Devonian |
O-S | Ordovician and Silurian |
P | Permian |
P-J | Permian to Jurassic |
P-Tr | Permian to Triassic |
Pr | Proterozoic |
Pr-Cm | Proterozoic to Cambrian |
Pr-Pz | Proterozoic to Paleozoic |
Pr-S | Proterozoic to Silurian |
Pz | Paleozoic |
Pz-Mz | Paleozoic and Mesozoic |
Pz-Tr | Paleozoic to Triassic |
Q | Quaternary |
S | Silurian |
S-D | Silurian to Devonian |
T | Tertiary |
Value | Definition |
---|---|
4 | done |
Value | Definition |
---|---|
alkaline | |
basic | |
diorite | |
granite | |
granodiorite | |
sed | sedimentary |
syenogranite | |
ultramafic | |
volcanic |
Value | Definition |
---|---|
on | onshore |
Value | Definition |
---|---|
Y | geologic age uncertain |
Value | Definition |
---|---|
Y | error in color, pattern or revealed by external source |
Value | Definition |
---|---|
Q | Quaternary |
N-Q | Neogene and Quaternary |
N2-Q | Pliocene to Quaternary |
N2-Q1 | Pliocene to lower Quaternary |
N | Neogene |
N2 | Pliocene |
N1 | Miocene |
Pg-N | Paleogene and Neogene |
Pg3-Q | Oligocene to Quaternary |
Pg3-N1 | Oligocene to Miocene |
Pg2-N | Eocene to Neogene |
Pg2-N1 | Eocene to Miocene |
Pg | Paleogene |
Pg3 | Oligocene |
Pg23 | Eocene and Oligocene |
Pg2 | Eocene |
Pg12 | Paleocene and Eocene |
Pg1 | Paleocene |
Mz | Mesozoic |
K2-Pg | Upper Cretaceous and Paleogene |
K1-Pg | Lower Cretaceous to Paleogene |
K2-Pg1 | Upper Cretaceous to Paleocene |
K1-Pg1 | Lower Cretaceous to Paleocene |
K | Cretaceous |
K2 | Upper Cretaceous |
K1 | Lower Cretaceous |
J-K | Jurassic and Cretaceous |
J-K1 | Jurassic to Lower Cretaceous |
J3-K1 | Upper Jurassic to Lower Cretaceous |
J | Jurassic |
J3 | Upper Jurassic |
J23 | Middle and Upper Jurasssic |
J2 | Middle Jurassic |
J12 | Lower and Middle Jurasssic |
J1 | Lower Jurassic |
Tr-J | Triassic and Jurassic |
Tr3-J1 | Upper Triassic to Lower Jurassic |
Tr | Triassic |
Tr3 | Upper Triassic |
Tr23 | Middle and Upper Triassic |
Tr2 | Middle Triassic |
Tr12 | Lower and MiddleTriassic |
Tr1 | Lower Triassic |
Pz-Mz | Paleozoic and Mesozoic |
Pz2-Tr | Upper Paleozoic to Triassic |
Pz | Paleozoic |
P-J | Permian to Jurassic |
P-Tr | Permian to Triassic |
P2-Tr | Upper Permian to Triassic |
P | Permian |
P2 | Upper Permian |
P1 | Lower Permian |
C-P | Carboniferous and Permian |
C2-P1 | Upper Carboniferous to Lower Permian |
C-P1 | Carboniferous to Lower Permian |
C-J | Carboniferous to Jurassic |
C-Tr | Carboniferous to Triassic |
C | Carboniferous |
C2 | Upper Carboniferous |
C1 | Lower Carboniferous |
D-C | Devonian and Carboniferous |
D3-C | Upper Devonian to Carboniferous |
D-C1 | Devonian to Lower Carboniferous |
D | Devonian |
D3 | Upper Devonian |
D23 | Middle and Upper Devonian |
D2 | Middle Devonian |
D12 | Lower and Middle Devonian |
D1 | Lower Devonian |
Pz1 | Lower Paleozoic |
S-D | Silurian and Devonian |
S | Silurian |
S2 | Upper Silurian |
S1 | Lower Silurian |
O-D | Ordovician to Devonian |
O-S | Ordovician and Silurian |
O | Ordovician |
O23 | Middle and Upper Ordovician |
O1 | Lower Ordovician |
Cm-D | Cambrian to Devonian |
Cm-S | Cambrian to Silurian |
Cm-O | Cambrian and Ordovician |
Cm | Cambrian |
Cm3 | Upper Cambrian |
Cm23 | Middle and Upper Cambrian |
Cm2 | Middle Cambrian |
Cm12 | Lower and Middle Cambrian |
Cm1 | Lower Cambrian |
Pr-Pz1 | Proterozoic to lower Paleozoic |
Pr3-Pz1 | Upper Proterozoic to lower Paleozoic |
Pr3-S | Upper Proterozoic to Silurian |
Pr-Cm | Proterozoic to Cambrian |
Pr3-Cm | Upper Proterozoic to Cambrian |
Pr23-Cm | Middle and Upper Proterozoic to Cambrian |
Pr3 | Upper Proterozoic |
Pr23 | Middle and Upper Proterozoic |
Pr2 | Middle Proterozoic |
Pr12 | Lower and Middle Proterozoic |
Pr1 | Lower Proterozoic |
Ar-Pr | Archean and Proterozoic |
Ar-Pr1 | Archean and Lower Proterozoic |
Ar | Archean |
Ice |
Value | Definition |
---|---|
excel | excellent |
good | |
mult | several polygons on Geological Map of Canada match one polygon on Arctic map |
none | |
part | partial matching |
poor |
same abbreviations as AGE_OR
Value | Definition |
---|---|
basic | |
diorite | |
granite | |
metamorphic | |
sed | sedimentary |
syenogranite | |
volcanic |
Value | Definition |
---|---|
Detachment fault | |
Fault | |
Shore | |
Strike-slip fault | |
Thrust Fault |
Value | Definition |
---|---|
0 | needed correction |
4 | final |
Value | Definition |
---|---|
on | onshore |
s | shoreline |
Range of values | |
---|---|
Minimum: | 0 |
Maximum: | 5 |
General guidance - Gregory Ulmishek Digital Geologic Map Compilation in Arc/Info - Feliks Persits Legend design -Feliks Persits and Gregory Ulmishek Geologic Attribution - Feliks Persits Implementation of Metadata- Feliks Persits Arcview and ArcExplorer projects - Feliks Persits Map design and verification - Feliks Persits and Gregory Ulmishek CD-ROM implementation - Feliks Persits
303-236-5776 (voice)
303-236-8822 (FAX)
ahlbrandt@usgs.gov
The data provide government, geologic community, consultants, and the general public with the geological basis for small scale natural resource surveys, exploration, and analysis.
A. V. Okulitch (compiler, editor), B. G. Lopatin (compiler, editor), and H. R. Jackson (compiler, editor), 1989, Circumpolar geologic map of the Arctic: Map 1765-A, Geological Survey of Canada, Ottawa, ON.
IHS Energy Group (Petroconsultants)., 2001, Probe 4.0 World Oil and Gas Database: Petroleum Information/Dwights LLC d/b/a/IHS Energy Group, Englewood, Colorado, USA (this version).
International Oceanographic Commission (IOC), and National Oceanic and Atmospheric Administration (NOAA), 2001, International Bathymetric Chart of the Arctic Ocean (IBCAO): IBCAO Version 1.0 created 2001-07-11, U.S. National Geophysical Data Center (NGDC), Boulder, CO.Online Links:
- http:/www.ngdc.noaa.gov/mgg/bathymetry/arctic/arctic.html
Geological Survey of Canada, 1996, Geological Map of Canada: Map D1860A, Geological Survey of Canada, Ottawa, ON.
ESRI, 1992-1996, ArcWorld 1:3 million geographic data set.: ArcWorld ArcWorld 1:3M, ArcWorld Supplement, ESRI, Redlands, CA, USA.
shore_st - shorelines riv_str - river and lakes ctry_str - country boundaries
Person who carried out this activity:
303-236-3612 (voice)
303-236-8822 (FAX)
fpersits@usgs.gov
Overall accuracy is based on accuracy of general geology coverage. Because all the attributes are of character type, only correctness of polygon labeling can be provided (see below).
1. Attribute items "AGE_OR", "LI_TYPE" are abstracted from fill colors and patterns of source map denoting geologic age. Offshore and onshore units are attributed separately and can be displayed selectively by "POS" item.
2. Rigorous verification and comparison of geologic attributes with other paper and digital maps were carried out on Canadian and Alaskan parts of the map.
3. Standard verification of attribute reliability was performed with the Arc/Info command LABELERRORS to find polygons without assigned character value or with more than one value. A comparison between color plot and original paper map was carried out by on-screen visual examination. The coverages were superimposed on a registered and rectified gray-scale scanned image of the original map and inspected. All evident errors detected in attributes were corrected.
4. Two attribute items have been added: ERROR and CHECK. The first stands for evident error on original paper map, the second one - geologic attribute was assigned with level of uncertainty (color and pattern do not coincide).
The scanned gray-scale image of original paper map was transformed to Polar Stereographic projection by polynomial transformation of second order with RMS error not more than 2500 m (0.37 mm in original paper map). That was the first step. The second step was a piece-wise rubber sheeting transformation of the image using ESRI's shoreline as a reference.
There are three main considerations to assess overall positional accuracy:
1. Thickness of a shoreline on the image varies from 2500 to 4500 meters. Therefore maximum shift of a line in a coverage from centerline of its copy on image should not exceed 1250-2250 m. Since shoreline has been used to georeference image, this value affects overall accuracy.
2. Shoreline has been digitized from the original geologic map and based on data from General Bathymetric Map of Ocean (1983 data). ESRI shoreline is based on the Digital Chart of the World (1992-1996 data) and is more detailed and updated. Because of these different compilations there was mismatch in large scale patterns of two shorelines with good general match.
3. Overall accuracy is estimated by measuring distance between these two shoreline versions at randomly chosen locations. The RMS error is 2450 m (0.36 mm of original paper map) with maximum mismatch of 6.5 km. This mismatch does not include areas where newer ESRI shoreline reveals new details. The final georeferenced image was used as a backdrop in ARCEDIT digitizing.
All unique geologic age subdivisions (104 values) plus eight (8) lithologic subdivisions from the original geologic map were reproduced in ArcInfo coverage.
The data set originated from a collection of ARC/INFO coverages that were topologically consistent. The fuzzy tolerance was consistent through each processing step (200 m or 0.002 degree). Based on this fuzzy tolerance value, all undershoots and overshoots were detected and deleted. Execution of Arc/Info CLEAN command indicated the original coverage is topologically clean. Duplicate lines, overshoots and undershoots, if any, were corrected. All polygons are closed and labeled. Polygons at the edge of the map are closed with a map outer polygon.
Are there legal restrictions on access or use of the data?
- Access_Constraints: None
- Use_Constraints:
- Coverages covering shoreline, rivers and lakes, and country boundaries contain intellectual property of Environmental Systems Research Institute, Inc. (ESRI), and are used with their permission.
Coverages covering oil and gas fields centerpoints contain intellectual property of IHS Energy Group (Petroconsultants), and are used with their permission. End users are permitted to use these data sets for their own internal use, including derivative work, but are prohibited from redistributing these data individually or in a derivative work to third parties.
303-236-1647 (voice)
eteamdisks@usgs.gov
USGS Open-File Report 97-470J
This publication was prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employee, makes any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed in this report, or represent that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessary constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof.
Data format: | Surface geology (Polar Stereographic projection) in format ArcInfo Export (version 8.x) Size: 6.7 megabytes |
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Network links: |
<http://certmapper.cr.usgs.gov/data/wep/arctic/arc_geotf.zip> |
Data format: | Oil and Gas Field Centerpoints (Polar Stereographic projection) in format ArcInfo Export (version 8.x) Size: 22 kilobytes |
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Network links: |
<http://certmapper.cr.usgs.gov/data/wep/arctic/fld_str.zip> |
Data format: | Surface Geology (line and point topology only) (Geographic coordinates) in format ArcInfo Export (version 8.x) Size: 8.8 megabytes |
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Network links: |
<http://certmapper.cr.usgs.gov/data/wep/arctic/arc_geog.zip> |
Data format: | Oil and Gas Field Centerpoints (Geographic coordinates) in format ArcInfo Export (version 8.x) Size: 125 kilobytes |
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Network links: |
<http://certmapper.cr.usgs.gov/data/wep/arctic/fld_ihsg.zip> |
Data format: | Geologic polygon features (Polar Stereographic projection) in format Shapefile (version 1.0) Size: 6.5 megabytes |
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Network links: |
<http://certmapper.cr.usgs.gov/data/wep/arctic/arc_geos.zip> |
Data format: | Faults and shoreline (onshore) (Polar Stereographic projection) in format Shapefile (version 1.0) Size: 4.33 megabytes |
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Network links: |
<http://certmapper.cr.usgs.gov/data/wep/arctic/flt_onn.zip> |
Data format: | Geologic polygon features (onshore) (Polar Stereographic projection) in format Shapefile (version 1.0) Size: 4.6 megabytes |
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Network links: |
<http://certmapper.cr.usgs.gov/data/wep/arctic/geo_onn.zip> |
Data format: | Geologic line features (Polar Stereographic projection) in format Shapefile (version 1.0) Size: 4.5 megabytes |
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Network links: |
<http://certmapper.cr.usgs.gov/data/wep/arctic/linef.zip> |
(303) 236-3611 (voice)
(303) 236-8822 (FAX)
dferdere@usgs.gov