ANCSA Core Townships

Metadata also available as

Frequently anticipated questions:


What does this data set describe?

Title: ANCSA Core Townships
Abstract:
Spatial representation of the ANCSA core townships as set aside by Sections 12(a), 12(b), and 16(b) of the Alaska Native Claims Settlement Act.
  1. How should this data set be cited?

    Bureau of Land Management Alaska State Office, 20070914, ANCSA Core Townships.

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -174.276710
    East_Bounding_Coordinate: -131.502397
    North_Bounding_Coordinate: 71.381732
    South_Bounding_Coordinate: 52.156383

  3. What does it look like?

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

    Calendar_Date: unknown
    Currentness_Reference: 20060501

  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):

      • G-polygon (246)

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

      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.000000335276147. Longitudes are given to the nearest 0.000000335276147. Latitude and longitude values are specified in Decimal degrees.

      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?

    ANCSA_Core_Townships
    ANCSA Core Townships (Source: BLM-Alaska Land Information System)

    objectid
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    twp_tin_no
    Township Index Number (Source: BLM-Alaska)

    varies with MTR

    mtr
    Meridian Township Range (Source: BLM PLSS)

    Varies

    village
    Village Name (Source: BLM Alaska Land Information System)

    ValueDefinition
    (Upper) Kalskag,Afognak,Akhiok,Akiachak,Akiak,Akutan,Alakanuk,Alatna,Aleknagik,Allakaket,Ambler,Anaktuvuk Pass,Andreafsky,Angoon,Aniak,Anvik,Atka,Atmautlauk,Atqasuk,Ayakulik,Barrow,Beaver,Belkofski,Bethel,Bill Moore?s Slough,Birch Creek,Brevig Mission,Buckland,Cantwell,Chalkyitsik,Chefornak,Chenega,Chevak,Chickaloon,Chignik,Chignik Lagoon,Chignik Lake,Chistochina,Chitina,Chuathbaluk,Chuloonawik,Circle,Clarks Point,Copper Center,Council,Craig,Crooked Creek,Deering,Dillingham,Dot Lake,Eagle,Eek,Egegik,Eklutna,Ekuk,Ekwok,Emmonak,English Bay,Evansville,Eyak,False Pass,Ft. Yukon,Gakona,Galena,Georgetown,Golovin,Goodnews Bay,Grayling,Gulkana,Hamilton,Healy Lake,Holy Cross,Hoonah,Hooper Bay,Hughes,Huslia,Hydaburg,Igiungig,Iliamna,Inalik,Ivanoff Bay,Kaguyak,Kake,Kaktovik,Kaltag,Karluk,Kasaan,Kasigluk,Kiana,King Cove,King Island,Kipnuk,Kivalina,Klawock,Knik,Kobuk,Kokhanok,Koliganek,Kongiganek,Kotlik,Kotzebue,Koyuk,Koyukuk,Kwethluk,Kwigillingok,Larsen Bay,Levelock,Lime Village,Lower Kalskag,Manley Hot Springs,Manokotak,Marshall,Marys Igloo,McGrath,Mekoryuk,Mentasta Lake,Minto,Mountain Village,Naknek,Napaimute,Napakiak,Napaskiak,Nelson Lagoon,Nenana,New Stuyahok,Newhalen,Newtok,Nightmute,Nikolai,Nikolski,Ninilchik,Noatak,Nome,Nondalton,Noorvik,Northway,Nuiqsut,Nulato,Nunapitchuk,Ohogamiut,Old Harbor,Oscarville,Ouzinkie,Paimuit,Pauloff Harbor,Pedro Bay,Perryville,Pilot Point,Pilot Station,Pitkas Point,Platinum,Point Hope,Point Lay,Port Graham,Port Heiden,Port Lions,Portage Creek,Quinhagak,Rampart,Red Devil,Ruby,Russian Mission,Salamatof,Sand Point,Saxman,Scammon Bay,Selawik,Seldovia,Shageluk,Shaktoolik,Sheldon's Point,Shishmaref,Shungnak,Sleetmute,Solomon,South Naknek,St. George,St. Mary's,St. Michael,St. Paul,Stebbbins,Stevens Village,Stony River,Takotna,Tanacross,Tanana,Tatitlek,Tazlina,Telida,Teller,Togiak,Toksook Bay,Tuluksak,Tuntutuliak,Tununak,Twin Hills,Tyonek,Uganik,Ugashik,Umkumiute,Unalakleet,Unalaska,Unga,Uyak,Wainwright,Wales,White Mountain,Woody Island,YakutatVillage Names

    region_corp
    ANCSA Region Corporation (Source: BLM Alaska Land Information System)

    ValueDefinition
    Ahtna,Aleut,Arctic Slope,Bering Straits,Bristol Bay,Calista,Chugach,Cook Inlet,Doyon,Koniag,NANA,SealaskaANCSA Region Corporation

    base_serial_num
    Base Serial Number for Selection (Source: BLM Alaska Land Information System)

    Varies

    shape
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    corp_name
    Village Corporation Name (Source: BLM Alaska Land Information System)

    ValueDefinition
    Afognak Native Corporation,Ahtna, Inc.,Akhiok-Kaguyak, Inc.,Akiachak, Limited,Akutan Corporation,Alakanuk Native Corporation,Alaska Peninsula Corporation,Aleknagik Natives Limited,Arviq Incorporated,Askinuk Corporation,Atmautlauk, Limited,Atqasuk Corporation,Atxam Corporation,Ayakulik, Inc.,Azachorok, Inc.,Baan O Yeel Kon Corporation,Bay View, Inc.,Bean Ridge Corporation,Beaver Kwit'chin Corporation,Becharof Corporation,Belkofski Corporation,Bethel Native Corporation,Brevig Mission Native Corporation,Cape Fox Corporation,Chalkyitsik Native Corporation,Chaluka Corporation,Chefarnrmute, Inc.,Chevak Company,Chickaloon-Moose Creek Native Assn.,Chignik Lagoon Native Corporation,Chignik River Limited,Chinuruk Inc.,Chinuruk, Inc.,Chitina Native Corporation,Choggiung Limited,Choggiung, Limited,Chuloonawik Corporation,Council Native Corporation,Cully Corporation, Inc.,Danzhit Hanlaii Corporation,Deloy Ges, Incorporated,Dineega Corporation,Dinyea Corporation,Doleoycheet, Inc.,Dot Lake Native Corporation,Eklutna, Inc.,Ekwok Native Limited,Emmonak Corporation,Evansville, Inc.,Far West, Incorporated,Gana'a'Yoo, Limited,Gana-a'Yoo, Limited,Golovin Native Corporation,Gwitchyaazhee Corporation,Haida Corporation,Hee-Yea-Lingde Corporation,Huna Totem Corporation,Hungwitchin Corporation,Igiugig Native Corporation,Iliamna Natives Limited,Inalik Native Corporation,Iqfijouaq Company,Isanotski Corporation,K'oyitl'ots'ina, Limited,Kake Tribal Corporation,Kaktovik Inupiat Corporation,Kasigluk Incorporated,Kavilco, Incorporated,Kijik Corporation,Kikiktagruk Inupiat Corporation,King Island Native Corporation,Klawock Heenya Corporation,Knikatnu, Inc.,Kokarmuit Corporation,Koliganek Natives Limited,Kongnikilnomuit Yuita Corp.,Koniag, Inc.,Kootznoowoo, Inc.,Kotlik Yupik Corporation,Koyuk Native Corporation,Kugkaktlik Limited,Kuitsarak Incorporated,Kuukpik Corporation, Inc.,Kwethluk Incorporated,Kwik Incorporated,Leisnoi, Inc.,Levelock Natives Limited,Lime Village Company,MTNT, Ltd,Manokotak Natives Limited,Marys Igloo Native Corporation,Maserculiq Incorporated,Mendas Cha-Ag Native Corporation,NANA Regional Corporation, Inc.,Napakiak Corporation,Napaskiak Corporation,Nelson Lagoon Corporation,Nerklikmute Native Corporation,Newtok Corporation,Nima Corporation,Ninilchik Natives Association, Inc.,Northway Natives, Inc.,Nunakauiak Yupik Corporation,Nunamiut Corporation, Inc.,Nunapiglluraq Corporation,Nunapitchuk Limited,OHOG, Incorporated,Oceanside Corporation,Old Harbor Native Corporation,Olgoonik Corporation, Inc.,Oscarville Native Corporation,Ounalashka Corporation,Ouzinkie Native Corporation,Paimuit Corporation,Paug-Vik Incorporated, Limited,Pedro Bay Corporation,Pilot Point Native Corporation,Pilot Station Native Corporation,Pitkas Point Native Corporation,Qanirtuuq Incorporated,Qemirtalek Coast Corporation,Qinarmiut Corporation,Russian Mission Native Corporation,Saguyak, Incorporated,Salamatof Native Association, Inc.,Sanak Corporation,Sea Lion Corporation,Seldovia Native Association, Inc.,Seth-de-ya-ah Corporation,Shaan-Seet Incorporated,Shaktoolik Native Corporation,Shishmaref Native Corporation,Shumagin Corporation,Sitnasuak Native Corporation,Solomon Native Corporation,St. George Tanaq Corporation,St. Mary's Native Corporation,St. Michael Native Corporation,Stebbins Native Corporation,Stuyahok Limited,Swan Lake Corporation,Tanacross Incorporated,Tanadgusix Corporation,Teller Native Corporation,The Chenega Corporation,The English Bay Corporation,The Eyak Corporation,The King Cove Corporation,The Kuskokwim Corporation,The Kuskowim Corporation,The Port Graham Corporation,The Tatitlek Corporation,Tigara Corporation,Tihteet'Aii, Inc.,Toghotthele Corporation,Togiak Natives Limited,Tozitna, Limited,Tulkisarmute Incorporated,Tununrmiut Rinit Corporation,Twin Hills Native Corporation,Tyonek Native Corporation,Uganik Native Inc.,Ukpeagvik Inupiat Corporation,Unalakleet Native Corporation,Unga Corporation,Uyak Natives Inc.,Wales Native Corporation,White Mountain Native Corporation,Yak-Tat Kwaan Incorporated,Zho-tse, IncorporatedANCSA Village Corporation Name

    description
    Township Description (Source: BLM-Alaska)

    Varies

    entitlement_12a
    ANCSA 12(a) Entitlement Acres (Source: Alaska Native Claims Settlement Act)

    Varies

    reallocation_12b
    ANCSA 12(b) Reallocation Acres (Source: Alaska Native Claims Settlement Act)

    Varies

    entitlement_16b
    ANCSA 16(b) Entitlement Acres (Source: Alaska Native Claims Settlement Act)

    Varies


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?

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

    Tim Varner
    Bureau of Land Management
    IT Specialist
    222 W. 7th Ave, #13
    Anchorage, AK 99513
    USA

    (907) 271-5799 (voice)
    tvarner@blm.gov


Why was the data set created?

This layer provides a spatial representation of the ANCSA core townships and the acreage entitlements by village name.


How was the data set created?

  1. From what previous works were the data drawn?

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

    Date: 23-Oct-2005 (process 1 of 1)
    1. Rewrote U:\WorkSpace\ANCSA_Village_Corp\ANCSA Core Townships\CoreTownships.doc as an Excel spreadsheet 2. Save as a comma-delimited file. 3. Joined mtr column to statewide township protraction spatial data - used keep only matching records option. 4. Saved resulting layer as ANCSA_core_twps layer as ArcSDE feature class.

    Person who carried out this activity:

    Tim Varner
    Bureau of Land Management
    IT Specialist
    222 W. 7th Ave #13
    Anchorage, AK 99513
    USA

    (907) 271-5799 (voice)
    tvarner@blm.gov

  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?

    Attributes assigned to this coverage are defined in the Informix tables. The twpgrid coverage is joined to the Informix tables by means of a unique identifier.
    Attributes are extracted from the Informix tables and joined with the coverage features to ensure referential integrtity with the database. Spot checks were performed to verify attribute accuracy.

  2. How accurate are the geographic locations?

    This data set is constructed from the protracted township grid. Accuracy is derived from that data source and is shown below:
    The accuracy of the coordinates in this data is absolute due to their theoretical nature, however the source data shows values to the nearest fraction of a second of latitude or longitude as follows:
    1. Township Corners:
    0.001" as shown on or calculated from official protraction diagrams, except Umiat Meridian latitudes where they are 0.01".
    2. Section Corners:
    0.00001" as calculated to preserve angularity and distance.
    3. Points along Alaskan-Canadian Boundaries:
    3a. For points between Tongass Passage and Mt. St. Elias (not including Boundary Point 187), 0.01" as shown in U.S. Department of State, International Boundary Commission (IBC) publication "JOINT REPORT UPON THE SURVEY AND DEMARCATION OF THE BOUNDARY BETWEEN CANADA AND THE UNITED STATES FROM TONGASS PASSAGE TO MOUNT ST. ELIAS, 1952."
    3b. For points between Mt. St. Elias and the Arctic Ocean (including Boundary Point 187), 0.00001" to preserve backwards compatibility with National Geodetic Reference Datum of 1983 using U.S., Department of Commerce, National Geodetic Survey (NGS) computer program NADCON version 2.1.

  3. How accurate are the heights or depths?

    unknown

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

    There is a one-to-one relationship between each township in the spatial database and on the offical protraction diagrams

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

    Polygon topology is present. No intersection errors or label errors are present.


How can someone get a copy of the data set?

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

Access_Constraints:
Discretionary, contains no sensitive information - generally considered releasable.
Use_Constraints:
Any hardcopies or published datasets using this data shall clearly indicate their source.
Any users wishing to modify this data are obligated to report the extent of their modifications. User specifically agrees not to misrepresent modifications to this data, as approved or endorsed by the BLM.

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

    Tim Varner
    Bureau of Land Management
    IT Specialist
    222 W. 7th Ave, #13
    Anchorage, AK 99513
    USA

    (907) 271-5799 (voice)
    tvarner@blm.gov

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

    Downloadable Data

  3. What legal disclaimers am I supposed to read?

    No warranty is made by the Bureau of Land Management as to the accuracy, reliability, or completeness of these data for individual use or aggregate use with other data.

  4. How can I download or order the data?


Who wrote the metadata?

Dates:
Last modified: 07-Nov-2007
Last Reviewed: 07-Nov-2007
To be reviewed: 07-Nov-2008
Metadata author:
Bureau of Land Management
Attn: Tim Varner
IT Specialist
222 W. 7th Ave, #13
Anchorage, AK 99513
USA

(907) 271-5799 (voice)
tvarner@blm.gov

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 14:07:28 2017