Structure contours of top of Laramie-Fox Hills aquifer in "Structure, outcrop, and subcrop of the bedrock aquifers along the western margin of Denver Basin, Colorado." Hydrologic Atlas 742

Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: U.S. Geological Survey - Rafferty, Sharon A.
Publication_Date: 19980630
Title:
Structure contours of top of Laramie-Fox Hills aquifer in "Structure, outcrop, and subcrop of the bedrock aquifers along the western margin of Denver Basin, Colorado." Hydrologic Atlas 742
Edition: Version 1.0, July 20, 1998
Geospatial_Data_Presentation_Form: Downloadable GIS Data
Publication_Information:
Publisher: U.S. Geological Survey, WRD
Online_Linkage: http://pubs.usgs.gov/ds/2006/193/
Larger_Work_Citation:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: 1998
Title:
Colorado Front Range Infrastructure Resources Project
Geospatial_Data_Presentation_Form: report
Series_Information:
Series_Name: Hydrologic Investigations Atlas
Issue_Identification: HA-742
Publication_Information:
Publication_Place: Denver, Colorado
Publisher: U.S. Geological Survey
Online_Linkage: http://water.usgs.gov/GIS/metadata/usgswrd/XML/co_lfhtop_ha742.xml
Description:
Abstract:
This digital geospatial data set consists of structure contours
of the top of the Laramie-Fox Hills aquifer along the Front Range
of Colorado.  The U.S. Geological Survey developed this data set as
part of a project described in the report, "Structure, Outcrop, and
Subcrop of the Bedrock Aquifers Along the Western Margin of the Denver Basin,
Colorado" (Robson and others, 1998).
Purpose:
This data set was created to display maps of the altitude
of the top of the Laramie-Fox Hills aquifer
(Robson and others, 1998).
Supplemental_Information:
Procedures_Used:
Structure contours of the top of the Laramie-Fox Hills aquifer and
tic marks were scanned from 1:50,000 maps (Robson and others, 1998)
at 200 to 800 dots per inch. These scans then were saved into a TIFF
(tagged image file format which is a bit-mapped file format).
The TIFF's were converted to unrectified grids (ARC/INFO raster
geospatial datasets), by the ARC/INFO command IMAGEGRID.  Vector
geospatial data sets, known as coverages in ARC/INFO
terminology, were created from ascii files containing the latitude and
longitude coordinates in degrees, minutes and seconds.  These coverages
were projected into a State Plane projection that was specific to each
county map. From these coverages, link files were then created to help
register the grids to the coverages by use of the ARC/INFO command
CONTROLPOINTS.

Arc: controlpoints fig2_grid fig2_lin fig2_tics nominal identity # point

Registration root mean square errors of 0.005 or less were acceptable for
the creation of link files.

The unrectified grids were georectified with the ARC/INFO command
GRIDWARP, which transforms or rubber sheets a grid along a set of links
by using a first-order polynomial transformation.  The grid-cell size
was resampled to a larger cell size to decrease processing time for
conversion to coverages.

GRID:  setcell 20
GRID:  fig2_20grid = fig2_rgrid

Line coverages were created from the georectified grids with the ARC/INFO
command GRIDLINE, using a line thickness of 150 feet, a weed tolerance
of 40 feet, and a default dangle of 0.7 times the thickness.

GRID: fig2_cov = gridline (fig2_20grid,positive,thin,nofilter,
round,noitem,150, #,40)

The coverages then were built with line topology and attributed.
To improve cartographic display, arcs
were smoothed by splining and generalizing in Arcedit with weed
tolerances ranging from 30 to 100 units.
Individual coverages containing the same thematic data  were plotted
and checked for line accuracy and attribution. The individual coverages
were then appended to form a single thematic coverage.

The final coverage represents one thematic layer in
maps in Robson and others (1998).

This data set is one of seven digital map data sets being published
for this area.  The other six data sets are:

ARAPBASE  -  structure contours on base of upper Arapahoe aquifer
LFHBASE   -  structure contours on base of Laramie-Fox Hills and
Arapahoe aquifers
WELLS     -  location of  wells
GEOSYMB   -  point and line geologic structure information
GEO       -  geohydrologic unit boundaries
STUDYAREA -  outline of study area for maps produced in HA-742

The following is an AML to generate a graphic of this coverage.

map lfhtop.map
mape studyarea
mapunits meters
pagesize 37 51
mappos cen cen
clearsel
box 1.0 1.0 35 49.5
arcs studyarea

lineset carto
linesymbol 214
linesize .02
linetype hardware
linecolor red
lineput 214
resel lfhtop arcs length gt 5813.285
resel lfhtop arcs dashed cn 'y'
textfont 94022
textsize 7 pt
textcolor red
arctext lfhtop contnum # line blank /*noflip

resel lfhtop arcs length lt 5814.0
resel lfhtop arcs dashed cn 'y'
linesymbol 214
linesize .02
linetype hardware
linecolor red
lineput 214
arcs lfhtop
clearsel

/*PRINTING LABELS OF  UNDASHED CONTOURS OF BASE
lineset carto
textfont 94022
textsize 7 pt
linesymbol 1
linesize .02
linecolor usgsred spot 100
lineput 1
resel lfhtop arcs length gt 5813.285
resel lfhtop arcs dashed cn 'n'
textcolor red
arctext lfhtop contnum # line blank /*noflip

/*PRINTING UNDASHED CONTOURS OF BASE
clearsel
linesymbol 1
linetype hardware
linesize .02
linecolor red
lineput 1
resel lfhtop arcs length lt 5814.0
resel lfhtop arcs dashed cn 'n'
arcs lfhtop
clearsel

Reviews_Applied_to_Data:

March 1998:  Colleague review of 1:50,000-scale maps that
were generated from the original data set.  Manuscript review
included validation of method as outlined in map report and
inspection for positional accuracy.

March 1998:  Inspection of copy generated from this data set.

April 1998:  Colleague review of original digital data set
and associated metadata.  Metadata review included verification
of table and column/item identities and definitions, validation
of the reference data sets and citations, verification of
consistency between log file and documented procedures, and
validation of development method as described in the documentation.

References_Cited:

Robson,S.G., Van Slyke, George, and Graham, Glenn, 1998,
Structure, outcrop, and subcrop of the
bedrock aquifers along the western margin of the Denver
Basin, Colorado:  U.S. Geological Survey Hydrologic
Investigations Atlas HA-742, 5 sheets, scale 1:50,000.
Available through the internet at <URL:http://rockyweb.cr.usgs.gov/frontrange/>
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 1998
Currentness_Reference:
Current as of publication date.
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned.
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -104.96266486
East_Bounding_Coordinate: -104.59900529
North_Bounding_Coordinate: 40.88457484
South_Bounding_Coordinate: 40.10504503
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: aquifer
Theme_Keyword: structure contour
Theme_Keyword: inlandWaters
Theme:
Theme_Keyword_Thesaurus: ArcIMS Metadata Server Theme Codes
Theme_Keyword: geoscientificInformation
Theme_Keyword: economy
Theme_Keyword: environment
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Front Range, Colorado
Place_Keyword: Denver
Access_Constraints: None.
Use_Constraints:
These data are not to be used at scales greater than 1:50,000.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey Water Resources Division
Contact_Person: Colorado District Chief
Contact_Address:
Address_Type: mailing address
Address:
Box 25046, MS 415, Denver Federal Center
City: Denver
State_or_Province: CO
Postal_Code: 80225
Country: USA
Contact_Voice_Telephone: 1-888-275-8747
Contact_Facsimile_Telephone: 303-236-2904
Contact_Electronic_Mail_Address: wfhorak@usgs.gov
Browse_Graphic:
Browse_Graphic_File_Name: http://certmapper.cr.usgs.gov/data/frip/graphic/lfhtop.jpg
Browse_Graphic_File_Type: JPEG
Data_Set_Credit:
U.S. Geological Survey
Native_Data_Set_Environment:
dgux, 5.4R3.10, AViiON UNIX ARC/INFO version 7.0.4
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Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Procedures used to develop contours are described
in Hydrologic Atlas-742
Logical_Consistency_Report:
Chain-node topology present.
Completeness_Report:
See supplemental information.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
Scanned lines and data points are within 0.01 inch of original line work.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
n/a
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: 1998
Title:
Structure, outcrop, and subcrop of the bedrock aquifers along the western edge of the Denver Basin, Colorado.
Geospatial_Data_Presentation_Form: Map
Series_Information:
Series_Name: Hydrologic Investigations Atlas
Issue_Identification: HA-742
Publication_Information:
Publication_Place: Denver, CO
Publisher: USGS, WRD
Type_of_Source_Media: mylar separate
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 1997
Source_Currentness_Reference:
publication date
Source_Citation_Abbreviation:
HA-742
Source_Contribution:
Structure contours were hand drawn.  Please see
Robson and others (1998).
Process_Step:
Process_Description:
See Supplemental Information
Process_Date: 1998
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Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: String
Point_and_Vector_Object_Count: 40
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Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number: 13
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: implied
Longitude_of_Central_Meridian: implied
Latitude_of_Projection_Origin: implied
False_Easting: implied
False_Northing: implied
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 8.645301242522
Ordinate_Resolution: 8.645301242522
Planar_Distance_Units: Meters
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: GRS1980
Semi-major_Axis: 6378206.4
Denominator_of_Flattening_Ratio: 294.98
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Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: LFHTOP.AAT
Entity_Type_Definition:
Attribute table of LFHTOP
Entity_Type_Definition_Source:
GIS software
Attribute:
Attribute_Label: FNODE#
Attribute_Definition:
Internal number of from-node
Attribute_Definition_Source:
Computed
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Sequential unique positive integer
Enumerated_Domain_Value_Definition:
n/a
Enumerated_Domain_Value_Definition_Source:
GIS software
Attribute:
Attribute_Label: TNODE#
Attribute_Definition:
Internal number of to-node
Attribute_Definition_Source:
Computed
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Sequential unique positive integer
Enumerated_Domain_Value_Definition:
n/a
Enumerated_Domain_Value_Definition_Source:
GIS software
Attribute:
Attribute_Label: LPOLY#
Attribute_Definition:
Internal number of poly to left of arc
Attribute_Definition_Source:
Computed
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Sequential unique positive integer
Enumerated_Domain_Value_Definition:
n/a
Enumerated_Domain_Value_Definition_Source:
GIS software
Attribute:
Attribute_Label: RPOLY#
Attribute_Definition:
Internal number of poly to right of arc
Attribute_Definition_Source:
Computed
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Sequential unique positive integer
Enumerated_Domain_Value_Definition:
n/a
Enumerated_Domain_Value_Definition_Source:
GIS software
Attribute:
Attribute_Label: LENGTH
Attribute_Definition:
Length of arc in coverage units
Attribute_Definition_Source:
Computed
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Positive real numbers
Enumerated_Domain_Value_Definition:
n/a
Enumerated_Domain_Value_Definition_Source:
User assigned
Attribute:
Attribute_Label: LFHTOP#
Attribute_Definition:
Internal feature number
Attribute_Definition_Source:
Computed
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Sequential unique positive integer
Enumerated_Domain_Value_Definition:
n/a
Enumerated_Domain_Value_Definition_Source:
User assigned
Attribute:
Attribute_Label: LFHTOP-ID
Attribute_Definition:
User-assigned feature number
Attribute_Definition_Source:
User-defined
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Integer
Enumerated_Domain_Value_Definition:
n/a
Enumerated_Domain_Value_Definition_Source:
GIS software
Attribute:
Attribute_Label: DASHED
Attribute_Definition:
Contour line sections inferred or interpolated
Attribute_Definition_Source:
User-defined
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: "y", "n"
Enumerated_Domain_Value_Definition:
y for yes, inferred
n for no, not inferred
Enumerated_Domain_Value_Definition_Source:
User assigned
Attribute:
Attribute_Label: CONTNUM
Attribute_Definition:
Altitude of top of Laramie-Fox Hills aquifer above sea level.
Attribute_Definition_Source:
see, (Robson and others, 1998)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: 100 foot intervals
Enumerated_Domain_Value_Definition:
n/a
Enumerated_Domain_Value_Definition_Source:
User assigned
Overview_Description:
Entity_and_Attribute_Overview:
Item DASHED is a graphical indicator to represent whether
data displayed was known or inferred.
y = display line as dashed (inferred)
n = display line as solid (known).

Item CONTNUM indicates number of feet above sea level of
base of aquifer.
>
>LFHTOP.AAT:
>
>COLUMN   ITEM NAME        WIDTH OUTPUT  TYPE N.DEC  ALTERNATE NAME
>    1  FNODE#                 4     5     B      -
>    5  TNODE#                 4     5     B      -
>    9  LPOLY#                 4     5     B      -
>   13  RPOLY#                 4     5     B      -
>   17  LENGTH                 8    18     F      5
>   25  LFHTOP#                4     5     B      -
>   29  LFHTOP-ID              4     5     B      -
>   33  DASHED                 2     2     C      -
>   35  CONTNUM                5     5     I      -
>
>
Entity_and_Attribute_Detail_Citation:
Not available
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Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Position: Ask USGS - Water Webserver Team
Contact_Address:
Address_Type: mailing
Address:
507 National Center
City: Reston
State_or_Province: VA
Postal_Code: 20192
Contact_Voice_Telephone: 1-888-275-8747 (1-888-ASK-USGS)
Contact_Electronic_Mail_Address: http://answers.usgs.gov/cgi-bin/gsanswers?pemail=h2oteam&subject=GIS+Dataset+co_lfhtop_ha742
Resource_Description: Downloadable Data
Distribution_Liability:
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.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: ArcInfo Export File
Format_Information_Content:
Structure contour geographic features
Transfer_Size: 50 KB
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: http://certmapper.cr.usgs.gov/data/frip/spatial/export/lfhtope.zip
Digital_Form:
Digital_Transfer_Information:
Format_Name: Shapefile
Format_Information_Content:
Structure contour geographic features
Transfer_Size: 50 KB
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: http://certmapper.cr.usgs.gov/data/frip/spatial/shape/lfhtop.zip
Digital_Form:
Digital_Transfer_Information:
Format_Name: Image Map Service (CO_FrontRange)
Format_Version_Number: 4.01
Format_Specification:
ArcIMS Image Map Service
Format_Information_Content:
A web-based interactive mapping system that accesses an ArcIMS Map Service running on certmapper.cr.usgs.gov.
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: http://certmapper.cr.usgs.gov/pubs/servlet/MapViewerBroker?project=frip&Service=CO_FrontRange&OVMap=CO_overview
Access_Instructions:
This URL links to a web-based interactive mapping system that accesses an ArcIMS Image Map Service that runs in Netscape 4.7, Internet Explorer 4.5 and higher. The mapservice can also be accessed using any custom client that adheres to the protocol specified through ArcXML.
Digital_Form:
Digital_Transfer_Information:
Format_Name: Export
Format_Information_Content:
Full coverage
File_Decompression_Technique: zipped
Transfer_Size: 1
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: http://water.usgs.gov/GIS/dsdl/lfhtop.e00.gz
Digital_Form:
Digital_Transfer_Information:
Format_Name: Other
Format_Information_Content:
Full coverage
File_Decompression_Technique: zipped
Transfer_Size: 1
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: http://water.usgs.gov/GIS/dsdl/lfhtop.tgz
Fees: None. This dataset is provided by USGS as a public service.
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Metadata_Reference_Information:
Metadata_Date: 20041108
Metadata_Review_Date: 20050310
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Position: Ask USGS -- Water Webserver Team
Contact_Address:
Address_Type: mailing
Address:
507 National Center
City: Reston
State_or_Province: VA
Postal_Code: 20192
Contact_Voice_Telephone: 1-888-275-8747 (1-888-ASK-USGS)
Contact_Electronic_Mail_Address: http://answers.usgs.gov/cgi-bin/gsanswers?pemail=h2oteam&subject=GIS+Dataset+co_lfhtop_ha742
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
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