Major Rivers, 1 to 2,000,000

Metadata also available as

Frequently anticipated questions:


What does this data set describe?

Title: Major Rivers, 1 to 2,000,000
Abstract:
Selected major rivers were extracted from all rivers and streams in the USGS 1:2,000,000 Digital Line Graphs (DLG) dataset. The major rivers include the Copper, Susitna, Kuskokwim, Yukon, Koyukuk, Kobuk, Noatak, and Colville Rivers. Set these rivers to the hierarchy attribute to "1". To access the complete statewide DLG dataset, refer to the "Rivers, 1:2,000,000" metadata.
New to this coverage is a second hierarchical level of streams. These streams were pulled from the 1995 navigability coverage. This coverage, however, does not represent which streams are considered navigable by the state. The second hierarchy was added for cartographic purposes only - to provide a more complete river drainage layer on statewide maps.
Supplemental_Information:
Procedures_Used: This coverage was updated for annotation purposes for the LDA maps in August & September 1992. The "Gulf of Alaska" anno was repositioned.
The origin of this coverage is USGS DLG data October 1990. The documentation notes from J. Tam indicate that the Copper--Noatak--and Colville Rivers were added in August 1991. J. Tam also created the ARC 6.0 anno subclass anno.times in July 1992. The notes indicate the anno subclass should be used with an DNR textset such as Annolevel 102 is for blue Palacio bold italic font.
Revisions: 2/23/98 D. Mortenson Renamed from majriv in Starter Kit or $HYDRO_ST in DNR working directories to rvr2milm. 2/26/98 - added the attribute hierarchy, and added a second level of streams selected from the 1995 navigable waters layer. This does NOT imply navigable waters as determined by the state. This edit work was done for cartographic purposes of the base map of Alaska.
These edits need to be made to HYDRO because MAJ = 0 and MIN = 0 indicate that the arcs were part of the original DLG "framework. SKR 10-24-92
ENTER COMMAND >sel HYDRO.AAT 5370 RECORD(S) SELECTED
ENTER COMMAND >RES MAJ = 0 20 RECORD(S) SELECTED
ENTER COMMAND >ASEL MIN = 0 20 RECORD(S) SELECTED
ENTER COMMAND >list HYDRO-ID-NUM-MAJ-MIN-MAJ2-MIN2 $RECNO HYDRO-ID NUM MAJ MIN MAJ2 MIN2 1 1-743 1743 0 0 0 0 2 1-742 1742 0 0 0 0 809 1-438 1438 0 0 0 0 813 1-437 1437 0 0 0 0 1053 2-985 2985 0 0 0 0 1054 2-986 2986 0 0 0 0 1064 3-333 3333 0 0 0 0 1065 3-334 3334 0 0 0 0 1825 3-258 3258 0 0 0 0 2228 2-991 2991 0 0 0 0 2230 2-990 2990 0 0 0 0 3187 2-996 2996 0 0 0 0 3189 2-995 2995 0 0 0 0 3191 3-004 3004 0 0 0 0 3193 3-003 3003 0 0 0 0 3304 976 976 0 0 0 0 3314 975 975 0 0 0 0 5368 1-088 5369 5-121 5370 5-121
--------------------------------------------------------------------
Edits on 2/28/94 - J. Tam Deleted first 18 arcs in above list - part of the original DLG framework. The last two arcs are patches to the Susitna River from the alaska coastline file - Arcedit: calc num = 5121 Arcedit: calc maj = 290 Arcedit: calc min = 3061 Arcedit: calc maj2 = 0 Arcedit: calc min2 = 0 Changed two arcs with min = 3916 - one to min = 3016 and the other to min = 3061.
  1. How should this data set be cited?

    AK Department of Natural Resources, Land Records Information Section, 1998, Major Rivers, 1 to 2,000,000: General Base Map or Physical rvr2milm, ADNR, LRIS, Anchorage, AK.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -168.24155836
    East_Bounding_Coordinate: -137.35464389
    North_Bounding_Coordinate: 69.95022646
    South_Bounding_Coordinate: 60.34070588

  3. What does it look like?

  4. Does the data set describe conditions during a particular time period?

    Calendar_Date: 1982
    Currentness_Reference: ground condition

  5. What is the general form of this data set?

    Geospatial_Data_Presentation_Form: vector digital data

  6. How does the data set represent geographic features?

    1. How are geographic features stored in the data set?

      This is a Vector data set. It contains the following vector data types (SDTS terminology):

      • String (5351)

    2. What coordinate system is used to represent geographic features?

      The map projection used is Albers Conical Equal Area.

      Projection parameters:
      Standard_Parallel: 55
      Standard_Parallel: 65
      Longitude_of_Central_Meridian: -154
      Latitude_of_Projection_Origin: 50
      False_Easting: 0.00000
      False_Northing: 0.00000

      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 1.0
      Ordinates (y-coordinates) are specified to the nearest 1.0
      Planar coordinates are specified in METERS

      The horizontal datum used is North American Datum of 1983.
      The ellipsoid used is Geodetic Reference System 80.
      The semi-major axis of the ellipsoid used is 6378206.4.
      The flattening of the ellipsoid used is 1/294.98.

  7. How does the data set describe geographic features?

    RVR2MILM.AAT
    arc attributes (Source: ARC/INFO)

    NUM
    not used (Source: unknown)

    ValueDefinition
    unknownunknown

    MAJ
    290 for hydro (Source: USGS)

    ValueDefinition
    See DLG publication.See DLG publication.

    MIN
    Ranges from 3001 to 3063 (Source: USGS)

    ValueDefinition
    See processing steps.See processing steps.

    MAJ2
    Zero (Source: USGS)

    ValueDefinition
    0unknown

    MIN2
    Zero (Source: USGS)

    ValueDefinition
    0unknown

    HIERARCHY
    Major river and tributaries. (Source: DNR)

    ValueDefinition
    1 = major 2 = tributary to majorsee above

    Entity_and_Attribute_Overview:
    Used the MIN to reselect the appropriate rivers.
    ANNOTATION subclass annosymbols description
    BLK8X11 15 black times italic;river names;8x11 maps ANNO2MIL 615;617 cyan times italic;river names CYAN8X11 615 cyan times italic;river names;8x11 maps OFF_BLK 115;117 black times italic;offshore waterbody names TIMESGRAY 17 black times bold italic;river names OFF_CYAN 615;617 cyan times italic;offshore waterbody names
    Entity_and_Attribute_Detail_Citation: See USGS Circular 895


Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)

  2. Who also contributed to the data set?

    US Geological Survey

  3. To whom should users address questions about the data?

    GIS Public Access Coordinator
    AK Department of Natural Resources - Land Records Information Section
    GIS Public Access Coordinator
    550 W. 7th Suite 706
    Anchorage, AK 99501
    USA

    907 269 8833 (voice)
    907 269 8920 (FAX)
    gis_public_access@dnr.state.ak.us

    Hours_of_Service: 800-1600 AST
    Contact_Instructions: See Distribution_Information


Why was the data set created?

The purpose of this coverage is to map the major streams without the burden of reselecting or mapping all other streams. Though the resolution is 1:2,000,000, it is ideal for general river reference for mapping 8.5" x 11" maps of the state; The user should reselect for hierarchy = "1" for this scale of mapping.


How was the data set created?

  1. From what previous works were the data drawn?

    DLG (source 1 of 1)
    Survey, US Geological , 1982, US Geological Survey Circular 895, Digital Line Graphs from 1:2,000,000-Scale Maps: USGS, Unknown.

    Type_of_Source_Media: DLG
    Source_Scale_Denominator: 2000000
    Source_Contribution: Starting information for reselection.

  2. How were the data generated, processed, and modified?

    Date: 23-Oct-1990 - See Revisions. (process 1 of 3)
    Reselected rivers where the MIN value ranges between 3001 and 3063 (but not inclusive of all between 3001 and 3063):
    3001 River/stream (double line, shoreline) 3002 River/stream (double line, centerline) 3003 River/stream (single line), perennial, length < 20 km, or 12 miles 3004 River/stream (single line), perennial, length 20 =< 30 km, or 12=< 19 mi 3005 River/stream (single line), perennial, length 30 =< 40 km, or 19=< 25 mi 3006 River/stream (single line), perennial, length 40 =< 50 km, or 25=< 31 mi 3007 River/stream (single line), perennial, length 50 =< 60 km, or 31=< 37 mi 3008 River/stream (single line), perennial, length 60 =< 80 km, or 37=< 50 mi 3009 River/stream (single line), perennial, length 80 =< 100 km, or 50=< 62 mi 3010 River/stream (single line), perennial, length 100 =< 125 km, or 62=< 78 mi 3011 River/stream (single line), perennial, length 125 =< 150 km, or 78=< 93 mi 3012 River/stream (single line), perennial, length 150 =< 200 km, or 93=< 124 mi 3013 River/stream (single line), perennial, length 200 =< 250 km, or 124=< 155 mi 3014 River/stream (single line), perennial, length 250 =< 300 km, or 155=< 186 mi 3016 River/stream (single line), perennial, length 350+ km, or 217+ mi 3035 River/stream, centerline in water body, perennial, length <2km, or <1 mi 3036 River/stream, centerline in water body, perennial, length 2=<4 km, or 1=<2 mi 3037 River/stream, centerline in water body, perennial, length 4=<6 km, or 2=<4 mi 3038 River/stream, centerline in water body, perennial, length 6=<8 km, or 4=<5 mi 3040 River/stream, centerline in water body, perennial, length 10=<15 km, or 6=<9 mi 3041 River/stream, centerline in water body, perennial, length 15=<20 km, or 9=<12 mi 3060 Braided stream, average width of braid 16+ km, or 4+ mi 3061 Braided stream, average width of braid 0=<2 km, or 0=<1 mi 3062 Braided stream, average width of braid 2=<4 km, or 1=<2 mi 3063 Braided stream, average width of braid 4=<6 km, or 2=<4 mi

    Date: 27-Feb-1998 - See Revisions. (process 2 of 3)
    Added selected streams from the navskr or $nav_riv coverage. Deleted the centerline in water body streams. Added the code HIERARCHY. Those streams in the original version are coded "1", those added on 02/27/98 are coded "2". The purpose was to add more flexibility to the Major Rivers layer, and reduce the number of other coverages. It should be noted there is a more current (1997) navigability layer being developed by the Division of Land.

    Date: Jun-1998 (process 3 of 3)
    Added a couple polygons for wide rivers (North Slope area).

  3. What similar or related data should the user be aware of?


How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?

    Please see USGS Circular 895 publication.

  2. How accurate are the geographic locations?

    Unknown

  3. How accurate are the heights or depths?

  4. Where are the gaps in the data? What is missing?

    Only selected major rivers are included.

  5. How consistent are the relationships among the observations, including topology?

    Chain-node topology present.


How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints:
To ensure distribution of the most current public information, please refer requests for data or products to the Alaska Department of Natural Resources, Land Records Information Section.
Use_Constraints:
It is not recommended the data be used at a scale larger than 1:2,000,000.
Any hardcopies utilizing these data sets shall clearly indicate their source. If the user has modified the data in any way they are obligated to describe the types of modifications they have performed on the hardcopy map. User specifically agrees not to misrepresent these data sets, nor to imply that changes they made were approved by Alaska Department of Natural Resources.
SPECIAL NOTE: Some of the information here was selected from the 1995 navigable waters layer. This layer was never a final dataset representing the navigable waters, and should not be used as a source for rivers considered navigable by the state.

  1. Who distributes the data set? (Distributor 1 of 1)

    Alaska Department of Natural Resources - Land Records Information Section
    GIS Public Access Coordinator
    550 W. 7th Suite 706
    Anchorage, AK 99501
    USA

    907 269 8833 (voice)
    907 269 8920 (FAX)

  2. What's the catalog number I need to order this data set?

    Downloadable Data

  3. What legal disclaimers am I supposed to read?

    The State of Alaska makes no express or implied warranties (including warranties of merchantability and fitness) with respect to the character, function, or capabilities of the electronic services or products or their appropriateness for any users purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products, any failure thereof or otherwise, and in no event will the State of Alaska's liability to the requestor or anyone else exceed the fee paid for the electronic service or product.

  4. How can I download or order the data?


Who wrote the metadata?

Dates:
Last modified: 19-Jan-2005
Metadata author:
Alaska Department of Natural Resources - Land Records Information Section
Attn: Marty Martin
GIS Data Administrator
550 W 7th Ave., Suite 706
Anchorage, AK 99501

907 269 8837 (voice)
marty_martin@dnr.state.ak.us

Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
Metadata extensions used:


Generated by mp version 2.9.12 on Thu Mar 09 14:07:43 2017