Lakes, 1 to 1,000,000

Metadata also available as

Frequently anticipated questions:


What does this data set describe?

Title: Lakes, 1 to 1,000,000
Abstract:
The Alaska Department of Natural Resources (ADNR) has combined lakes for several Digital Chart of the World (DCW) tiles into one coverage. The coverage was clipped to the State of Alaska boundary.
The lake data were combined from the DNNET coverages comprising the following 5 degree by 5 degree tiles for Alaska:
AK 12,22,23,32,33 AL 21,31,32 BK 12,13,22,23,33 BL 11,12,13,21,22,23,31,32,33 CK 12,23,33 CL 11,12,13,21,22,23,31 DK 12,13,22,23 ZK 22,32
Please note: Portions of this product include intellectual property of ESRI and are used herin with permission. Copyright (c) 1992 Environmental Systems Research Institute, Inc. All rights reserved. <URL:http://www.asgdc.state.ak.us/homehtml/esri.htm>License Agreement
Supplemental_Information:
Revisions: 02/26/98 D. Mortenson Renamed from DCW_LAKES to LK1MIL
To use the ARCs for this coverage: ---------------------------------- UNSEL $DCW_LAKES line dnlntype = 99 (this will remove all connectors between lakes-rivers)
To use the POLYs for this coverage: ----------------------------------- RESEL $DCW_LAKES poly type = 'L' (this will select all the LAKE polys)
UNSEL $DCW_LAKES poly type = 'I' (this will unselect all the ISLAND polys)
  1. How should this data set be cited?

    AK Department of Natural Resources, Land Records Information Section, 1998, Lakes, 1 to 1,000,000: Physical lk1mil, ADNR, LRIS, Anchorage, AK.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -180.000000
    East_Bounding_Coordinate: 180.000000
    North_Bounding_Coordinate: 71.342806
    South_Bounding_Coordinate: 49.376775

  3. What does it look like?

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

    Calendar_Date: 1991
    Currentness_Reference: publication date

  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):

      • Complete chain (12670)
      • Label point (10030)
      • GT-polygon composed of chains (10030)
      • Point (4)
      • Label point (271)

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

      The map projection used is Albers Conical Equal Area.

      Projection parameters:
      Standard_Parallel: 55.000000
      Standard_Parallel: 65.000000
      Longitude_of_Central_Meridian: -154.000000
      Latitude_of_Projection_Origin: 50.000000
      False_Easting: 0.000000
      False_Northing: 0.000000

      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 0.002334
      Ordinates (y-coordinates) are specified to the nearest 0.002334
      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 6378137.000000.
      The flattening of the ellipsoid used is 1/298.257222.

  7. How does the data set describe geographic features?

    lk1mil.aat
    arc attribute table (Source: ESRI)

    FID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    Shape
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    FNODE#
    Internal node number for the beginning of an arc (from-node). (Source: ESRI)

    Whole numbers that are automatically generated.

    TNODE#
    Internal node number for the end of an arc (to-node). (Source: ESRI)

    Whole numbers that are automatically generated.

    LPOLY#
    Internal node number for the left polygon. (Source: ESRI)

    Whole numbers that are automatically generated.

    RPOLY#
    Internal node number for the right polygon. (Source: ESRI)

    Whole numbers that are automatically generated.

    LENGTH
    Length of feature in internal units. (Source: ESRI)

    Positive real numbers that are automatically generated.

    LK1MIL#
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    LK1MIL-ID
    User-defined feature number. (Source: ESRI)

    User-defined feature ID

    LENGTH_MILES
    Length of arc segment in miles (Source: Calculated from item LENGTH)

    calculated value

    DNLNTYPE
    feature type (Source: ESRI DCW)

    ValueDefinition
    2Inland water - non-perennial
    99None

    DNLNSTAT
    feature status (Source: ESRI DCW)

    ValueDefinition
    3Definite (used for inland shorelines only)
    99None - no status attribute associated w/ feature

    lk1mil.pat
    polygon attribute table (Source: ESRI)

    FID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    Shape
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    AREA
    Area of feature in internal units squared. (Source: ESRI)

    Positive real numbers that are automatically generated.

    PERIMETER
    Perimeter of feature in internal units. (Source: ESRI)

    Positive real numbers that are automatically generated.

    LK1MIL#
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    LK1MIL-ID
    User-defined feature number. (Source: ESRI)

    User-defined feature ID

    ACRES
    Area of polygon in acres (Source: calculated from item AREA)

    calculated value

    PERIM_MILES
    Perimeter of polygon in miles (Source: calculated from item PERIMETER)

    calculated value

    TYPE
    Feature type (Source: ESRI DCW)

    ValueDefinition
    IIslands
    LLakes

    Entity_and_Attribute_Overview:
    POLYGONS - CODE DESCRIPTION -------- ----------- I Islands L Lakes
    ARCS - DNLNTYPE DESCRIPTION -------- ----------- 2 Inland water - non-perennial. This category includes the following ONC features: Lakes, non-perennial; Wadi; Sabkha Canals, navigable, abandoned Streams, non-perennial Streams, seasonally fluctuating, wul Streams, seasonally fluctuating, mbl 99 None
    DNLNSTAT DESCRIPTION -------- ----------- 3 Definite (used for inland shorelines only) 99 None - no status attribute associated w/ feature.
    Entity_and_Attribute_Detail_Citation:
    The Digital Chart of the World for use with Arc/Info, Environmental Systems Research Institute, Inc. 1991


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?

    Environmental Systems Research Institute

  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?

ANDR's purpose for modifying this information was for mapping a physical base at 1:1,000,000.


How was the data set created?

  1. From what previous works were the data drawn?

    ESRI DCW - DNNET (source 1 of 1)
    Environmental Systems Research Institute, Inc, 1991, Digital Chart of the World, Drainage: ESRI, Redlands, CA.

    Type_of_Source_Media: unknown
    Source_Scale_Denominator: 1000000
    Source_Contribution:
    The DCW DNNET data was the starting base for the statewide lakes coverage. The primary source of the DCW is the US Defense Mapping Agency (DMA) Operational Navigation Chart (ONC) series.

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

    Date: 1994 (process 1 of 2)
    See Abstract and Supplimental_Information.

    Date: 28-Jun-2001 (process 2 of 2)
    NPS uses PDS.AML to additem and calculate LENGTH_MILES for arcs and ACRES and PERIM_MILES for polygons. The coverage is then projected to Geographic decimal degree coordinates on the Clarke 1866 spheroid.

    Person who carried out this activity:

    GIS Team
    National Park Service, Alaska Regional Office
    GIS Specialist
    240 W 5th Ave.
    Anchorage, Alaska 99501
    USA

    Please contact us via email. (voice)
    (907) 264-5428 (FAX)
    AKRO_Internet_Contact@nps.gov

    Hours_of_Service: 8:00am- 5:00pm AST
    Data sources used in this process:
    • DNR

    Data sources produced in this process:

    • LK1MIL

  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?

    Unknown

  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?

    Unknown

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

    Polygon and 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: None
Use_Constraints:
It is not recommended the data be used at a scale larger than 1:1,000,000.
Any hardcopies or published datasets 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. User specifically agrees not to misrepresent these data sets, nor to imply that changes they made were approved by the Alaska Department of Natural Resources.
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.

  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 14:06:43 2017