The data is supplied in ARC/INFO export format.
DATABASE STRUCTURE - ARC/INFO ====================================
This GIS database includes related look-up tables, which store detailed attribute information. This database structure is more fully described in USGS OFR 99-438. The GIS database structure used in the database includes symbol items in coverage point, polygon (PAT) and arc (AAT)attribute tables for user convenience. Arc/Info relates for each coverage are saved in a file named <covername>.rel. Use the RELATE command with the restore argument at the arc prompt to make the relates active. Alternatively, in Arctools, use the Relate environment: open dialog in the Manage - Relates flyout menu under the Arctools menu to make the relates active.
denvdip coverage: Contains points recording site-specific observations and measurements, such as strike and dip of bedding. In the denvdip.pat INFO file the PTTYPE item lists the type of point symbol, e.g., strike and dip of inclined bedding. The SYMBOL item lists the marker symbol used by ArcInfo to identify the type of structural map symbol(Symbol numbers refer to the geoscamp2.mrk markerset). The STRIKE item contains the strike of bedding. Strike is an azimuthal angle (measured in degrees from 0 to 360 in a clockwise direction from North). The DIP item contains the dip of bedding. This value is an angle measured (in degrees 0 to 90) down from the horizontal; thus a horizontal dip is 0 degrees and a vertical dip is 90 degrees. The SOURCE item lists the numeric code used to identify the data source. The DISPLAY item is coded 1 when a point is displayed on the map layout, 2 when it is not. Some data points are not displayed on the map because they would overpost adjacent data points at the 1:100,000 display scale.
In the coverage's denvdip.ref INFO file the SOURCE item lists the numeric code used to identify the data source. The scale item lists the scale of the source map. (This value is the denominator of the proportional fraction that identifies the scale of the map that was digitized or scanned to produce the digital map.) The AUTHORS item lists the author(s) or compiler(s) of source map entered as last name, first name or initial, and middle initial. The YEAR item lists the source (map) publication date. The REFERENCE item lists the remainder of the reference in USGS reference format.
denvcnty coverage: Contains lines representing county boundaries derived from Colorado Department of Local Affairs, Colorado Office of Emergency Management data.
In the coverage's denvcnty.ref INFO file the SOURCE item lists the numeric code used to identify the data source. The scale item lists the scale of the source map. (This value is the denominator of the proportional fraction that identifies the scale of the map that was digitized or scanned to produce the digital map.) The AUTHORS item lists the author(s) or compiler(s) of source map entered as last name, first name or initial, and middle initial. The YEAR item lists the source (map) publication date. The REFERENCE item lists the remainder of the reference in USGS reference format.
denvhwy coverage: Contains lines representing highways and major arterials. In the denvhwy.aat INFO file the FEATURID item contains a unique line identifier assigned by the Federal Highway Administration. The DESCRIPT item provides the name or identification for the link (i.e. BASELINE RD). The DSOURCE item provides the original source of the coordinate information (i.e. S=State Supplied Digital Data, U=USGS Digital Line Graphs, T=US Census TIGER/Line files, M=Digitized from State supplied maps, H=Military Supplied data, all other values indicate Unknown). The STFIPS item indicates the two character State FIPS Code (FIPS Pub 6-4). The CTFIPS item indicates the three digit County FIPS code (FIPS Pub 6-4). The SIGN1 item indicates the Primary Sign Route (i.e. I-25). The SIGN2 item indicates the Alternate Sign Route. The MILES item indicates an accurate measurement in miles for the link chain. The KM item indicates an accurate measurement in kilometers for the link chain. The FACTYPE item describes the permissible flow of traffic over the link (1=One-way flow, 2=Bi-directional flow). The LANES item indicates the number of lanes in both directions.
In the coverage's denvhwy.ref INFO file the SOURCE item lists the numeric code used to identify the data source. The scale item lists the scale of the source map. (This value is the denominator of the proportional fraction that identifies the scale of the map that was digitized or scanned to produce the digital map.) The AUTHORS item lists the author(s) or compiler(s) of source map entered as last name, first name or initial, and middle initial. The YEAR item lists the source (map) publication date. The REFERENCE item lists the remainder of the reference in USGS reference format.
denvhyp coverage: Contains lines representing hypsographic contours derived from USGS Digital Line Graph data. In the denvhyp.aat INFO file the ELEV item contains the contour elevation in meters.
In the coverage's denvhyp.ref INFO file the SOURCE item lists the numeric code used to identify the data source. The scale item lists the scale of the source map. (This value is the denominator of the proportional fraction that identifies the scale of the map that was digitized or scanned to produce the digital map.) The AUTHORS item lists the author(s) or compiler(s) of source map entered as last name, first name or initial, and middle initial. The YEAR item lists the source (map) publication date. The REFERENCE item lists the remainder of the reference in USGS reference format.
denvplss coverage: Contains lines representing U.S. Public Land Survey System township and range lines derived from USGS Digital Line Graph data
In the coverage's denvplss.ref INFO file the SOURCE item lists the numeric code used to identify the data source. The scale item lists the scale of the source map. (This value is the denominator of the proportional fraction that identifies the scale of the map that was digitized or scanned to produce the digital map.) The AUTHORS item lists the author(s) or compiler(s) of source map entered as last name, first name or initial, and middle initial. The YEAR item lists the source (map) publication date. The REFERENCE item lists the remainder of the reference in USGS reference format.
The INFO structure of these files is listed below:
DENVDIP.PAT:
COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME
1 AREA 8 18 F 5
9 PERIMETER 8 18 F 5
17 DENVDIP# 4 5 B -
21 DENVDIP-ID 4 5 B -
25 PTTYPE 80 80 C -
105 SYMBOL 3 3 I -
108 STRIKE 3 3 I -
111 DIP 3 3 I -
114 SOURCE 4 4 I -
118 DISPLAY 3 3 I -
DENVDIP.REF:
COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME
1 SOURCE 4 4 I -
5 SCALE 8 8 I -
13 AUTHORS 200 200 C -
213 YEAR 4 4 I -
217 REFERENCE 250 250 C -
DENVCNTY.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 DENVCNTY# 4 5 B -
29 DENVCNTY-ID 4 5 B -
33 SOURCE 4 4 I -
DENVCNTY.REF:
COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME
1 SOURCE 4 4 I -
5 SCALE 8 8 I -
13 AUTHORS 200 200 C -
213 YEAR 4 4 I -
217 REFERENCE 250 250 C -
DENVHWY.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 DENVHWY# 4 5 B -
29 DENVHWY-ID 4 5 B -
33 FEATURID 8 20 F 0
41 DESCRIPT 35 35 C -
76 DSOURCE 1 1 C -
77 STFIPS 2 2 C -
79 CTFIPS 3 3 C -
82 SIGN1 6 6 C -
88 SIGN2 6 6 C -
94 MILES 4 13 F 2
98 KM 4 13 F 2
102 FACTYPE 8 11 F 0
110 LANES 8 11 F 0
118 SOURCE 4 4 I -
DENVHWY.REF:
COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME
COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME
1 SOURCE 4 4 I -
5 SCALE 8 8 I -
13 AUTHORS 200 200 C -
213 YEAR 4 4 I -
217 REFERENCE 250 250 C -
DENVHYP.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 DENVHYP# 4 5 B -
29 DENVHYP-ID 4 5 B -
33 ELEV 6 6 I -
39 SOURCE 4 4 I -
DENVHYP.REF:
COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME
COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME
1 SOURCE 4 4 I -
5 SCALE 8 8 I -
13 AUTHORS 200 200 C -
213 YEAR 4 4 I -
217 REFERENCE 250 250 C -
DENVPLSS.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 DENVPLSS# 4 5 B -
29 DENVPLSS-ID 4 5 B -
33 SOURCE 4 4 I -
DENVPLSS.REF:
COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME
1 SOURCE 4 4 I -
5 SCALE 8 8 I -
13 AUTHORS 200 200 C -
213 YEAR 4 4 I -
217 REFERENCE 250 250 C -
Coding of PTTYPE in the denvdip coverage:
Horizontal bedding
Inclined bedding - Showing strike and dip
Overturned bedding - Showing strike and dip
Vertical bedding - Showing strike
