Abbott, Marvin M.
Runkle, Donna
Rea, Alan
1997
Digital data sets that describe aquifer characteristics of the Antlers aquifer in southeastern Oklahoma
1.0
map
Open-File Report
96-443
Reston, VA
U.S. Geological Survey
http://water.usgs.gov/lookup/getspatial?ofr96-443_wlelev
This data set consists of digitized water-level elevation
contours for the Antlers aquifer in southeastern Oklahoma. The
Early Cretaceous-age Antlers Sandstone is an important source of
water in an area that underlies about 4,400-square miles of all
or part of Atoka, Bryan, Carter, Choctaw, Johnston, Love,
Marshall, McCurtain, and Pushmataha Counties. The Antlers
aquifer consists of sand, clay, conglomerate, and limestone in
the outcrop area. The upper part of the Antlers aquifer consists
of beds of sand, poorly cemented sandstone, sandy shale, silt,
and clay. The Antlers aquifer is unconfined where it outcrops in
about an 1,800-square-mile area.
The water-level elevation contours were digitized from a mylar
map at a scale of 1:250,000 that was used to prepare a final map
published at a scale of 1:500,000 in a ground-water modeling
report. Water levels measured in wells in 1970 were used to
construct the map. The water-level elevation contours for the
Antlers aquifer in Texas are not included in this data set. The
digital data set contains water-level elevations that range from
300 feet (in the east) to 900 feet (in the west) above sea level
or the National Geodetic Vertical Datum of 1929.
This data set was created for a project to develop data sets to
support ground-water vulnerability analysis. The objective was
to create and document a digital geospatial data set from a
published report or map, or existing digital geospatial data
set that could be used in ground-water vulnerability analysis.
Introduction --
This data set consists of digitized water-level elevation
contours for the Antlers aquifer in southeastern Oklahoma. The
Early Cretaceous-age Antlers Sandstone is an important source of
water in an area that underlies about 4,400-square miles of all
or part of Atoka, Bryan, Carter, Choctaw, Johnston, Love,
Marshall, McCurtain, and Pushmataha Counties. The Antlers
aquifer consists of sand, clay, conglomerate, and limestone in
the outcrop area. The upper part of the Antlers aquifer consists
of beds of sand, poorly cemented sandstone, sandy shale, silt,
and clay. The Antlers aquifer is unconfined where it outcrops in
about an 1,800-square-mile area (Morton, 1992).
The water-level elevation contours were digitized from a mylar
map at a scale of 1:250,000 that was used to prepare the final
map that was published as plate 1, map A, "Observed
potentiometric surface, 1970, Antlers aquifer" at a scale of
1:500,000 in Morton (1992). Morton (1992) used water levels
measured in wells in 1970 to construct the map. The water-level
elevation contours for the Antlers aquifer in Texas (Morton,
1992) are not included in this data set.
In this report, elevation refers to distance above sea level and
sea level refers to the National Geodetic Vertical Datum of 1929
(NGVD29)--a geodetic datum derived from a general adjustment of
the first-order level nets of both the United States and Canada,
formerly called Sea Level Datum of 1929. The digital data set
contains water-level elevations that range from 300 feet (in the
east) to 900 feet (in the west) above sea level or the National
Geodetic Vertical Datum of 1929.
Reviews Applied to Data --
This electronic report was subjected to the same review standard
that applies to all U.S. Geological Survey reports. Reviewers
were asked to check the topological consistency, tolerances,
attribute frequencies and statistics, projection, and geographic
extent. Reviewers were given digital data sets and paper plots
for checking against the source maps to verify the linework and
attributes. The reviewers checked the metadata and a_readme.1st
files for completeness and accuracy.
Related Spatial and Tabular Data Sets --
This data set is one of four digital map data sets being published
together for this aquifer. The four data sets are:
> aqbound - aquifer boundaries
> cond - hydraulic conductivity
> recharg - aquifer recharge
> wlelev - water-level elevation contours
Digital map data sets of the Oklahoma surficial geology digitized from
1:250,000-scale maps (or 1:125,000-scale maps for the three Oklahoma
panhandle counties) are published separately.
Other References Cited --
Cederstrand, J.R., 1996a, Digital geologic map of the
Ardmore-Sherman quadrangles, south-central Oklahoma: U.S.
Geological Survey Open-File Report 96-370, based on a scale
of 1:250,000, 3 diskettes. (Available in nonproprietary and
ARC/INFO formats.)
URL: http://wwwok.cr.usgs.gov/gis/geology/index.html
Cederstrand, J.R., 1996b, Digital geologic map of
McAlester-Texarkana quadrangles, southeastern Oklahoma:
U.S. Geological Survey Open-File Report 96-377, based on
a scale of 1:250,000, 3 diskettes. (Available in nonproprietary
and ARC/INFO formats.)
URL: http://wwwok.cr.usgs.gov/gis/geology/index.html
Environmental Systems Research Institute, Inc. (ESRI), 1995,
ARC/INFO Command Reference, ARC/INFO On-line manuals:
Redlands, CA.
Morton, R.B., 1992, Simulation of ground-water flow in the Antlers
aquifer in southeastern Oklahoma and northeastern Texas:
U.S. Geological Survey Water-Resources Investigations Report
88-4208, 22 p.
Notes --
Any use of trade, product, or firm names is for descriptive
purposes only and does not imply endorsement by the U.S.
Government.
Although this data set has been used by the U.S. Geological
Survey, U.S. Department of the Interior, no warranty expressed or
implied is made by the U.S. Geological Survey as to the accuracy
of the data and related materials.
The act of distribution shall not constitute any such warranty,
and no responsibility is assumed by the U.S. Geological Survey in
the use of this data, software, or related materials.
1970
ground conditions
None planned
-97.4734
-94.4690
34.3487
33.7230
none
ground-water vulnerability
groundwater vulnerability
aquifers
ground water
groundwater
Antlers aquifer
Antlers Sandstone
ground-water levels
groundwater levels
water levels
ground-water level elevation
groundwater level elevation
ground-water level elevation contours
groundwater level elevation contours
water-level elevation contours
water level elevation contours
water-level contours
water level contours
water-level elevation
water level elevation
inlandWaters
none
southeastern Oklahoma
None.
This data set was digitized from a map at a scale of 1:250,000.
The map represents the elevations of water levels in the aquifer in
1970 (Morton, 1992). Water-level elevation contours represented at
this scale are indicative of broad, regional trends and should not
be interpreted as site specific. The water-level elevation contours
were digitized from a mylar-base map (45 inches by 13 inches),
with a maximum registration root-mean-squared error (RMSE) of
0.013 map inches (86 meters ground distance).
Marvin M. Abbott
U.S. Geological Survey
Hydrologist
mailing address
202 NW 66th St., Bldg. 7
Oklahoma City
Oklahoma
73116
United States of America
1-888-275-8747
(405) 843-7712
mmabbott@usgs.gov
none
http://water.usgs.gov/lookup/get?OFR96-443/browse.gif
A browse image of the four aquifer data sets.
GIF
Compilation of this data set and the associated metadata was
funded under a cooperative Joint Funding Agreement between the
U.S. Geological Survey and the State of Oklahoma, Office of
the Secretary of Environment.
Public
UNCLASSIFIED
None
Operating System-- UNIX, ARC/INFO Version 7.0.3,(Mon Mar 13 22:21:55 PST 1995)
Chain-node topology present.
This data set includes all the water-level elevation contours
for 1970 published on plate 1, map A, by Morton (1992) in Oklahoma.
The Antlers aquifer in Texas (Morton, 1992) is not presented in this
publication.
None
64 meters
Resolution as reported
None.
The map showing the "Observed potentiometric surface, 1970, for
the Antlers aquifer" was digitized from a mylar-base map at a
scale of 1:250,000 that was used to prepare the final map
published at a scale of 1:500,000 in Morton (1992). The map was
digitized with projections Universal Transverse Mercator (UTM)
zone 14 for the map west of longitude 96 degrees and UTM zone 15
for the map east of longitude 96 degrees.
The 1:250,000 U.S. Geological Survey base maps were Ardmore, 1967;
McAlester, 1946; Sherman, 1963; and Texarkana, 1963. Ardmore, 1967
and Sherman, 1963 were projected on Army Map Service Projection
(AMS)97 (a Transverse Mercator projection with a central meridian
of 97 degrees west longitude), and McAlester, 1946 and Texarkana,
1963 were projected on AMS95.
Map-1, western half of the "Observed potentiometric surface***", on
the Ardmore and Sherman quadrangle maps, was digitized using a
projection of UTM14 and a datum of North American datum 1927
(NAD27). The maximum root mean square error (RMSE) was 0.010 map
inches or 66 meters. Six tics located on the corners of the
township and range lines were used to reference the "Observed
potentiometric surface***" map on the digitizer.
Map-2, eastern half of the "Observed potentiometric surface***", on
the McAlester and Texarkana quadrangle maps, was digitized using a
projection of UTM15 and a datum of NAD27. The RMSE was 0.019 map
inches or 119 meters. Four tics located on the corners of the
township and range lines were used to reference the "Observed
potentiometric surface***" map on the digitizer.
The registration tics used in the initial digitizing were
township-range corners taken from 1:24,000-scale topographic maps.
It was discovered that the location of tics obtained from a base
set of tics in the computer were from the 1:24,000 maps and
differed from the tics located on the corners of the township and
range lines on the "Observed potentiometric surface***" map
(1:250,000). The 1:250,000-scale U.S.Geological Survey quadrangle
maps were registered on the digitizer using latitudinal and
longitudinal registration tics to correct the problem. Map-1 and Map-2
were registered to the latitudinal and longitudinal set of tics with
the AMS projections. Fourteen registration tics were selected from
the four base maps (Ardmore, McAlester, Sherman, and Texarkana)
and digitized from the quadrangle maps, and given the same tic
identification numbers as the tics that were used in the initial
digitizing. These new tics were used with the ARC/INFO TRANSFORM
command (ESRI, 1995) to adjust the digitized lines to more closely
match the original map. The Ardmore base, Map-1, had a RMSE of
0.002 or 10 meters. The Sherman base, Map-1, had a RMSE of 0.003 or
17 meters. The McAlester, Map-2, base had a RMSE of 0.006 or 41
meters. The Texarkana, Map-2, base had a RMSE of 0.004 or 28
meters.
The aquifer boundaries are from Cederstrand (1996a, 1996b) except
near the streams and rivers that present alluvial and terrace
deposits. Morton (1992) interpolated the aquifer boundaries under
the alluvial and terrace deposits where streams cross the aquifer
outcrop. The polygons in this report also include the aquifer
under the alluvial and terrace deposits to present the aquifer
similar to Morton (1992). The geologic contacts on the digital
geologic map (Cederstrand, 1996b) and the aquifer boundary map
(Morton, 1992) are slightly different. Morton (1992) states the
aquifer is unconfined in the outcrop area. The "Observed
potentiometric surface***" contours represent the water-level
elevation of the water table in the outcrop area in 1970. The
contours were adjusted to the aquifer boundaries (Cederstrand,
1996a, 1996b) along the updip limit of the aquifer. The
potentiometric surface of the confined portion of the aquifer in
Oklahoma is included on the water-level elevation map.
1996
Vector
Point
String
88
GT-polygon composed of chains
Albers Conical Equal Area
29.5
45.5
-96
23
0.0
0.0
coordinate pair
64 meters
64 meters
METERS
North American Datum of 1983
Geodetic Reference System 80
6378137
298.257
WLELEV.AAT
Arc attribute table
ARC/INFO
-
Arc attribute table
ARC/INFO
-
n/a
n/a
FNODE#
Internal number of from-node
Computed
Sequential unique positive integer
n/a
n/a
TNODE#
Internal number of to-node
Computed
Sequential unique positive integer
n/a
n/a
LPOLY#
Internal number of poly to left of arc
Computed
Sequential unique positive integer
n/a
n/a
RPOLY#
Internal number of poly to right of arc
Computed
Sequential unique positive integer
n/a
n/a
LENGTH
Length of arc in coverage units
Computed
Positive real numbers
n/a
n/a
WLELEV#
Internal feature number
Computed
Sequential unique positive integer
n/a
n/a
WLELEV-ID
User-assigned feature number
User-defined
Integer
n/a
n/a
ELEV
Water-level contour elevation in feet above NGVD29
Morton (1992)
300
900
LTYPE
Line type
Morton (1992)
1,2
n/a
n/a
MAJOR1
Water-level contour elevation in feet above NGVD29
Morton (1992)
300
900
MINOR1
Line type
Morton (1992)
1,2
n/a
n/a
Two attributes are associated with each line in this digital
data set. The first attribute, ELEV, contains the elevation of
the water-level contour, expressed in feet above the National
Geodetic Vertical Datum of 1929 (NGVD29). The second attribute,
LTYPE, contains the code 1 that indicates the line is solid or a
code of 2 that indicates the line is dashed on the source map.
ELEV is stored in the first major code (MAJOR1) and LTYPE is
stored in the first minor code (MINOR1) for lines in the Digital
Line Graph (DLG) version of this data set.
See overview.
U.S. Geological Survey
Ask USGS - Water Webserver Team
mailing
445 National Center
Reston
VA
20192
1-888-275-8747 (1-888-ASK-USGS)
http://answers.usgs.gov/cgi-bin/gsanswers?pemail=h2oteam&subject=GIS+Dataset+ofr96-443_wlelev
Although this data set has been used by the U.S. Geological
Survey, U.S. Department of the Interior, no warranty expressed or
implied is made by the U.S. Geological Survey as to the accuracy
of the data and related materials. The act of distribution shall not
constitute any such warranty, and no responsibility is assumed by
the U.S. Geological Survey in the use of this data, software, or
related materials.
Any use of trade, product, or firm names is for descriptive
purposes only and does not imply endorsement by the U.S.
Government.
Export
Full coverage
zipped
1
http://water.usgs.gov/GIS/dsdl/ofr96-443_wlelev.e00.gz
Other
DLG file format
zipped
1
http://water.usgs.gov/GIS/dsdl/ofr96-443_wlelev.dlg.gz
None. This dataset is provided by USGS as a public service.
20041108
U.S. Geological Survey
Ask USGS -- Water Webserver Team
mailing
445 National Center
Reston
VA
20192
1-888-275-8747 (1-888-ASK-USGS)
http://answers.usgs.gov/cgi-bin/gsanswers?pemail=h2oteam&subject=GIS+Dataset+ofr96-443_wlelev
FGDC Content Standards for Digital Geospatial Metadata
FGDC-STD-001-1998