LIBRARY: RIVERS & STREAMS (1:100k)
LOCATION: \STREAMS
LAYER NAME: STREAMS100
COVERAGE DESCRIPTION:
The hydrography layer consists of flowing waters (rivers and streams), standing waters (lakes and ponds), and wetlands--both natural and manmade. Two separate feature types are represented: polygons (areas) and lines. Polygon features have attribute codes that identify water bodies such as lakes, wide river segments, or swamps. Line features have attribute codes that represent streams or shorelines.
The hydrography layer was assembled from data originally published by the U.S. Geological Survey (USGS) in Digital Line Graph (DLG-3) format. DLG-3 data were generated by USGS from 1:100,000-scale maps by manual digitizing and raster scanning.
The tiles are numbered from 1 to 33, northwest to southeast, and this numeric code is contained in the item HYSNUM. A separate item, HSCKEY, contains a number unique to each arc within a tile. HSCKEY and HYSNUM are combined to form a primary key item, TDCKEY, which uniquely identifies every hydrograhy arc record statewide.
Hydrographic feature records in the arc attribute tables (AAT) may be related (linked or joined) with corresponding RF3 records in DS3 tables on the item TDCKEY, which is present in both tables. Users are cautioned to verify the integrity of AAT - DS3 relations, as instances of many DS3 records relating to one AAT record are known to occur.
Reach File data, documentation, and technical support are provided through the USEPA Office of Water's STORET User Assistance Group at 800-424-9067. STORET is the USEPA's national water quality information system.
VITAL STATISTICS:
Datum: NAD 27
Projection: UTM zone 10
Units: Meters
1st Std. Parallel: 34 00 00
2nd Std. Parallel: 40 30 00
Longitude of Origin: -120 00 00
Latitude of Origin: 00 00 00
False Easting (X shift): 0
False Northing (Y shift): 0
Source: USGS DLG-3 (optional format)
Source Media: Magnetic tape (80 byte records)
Source Projection: Universal Transverse Mercator UTM Zones 10
Source Units: Meters
Source Scale: 1:100,000
Capture Method: Scanned, digitized
Conversion Software: ARC/Info rev 5.0.1
Data Structure: Vector
ARC/INFO Coverage Type: NET (Line, polygon)
ARC/INFO Precision: Double
ARC/INFO Tolerances: 0 to 200 meters
Number of Features: 16,077
Layer Size: 116.970 MB
Data Updated: September 1993 (added RF3 line feature table)
DATA DICTIONARY:
ARC ATTRIBUTE TABLE (AAT)
DATAFILE NAME: strms100.AAT
LINE attribute fields (USGS DLG Hydrography line elements):
COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC
-------------------------------------------------------------
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 STRMS100# 4 5 B -
29 STRMS100-ID 4 5 B -
33 MAJOR1 6 6 I -
39 MINOR1 6 6 I -
45 MINOR2 6 6 I -
51 MINOR3 6 6 I -
57 HUC 8 8 I -
65 SEG 4 4 I -
69 RMI 5 5 N 2
74 STR-NAME 30 30 C -
104 HSCKEY 6 6 I -
110 HYSNUM 2 2 I -
112 RF3RCHID 17 17 C -
129 MILE 5 5 N 2
134 STR_TYPE 16 16 I -
FNODE# : The id number of the node feature that represents the beginning point (the From NODE) of the arc.
TNODE# : The id number of the node feature that represents the ending point (To NODE) of the arc.
LPOLY# : The <coverage name># id of the polygon that lies to the left of this arc when facing in the direction of the TNODE. This is blank if there is no polygon topology.
RPOLY# : The <coverage name># id of the polygon that lies to the right of this arc when facing in the direction of the TNODE. This is blank if there Is no polygon topology.
LENGTH : The length of the arc in coverage units.
PRJ1STMS# : The software-assigned unique integer identification number.
PRJ1STMS-ID : A user-assigned identifier number. Where PRJ1STMS-ID is negative (-ID < 0), arc is an artificial neat line (coverage or tile boundary).
MAJOR[1 - 5]: See below.
MINOR[1 - 5]: See below.
FLOW: If equal to 1, flow direction is defined; if equal
to 0, no direction is defined.
HSCKEY: Unique number for each hydrographic feature within a single tile. Ranges from 1 to over 20,000 in some tiles. Item was created for RF3 use. Concatenated with HYSNUM to create TDCKEY.
HYSNUM: Hydrography tile sequence number, ranges from 1 to 33. Item was created for RF3 use. Concatenated to HSCKEY to produce TDCKEY.
MAJOR1-5: Major codes denote hydrography (code 50) as the major feature category to which a line element belongs (as opposed to property boundaries, roads, etc within DLGs).
MINOR1-5: Minor codes assign up to five descriptive subcategories to any single hydrography line element.
Major Minor
Code # Code # Element Description
------ ------ -------------------
50 200 Shoreline
50 201 Man-made shoreline
50 202 Closure line
50 203 Indefinite shoreline
50 204 Apparent Limit
50 205 Outline of a Carolina bay
50 206 Danger curve
50 400 Rapids
50 401 Falls
50 402 Gravel pit/quarry filled w/water
50 403 Gaging station
50 404 Pumping station
50 405 Water intake
50 406 Dam or weir
50 407 Canal lock or sluice gate
50 408 Spillway
50 409 Gate(flood,tidal,head,check)
50 410 Rock
50 411 Crevasse
50 412 Stream
50 413 Braided stream
50 414 Ditch or canal
50 415 Aqueduct
50 416 Flume
50 417 Penstock
50 418 Siphon
50 419 Channel in water area
50 420 Wash or ephemeral drain
50 421 Lake or pond
50 422 Coral reef
50 423 Sand in open water
50 424 Spoil area
50 425 Fish ladders
50 601 Underground
50 602 Overpassing
50 603 Elevated
50 604 Tunnel
50 605 Right bank
50 606 Left bank
50 607 Under construction
50 608 Salt
50 609 Unsurveyed
50 610 Intermittent
50 611 Abandoned or discontinued
50 612 Submerged or sunken
50 613 Wooded
50 614 Dry
50 615 Mineral or hot (sulphur,alkali,etc.)
50 616 Navigable transportation
50 617 Underpassing
50 618 Earthen construction
50 000 Photorevised feature
05N --- Water surface elevation, actual or interpolated.
N = elevation units
1=feet
2=meters
6=feet below datum
7=meters below datum
053 --- Angle of clockwise rotation (nearest whole degree)
055 --- River mile, value in four spaces, right justified
058 000 Best estimate of classification or position
059 0-- Coincident feature
----
RELATED TABLE
The US EPA River Reach File version 3 (RF3-alpha) DS3 table structure is presented below. One DS3 table exists for each of the 33 ARC/INFO hydrography coverages. Each DS3 table is related to its respective hydrography coverage arc attribute table (AAT) on the item TDCKEY. The file is sorted by TDCKEY in sequenctial ordered.
Reach File Reference Information and DS3 attribute Descriptions:
(http://www.epa.gov/OWOW/NPS/rf)
US EPA River Reach File, version 3-alpha (RF3-alpha) attributes:
DATAFILE NAME: PRJ1STMS.DS2
RECORD LENGTH: 433
COL ITEM NAME WIDTH TYPE DESCRIPTION (see details below)
------------------------------------------------------------------------
1 TDCKEY 8 I Teale hydrography primary key
9 CU 8 I Cataloging Unit (aka HUC); 149 total in CA
17 SEG 4 I Segment, unique within a CU
21 MI 5 C Marker Index, unique within a SEG
26 UPMI 5 C Upstream Marker Index
31 RFLAG 1 C Routing flag (0,1)
32 OWFLAG 1 C Open Water reach flag (0,1)
33 TFLAG 1 C Terminal reach flag (0,1)
34 SFLAG 1 C Start reach flag (0,1)
35 REACHTYPE 1 C Type of Reach (A to Z)
36 LEVEL 2 I Stream level code
38 JUNC 2 I Level of downstream reach
40 DIVERGENCE 1 I Divergent junction type code
41 USDIR 1 C Direction of flow of upstream reach
42 TERMID 5 I Terminal stream ID
47 TRMBLV 1 I Terminal base level code
48 PNAME 30 C Primary name of surface water feature
78 PNMCD 11 C Primary name code
89 CNAME 30 C Compliment name
119 CNMCD 11 C Compliment name code
130 OWNAME 30 C Open water name
160 OWNMCD 11 C Open water name code
171 DSCU 8 I Downstream CU
179 DSSEG 4 I Downstream SEG
183 DSMI 5 C Downstream MI
188 CCU 8 I Compliment CU
196 CSEG 4 I Compliment SEG
200 CMI 5 C Compliment MI
205 CDIR 1 C Compliment direction, looking upstream
206 ULCU 8 I Upstream, left CU
214 ULSEG 4 I Upstream, left SEG
218 ULMI 5 C Upstream, left MI
223 URCU 8 I Upstream, right CU
231 URSEG 4 I Upstream, right SEG
235 URMI 5 C Upstream, right MI
240 SEGL 6 N Length of reach (miles and hundredths)
246 RFORGFLAG 1 I Reach File origin flag (1,2,3)
247 ALTPNMCD 8 I Alternate primary name code
255 ALTOWNMC 8 I Alternate open water name code
263 DLAT 8 N Downstream latitude (decimal degrees)
271 DLONG 8 N Downstream longitude
279 ULAT 8 N Upstream latitude
287 ULONG 8 N Upstream longitude
295 MINLAT 8 N Minimum latitude
303 MINLONG 8 N Minumum longitude
311 MAXLAT 8 N Maximum latitude
319 MAXLONG 8 N Maximum longitude
327 NDLGREC 4 I Number of DLG records
331 LN1AT2 4 I DLG line attribute
335 LN2AT2 4 I DLG line attribute
339 AR1AT2 4 I DLG area attribute
343 AR1AT4 4 I DLG area attribute
347 AR2AT2 4 I DLG area attribute
351 AR2AT4 4 I DLG area attribute
355 UPDATE1 6 C Update date #1
361 UPDTCD1 8 C Update code #1
369 UPDTSRC1 8 C Update source #1
377 UPDATE2 6 C Update date #2
383 UPDTCD2 8 C Update code #2
391 UPDTSRC2 8 C Update source #2
[DFG Note: all DFG updates are flagged
in item UPDTSRC2; details below]
399 UPDATE3 6 C Update date #3
405 UPDTCD3 8 C Update code #3
413 UPDTSRC3 8 C Update source #3
421 DIVCU 8 I Divergent CU
429 DIVSEG 4 I Divergent SEG
433 DIVMI 5 C Divergent MI
438 DLGID 6 I DLG number (special use)
444 FILLER 7 C Empty character field (future use)
** REDEFINED ITEMS **
9 RF3RCHID 17 C ID of instant reach (RF3-alpha primary key)
171 DSRF3RCHID 17 C ID of reach downstream of instant reach
188 CURF3RCHID 17 C ID of reach compliment to instant reach
206 ULRF3RCHID 17 C ID of reach upstream left of instant reach
223 URRF3RCHID 17 C ID of reach upstream right of instant reach
421 DIVRF3RCHID 17 C ID of reach divergent from instant reach
-----
DATAFILE NAME: STRMS100.AAT
RECORD LENGTH: 56
Attribute Fields (USGS DLG Hydrography Area Elements):
COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC
-----------------------------------------------------
1 AREA 8 18 F 5
9 PERIMETER 8 18 F 5
17 PRJ1STMS# 4 5 B -
21 PRJ1STMS-ID 4 5 B -
25 MAJOR1 4 6 B -
29 MINOR1 4 6 B -
33 MAJOR2 4 6 B -
37 MINOR2 4 6 B -
41 MAJOR3 4 6 B -
45 MINOR3 4 6 B -
49 MAJOR4 4 6 B -
53 MINOR4 4 6 B -
AREA : The area of the polygon in square coverage units.
PERIMETER : The length of the polygon perimeter of the polygon
in coverage units.
PRJ1STMS# : The software-assigned unique integer identification
number.
PRJ1STMS-ID : A user-assigned identification number.
MAJOR1-4: Major codes denote hydrography (code 50) as the major
feature category to which an area element belongs.
MINOR1-4: Minor codes assign up to four descriptive subcategories
to any single hydrography area element.
Major Minor
Code # Code # Element Description
------ ------- -------------------
50 100 Alkali flat
50 101 Reservoir
50 102 Covered reservoir
50 103 Glacier or permanent snowfield
50 104 Salt evaporator
50 105 Inundation area
50 106 Fish hatchery or farm
50 107 Industrial water impoundment
50 108 Area to be submerged
50 109 Sewage disposal pond/filtration bed
50 110 Tailings pond
50 111 Marsh, wetland,swamp,bog
50 112 Mangrove area
50 113 Rice Field
50 114 Cranberry bog
50 115 Flats(tidal,mud,sand,gravel)
50 116 Bays,estuaries,gulfs,oceans,seas
50 117 Shoal
50 118 Soda evaporator
50 119 Duck pond
50 400 Rapids
50 401 Falls
50 402 Gravel pit/quarry filled w/water
50 403 Gaging station
50 404 Pumping station
50 405 Water intake
50 406 Dam or weir
50 407 Canal lock or sluice gate
50 408 Spillway
50 409 Gate(flood,tidal,head,check)
50 410 Rock
50 411 Crevasse
50 412 Stream
50 413 Braided stream
50 414 Ditch or canal
50 415 Aqueduct
50 416 Flume
50 417 Penstock
50 418 Siphon
50 419 Channel in water area
50 420 Wash or ephemeral drain
50 421 Lake or pond
50 422 Coral reef
50 423 Sand in open water
50 424 Spoil area
50 425 Fish ladders
50 601 Underground
50 602 Overpassing
50 603 Elevated
50 604 Tunnel
50 605 Right bank
50 606 Left bank
50 607 Under construction
50 608 Salt
50 609 Unsurveyed
50 610 Intermittent
50 611 Abandoned or discontinued
50 612 Submerged or sunken
50 613 Wooded
50 614 Dry
50 615 Mineral or hot (sulphur, alkali,etc.)
50 616 Navigable transportation
50 617 Underpassing
50 618 Earthen construction
50 000 Photorevised feature
-----
DATA QUALITY ASSESSMENT:
The following are subjective comments regarding this data.
The USGS DLG features of this layer are fairly complete. The density of line work representing drainage networks appears to vary arbitrarily from quad to quad, and there are discontinuities in lines depicting streams at the edges of 100k quads. The geographic feature accuracy is fair. Contiguous features are not always matched across map sheet boundaries. The attribute completeness and accuracy of MAJOR/MINOR code pairs is good. Users are cautioned to verify drainage network connectivity and water feature names before undertaking extensive processing using RF3 data.
-----
SUPPLEMENTARY INFORMATION (courtesy of Calif. Department of Fish and Game)
In 1993, US EPA changed the Reach File table DS2 to DS3 and changed the MILE and related items from numeric type to character type. No data content changes were made.
-----
INDEX TO 1:100,000 DLG HYDROGRAPHY
ARC/INFO coverage names are composed of the prefixes shown in the statewide grid below (some are abbreviations of the USGS 1:250,000-scale quad map series names), plus the suffix PRJ1STMS for the line and polygon data layers (for example, RDPRJ1STMS, for the Redding quad).
The item HYSNUM in the ARC/INFO feature attribute tables contains the indicated numeric values to reference the tile within which a given feature falls.
HYSNUM QUAD NAME
126 124 122 120W
42N _____ OREGON _____ 1 CRESCENT CITY
| ZF | WE | AC | 2 WEED
| 1 | 2 | 3 | N 3 ALTURAS
41 |_____|_____|_____| E 4 EUREKA
| EA | RD | XJ | V 5 REDDING
| 4 | 5 | 6 | A 6 SUSANVILLE
40 |_____|_____|_____| D 7 UKIAH
| UK | CQ | A 8 CHICO
| 7 | 8 | 118 9 SANTA ROSA
39 |_____|_____|_____ 10 SACRAMENTO
| X9 | SO | WK | 11 WALKER LAKE
| 9 | 10 | 11 | 116 12 SAN FRANCISCO
38 |_____|_____|_____|_____ 13 SAN JOSE
| SF | SJ | MZ | GU | 14 MARIPOSA
| 12 | 13 | 14 | 15 | 15 GOLDFIELD
37 |_____|_____|_____|_____| 16 (no USGS name)
| SX | ZP | FO | DV | 17 MONTEREY
| 16 | 17 | 18 | 19 | 114 18 FRESNO
36 |_____|_____|_____|_____|_____ 19 DEATH VALLEY
| SL | BF | TJ | KI | 20 SAN LUIS OBISPO
| 20 | 21 | 22 | 23 | 21 BAKERSFIELD
35 |_____|_____|_____|_____| A 22 TRONA
| SM | LA | SB | NE | R 23 KINGMAN
| 24 | 25 | 26 | 27 | I 24 SANTA MARIA
34 |_____|_____|_____|_____| Z 25 LOS ANGELES
| SV | LB | SN | S6 | O 26 SAN BERNARDINO
| 28 | 29 | 30 | 31 | N 27 NEEDLES
33 |_____|_____|_____|_____| A 28 SANTA ROSA ISLAND
| SD | EL | 29 LONG BEACH
| 32 | 33 | 30 SANTA ANA
32 |--------------| 31 SALTON SEA
MEXICO 32 SAN DIEGO
33 EL CENTRO
Each quad covers an area one degree of latitude by two degrees of longitude, except as noted: ZF, WE, AC, XJ, DV and CQ coverage boundaries have been extended to include hydrographic features between the quad lines and the State Boundary;
SD and SV include Channel Islands;
-----
DATA CONTACTS:
Contact Name: Virginia Wong-Coppin (Teale Data Center)
Contact's Phone: 916-263-1489
Contact Name: Paul Veisze (California Department of Fish and Game)
Contact's Phone: 916-323-1667
DOCUMENTATION DATES: 10/1995, 7/1996, 8/1996, 10/1996, 2/1997, 10/28/1997
3/6/1998 (addition of statewide coverages)
5/11/1998 (attribute updates in 6 quad coverages
and in the statewide polygon coverage)
February 2002: Reprojected to UTM NAD27 (no shift), and clipped to KRIS Project study area.
Contact Name: P. J. Trichilo
Institute for Fisheries Resources (IFR)
791 Eighth Street
Arcata, CA 95521
Contact's Phone: (707) 822-9428