USGS Quadrangle Boundaries for 1 to 250,000 topographic maps

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Frequently-anticipated questions:

What does this data set describe?

Title: USGS Quadrangle Boundaries for 1 to 250,000 topographic maps
Abstract:
This coverage contains the boundaries of the USGS protracted 1:250,000 quadrangle maps covering Alaska. It also includes annotaiton for the quadrangle names in the annotation subclass qmqanno. This coverage was dissolved from another coverage named "itma", which consists of the USGS protracted 1:63,360 quad sheets covering Alaska. The coverage contains tic locations for both the USGS protracted 1:250,000 and 1:63,360 quadrangle corners. Each tic-id is equal to its longitude and latitud in degrees and mintues. Seconds are not included to the tic-id (due to limited number of digits allow for tic-ids), but were used to position the tics on each quad corner. There are negative tic-ids for all the 1:63,360 quads west of the 180° degrees, i.e. Attu, Kiska, and the Rat Islands.
The source for the corner coordinates was provided by the Bureau of Land Management (BLM) AEH files. DNR computer programs were used to convert the corner locations into ARC/INFO coverages. The unique tic numbering system, which is tied to each corner, allows for the future development of statewide digital libraries using these boundaries as reference tiles.
Supplemental_Information:
Revisions: Modification: 1/24/94 - D. Mortenson Annotation added to coverage using the 6.0 fonts. Annotation is in qmqanno subclass using annosymbol 6 and was originally done by J. Tam.
Modification: 8/25/95 - R. Van Pelt To correct bad TIC -- $RECNO 3233. Methodology 1. Determined tic location from ITMA by building for NODE and selecting appropriate node to get X -- Y coordinates. 2. In INFO SEL .TIC file and RES $RECNO = 3233 CALCULATE IDTIC = 166306530 CALCULATE XTIC = -575816.210 CALCULATE YTIC = 1781155.129
Modification: 10/4/95 - R. Van Pelt To correct south boundary of KENAI Quadrangle. Methodolgy: 1. Corrected placement of south boundary of KENQ8 in ITMA (see ITMA documentation for details). 2. In AE: set BC ITMA with BE ARC NODE; SPLIT ARC at NODE locations; SELected ARC and DELETEd; set EC ITMA ARC; SELected ARC; PUT QMQA; set EC QMQA ARC; SELected 3 ARCs; CALC $ID = 99; UNSPLIT; CALC $ID = 1; SAVE; QUIT; in ARC BUILD. 3. In INFO ALTERed the QMQA.TIC IDTIC OUTPUT WIDTH to 10 so the IDTIC displays.
Modification: 05/10/96 - D. Mortenson Extented a portion of the Sutwik Island quad to include all islands. Previous versions contained this extention- however- it did not go south quite far enough.
Modification: 6/10/97 - M. Gorham Extended a portion of the Ketchikan quad to include area around Camp Pt. along the Portland Canal.
Modification: 6/17/97 - M. Gorham Straightened boundary between Iliamna and Seldovia quads so it runs along 153 for entire boundary.
  1. How should this data set be cited?

    Bureauf of Land Management, 2008, USGS Quadrangle Boundaries for 1 to 250,000 topographic maps: Base 3 qmqa, ADNR, LRIS, Anchorage, AK.

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -180.000000
    East_Bounding_Coordinate: 180.000000
    North_Bounding_Coordinate: 72.029915
    South_Bounding_Coordinate: 48.157751

  3. What does it look like?

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

    Calendar_Date: 2008
    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):

      • G-polygon (153)
      • String (357)
      • GT-polygon composed of chains (154)

    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 1
      Ordinates (y-coordinates) are specified to the nearest 1
      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?

    qmqNAD83
    polygon attributes (Source: ArcGIS)

    objectid
    Internal feature number. (Source: ESRI)

    Coordinates defining the features.

    shortname
    Abbreviated code representing 1:250,000 quads (Source: unknown)

    ValueDefinition
    ADK - ADAK, AFG - AFOGNAK, AMK - AMUKTA, AMR - AMBLER RIVER, ANC - ANCHORAGE, ARC - ARCTIC, ATK - ATKA, ATL - ATLIN, ATU - ATTU, BAR - BARROW, BEN - BENDELEBEN, BET - BETTLES, BLK - BLACK, BLR - BLACK RIVER, BRL - BARTER ISLAND, BTH - BETHEL, BVR - BEAVER, CAN - CANDLE, CHK - CHIGNIK, CHN - CHANDALAR, CHR - CHARLEY RIVER, CIR - CIRCLE, COL - COLEEN, COR - CORDOVA, CRG - CRAIG, CRS - CHRISTIAN, DEL - DE LONG MTS, DIL - DILLINGHAM, DIX - DIXON ENTRANCE, EAG - EAGLE, FAI - FAIRBANKS, FYU - FORT YUKON, GDN - GOODNEWS BAY, GUL - GULKANA, HAR - HARRISON BAY, HEA - HEALY, HUG - HUGHES, IDT - IDITAROD, IKR - IKPIKPUK RIVER, ILI - ILIAMNA, JUN - JUNEAU, KAG - KAGUYAK, KAR - KARLUK, KAT - KATEEL RIVER, KEN - KENAI, KET - KETCHIKAN, KIR - KILLIK RIVER, KIS - KISKA, KOD - KODIAK, KTZ - KOTZEBUE, KWI - KWIGUK, LIM - LIME HILLS, LIV - LIVENGOOD, MAR - MARSHALL, MCG - MC GRATH, MED - MEDFRA, MIS - MISHEGUK MTN, MLZ - MELOZITNA, MMK - MT MC KINLEY, MSE - MT ST ELIAS, NAB - NABESNA, NAK - NAKNEK, NOA - NOATAK, NOB - NORTON BAY, NOM - NOME, NUL - NULATO, OPH - OPHIR, PET - PETERSBURG, PSM - PHILIP SMITH MTS, RAT - RAT ISLAND, RUB - RUBY, RUS - RUSSIAN MISSION, SAG - SAGAVANIRKTOK, SAM - SAMALGA ISLAND, SEG - SEGUAM, SEL - SELDOVIA, SEW - SEWARD, SHF - SHISHMAREF, SHU - SHUNGNAK, SIT - SITKA, SKG - SKAGWAY, SLK - SELAWIK, SLT - SLEETMUTE, SMI - ST MICHAEL, SOL - SOLOMON, SUM - SUMDUM, SUT - SUTWIK ISLAND, TAB - TABLE MTN, TAL - TALKEETNA, TAN - TANANA, TAY - TAYLOR MTS, TEL - TELLER, TES - TESHEKPUK, TLM - TALKEETNA MTS, TNX - TANACROSS, TYO - TYONEK, UGA - UGASHIK, UKT - UNALAKLEET, UMI - UMIAT, UMK - UMNAK, UNI - UNIMAK, UNL - UNALASKA, VAL - VALDEZ, WAI - WAINWRIGHT, WIS - WISEMAN, XBB - BRISTOL BAY, XBC - BRADFIELD CANAL, XBD - BIG DELTA, XBG - BERING GLACIER, XBI - BAIRD INLET, XBM - BAIRD MTS, XBP - BEECHEY POINT, XBS - BLYING SOUND, XCL - CHANDLER LAKE, XCM - CAPE MENDENHALL, XDP - DEMARCATION POINT, XFI - FLAXMAN ISLAND, XFP - FALSE PASS, XFR - COLD BAY, XGI - GARELOI ISLAND, XHB - HOOPER BAY, XHC - HOLY CROSS, XHI - HAGEMEISTER ISLAND, XHP - HOWARD PASS, XIB - ICY BAY, XKB - KUSKOKWIM BAY, XKR - KANTISHNA RIVER, XLC - LAKE CLARK, XLR - LOOKOUT RIDGE, XMC - MC CARTHY, XMF - MT FAIRWEATHER, XMH - MT HAYES, XMI - MIDDLETON ISLAND, XMK - MT KATMAI, XMM - MT MICHELSON, XMR - MEADE RIVER, XNB - NUSHAGAK BAY, XNI - NUNIVAK ISLAND, XPA - PORT ALEXANDER, XPH - POINT HOPE, XPI - PRIBILOF ISLANDS, XPL - POINT LAY, XPM - PORT MOLLER, XPR - PRINCE RUPERT, XSB - STEPOVAK BAY, XSI - SIMEONOF ISLAND, XSL - ST LAWRENCE, XSM - ST MATTHEW, XSP - SURVEY PASS, XTI - TRINITY ISLANDS, XTR - TAKU RIVER, XUR - UTUKOK RIVER, YAK - YAKUTAT,1:250K shortname and full name of quadrangle

    tile_name
    Abbreviated name of 1:250K quadrangle (Source: unknown)

    ValueDefinition
    ADK - ADAK, AFG - AFOGNAK, AMK - AMUKTA, AMR - AMBLER RIVER, ANC - ANCHORAGE, ARC - ARCTIC, ATK - ATKA, ATL - ATLIN, ATU - ATTU, BAR - BARROW, BEN - BENDELEBEN, BET - BETTLES, BLK - BLACK, BLR - BLACK RIVER, BRL - BARTER ISLAND, BTH - BETHEL, BVR - BEAVER, CAN - CANDLE, CHK - CHIGNIK, CHN - CHANDALAR, CHR - CHARLEY RIVER, CIR - CIRCLE, COL - COLEEN, COR - CORDOVA, CRG - CRAIG, CRS - CHRISTIAN, DEL - DE LONG MTS, DIL - DILLINGHAM, DIX - DIXON ENTRANCE, EAG - EAGLE, FAI - FAIRBANKS, FYU - FORT YUKON, GDN - GOODNEWS BAY, GUL - GULKANA, HAR - HARRISON BAY, HEA - HEALY, HUG - HUGHES, IDT - IDITAROD, IKR - IKPIKPUK RIVER, ILI - ILIAMNA, JUN - JUNEAU, KAG - KAGUYAK, KAR - KARLUK, KAT - KATEEL RIVER, KEN - KENAI, KET - KETCHIKAN, KIR - KILLIK RIVER, KIS - KISKA, KOD - KODIAK, KTZ - KOTZEBUE, KWI - KWIGUK, LIM - LIME HILLS, LIV - LIVENGOOD, MAR - MARSHALL, MCG - MC GRATH, MED - MEDFRA, MIS - MISHEGUK MTN, MLZ - MELOZITNA, MMK - MT MC KINLEY, MSE - MT ST ELIAS, NAB - NABESNA, NAK - NAKNEK, NOA - NOATAK, NOB - NORTON BAY, NOM - NOME, NUL - NULATO, OPH - OPHIR, PET - PETERSBURG, PSM - PHILIP SMITH MTS, RAT - RAT ISLAND, RUB - RUBY, RUS - RUSSIAN MISSION, SAG - SAGAVANIRKTOK, SAM - SAMALGA ISLAND, SEG - SEGUAM, SEL - SELDOVIA, SEW - SEWARD, SHF - SHISHMAREF, SHU - SHUNGNAK, SIT - SITKA, SKG - SKAGWAY, SLK - SELAWIK, SLT - SLEETMUTE, SMI - ST MICHAEL, SOL - SOLOMON, SUM - SUMDUM, SUT - SUTWIK ISLAND, TAB - TABLE MTN, TAL - TALKEETNA, TAN - TANANA, TAY - TAYLOR MTS, TEL - TELLER, TES - TESHEKPUK, TLM - TALKEETNA MTS, TNX - TANACROSS, TYO - TYONEK, UGA - UGASHIK, UKT - UNALAKLEET, UMI - UMIAT, UMK - UMNAK, UNI - UNIMAK, UNL - UNALASKA, VAL - VALDEZ, WAI - WAINWRIGHT, WIS - WISEMAN, XBB - BRISTOL BAY, XBC - BRADFIELD CANAL, XBD - BIG DELTA, XBG - BERING GLACIER, XBI - BAIRD INLET, XBM - BAIRD MTS, XBP - BEECHEY POINT, XBS - BLYING SOUND, XCL - CHANDLER LAKE, XCM - CAPE MENDENHALL, XDP - DEMARCATION POINT, XFI - FLAXMAN ISLAND, XFP - FALSE PASS, XFR - COLD BAY, XGI - GARELOI ISLAND, XHB - HOOPER BAY, XHC - HOLY CROSS, XHI - HAGEMEISTER ISLAND, XHP - HOWARD PASS, XIB - ICY BAY, XKB - KUSKOKWIM BAY, XKR - KANTISHNA RIVER, XLC - LAKE CLARK, XLR - LOOKOUT RIDGE, XMC - MC CARTHY, XMF - MT FAIRWEATHER, XMH - MT HAYES, XMI - MIDDLETON ISLAND, XMK - MT KATMAI, XMM - MT MICHELSON, XMR - MEADE RIVER, XNB - NUSHAGAK BAY, XNI - NUNIVAK ISLAND, XPA - PORT ALEXANDER, XPH - POINT HOPE, XPI - PRIBILOF ISLANDS, XPL - POINT LAY, XPM - PORT MOLLER, XPR - PRINCE RUPERT, XSB - STEPOVAK BAY, XSI - SIMEONOF ISLAND, XSL - ST LAWRENCE, XSM - ST MATTHEW, XSP - SURVEY PASS, XTI - TRINITY ISLANDS, XTR - TAKU RIVER, XUR - UTUKOK RIVER, YAK - YAKUTAT,1:250K quadrangle tile_name and quadrangle name

    shape
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    name
    full name of 1:250K quadrangle (Source: unknown)

    ValueDefinition
    ADAK, AFOGNAK, AMBLER RIVER, AMUKTA, ANCHORAGE, ARCTIC, ATKA, ATLIN, ATTU, BAIRD INLET, BAIRD MTS, BARROW, BARTER ISLAND, BEAVER, BEECHEY POINT, BENDELEBEN, BERING GLACIER, BETHEL, BETTLES, BIG DELTA, BLACK, BLACK RIVER, BLYING SOUND, BRADFIELD CANAL, BRISTOL BAY, CANDLE, CAPE MENDENHALL, CHANDALAR, CHANDLER LAKE, CHARLEY RIVER, CHIGNIK, CHRISTIAN, CIRCLE, COLD BAY, COLEEN, CORDOVA, CRAIG, DE LONG MTS, DEMARCATION POINT, DILLINGHAM, DIXON ENTRANCE, EAGLE, FAIRBANKS, FALSE PASS, FLAXMAN ISLAND, FORT YUKON, GARELOI ISLAND, GOODNEWS BAY, GULKANA, HAGEMEISTER ISLAND, HARRISON BAY, HEALY, HOLY CROSS, HOOPER BAY, HOWARD PASS, HUGHES, ICY BAY, IDITAROD, IKPIKPUK RIVER, ILIAMNA, JUNEAU, KAGUYAK, KANTISHNA RIVER, KARLUK, KATEEL RIVER, KENAI, KETCHIKAN, KILLIK RIVER, KISKA, KODIAK, KOTZEBUE, KUSKOKWIM BAY, KWIGUK, LAKE CLARK, LIME HILLS, LIVENGOOD, LOOKOUT RIDGE, MARSHALL, MC CARTHY, MC GRATH, MEADE RIVER, MEDFRA, MELOZITNA, MIDDLETON ISLAND, MISHEGUK MTN, MT FAIRWEATHER, MT HAYES, MT KATMAI, MT MC KINLEY, MT MICHELSON, MT ST ELIAS, NABESNA, NAKNEK, NOATAK, NOME, NORTON BAY, NULATO, NUNIVAK ISLAND, NUSHAGAK BAY, OPHIR, PETERSBURG, PHILIP SMITH MTS, POINT HOPE, POINT LAY, PORT ALEXANDER, PORT MOLLER, PRIBILOF ISLANDS, PRINCE RUPERT, RAT ISLAND, RUBY, RUSSIAN MISSION, SAGAVANIRKTOK, SAMALGA ISLAND, SEGUAM, SELAWIK, SELDOVIA, SEWARD, SHISHMAREF, SHUNGNAK, SIMEONOF ISLAND, SITKA, SKAGWAY, SLEETMUTE, SOLOMON, ST LAWRENCE, ST MATTHEW, ST MICHAEL, STEPOVAK BAY, SUMDUM, SURVEY PASS, SUTWIK ISLAND, TABLE MTN, TAKU RIVER, TALKEETNA, TALKEETNA MTS, TANACROSS, TANANA, TAYLOR MTS, TELLER, TESHEKPUK, TRINITY ISLANDS, TYONEK, UGASHIK, UMIAT, UMNAK, UNALAKLEET, UNALASKA, UNIMAK, UTUKOK RIVER, VALDEZ, WAINWRIGHT, WISEMAN, YAKUTAT,Full name of 1:250K quadrangle

    quadno
    Abbreviated code representing 1:250,000 quads (Source: unknown)

    ValueDefinition
    ADAK - 151, AFOGNAK - 115, AMBLER RIVER - 28, AMUKTA - 146, ANCHORAGE - 85, ARCTIC - 24, ATKA - 152, ATLIN - 110, ATTU - 145, BAIRD INLET - 90, BAIRD MTS - 27, BARROW - 1, BARTER ISLAND - 8, BEAVER - 40, BEECHEY POINT - 6, BENDELEBEN - 44, BERING GLACIER - 97, BETHEL - 91, BETTLES - 39, BIG DELTA - 59, BLACK - 70, BLACK RIVER - 42, BLYING SOUND - 105, BRADFIELD CANAL - 132, BRISTOL BAY - 119, CANDLE - 45, CAPE MENDENHALL - 99, CHANDALAR - 31, CHANDLER LAKE - 22, CHARLEY RIVER - 51, CHIGNIK - 126, CHRISTIAN - 32, CIRCLE - 50, COLD BAY - 133, COLEEN - 33, CORDOVA - 96, CRAIG - 136, DE LONG MTS - 18, DEMARCATION POINT - 16, DILLINGHAM - 102, DIXON ENTRANCE - 141, EAGLE - 60, FAIRBANKS - 58, FALSE PASS - 139, FLAXMAN ISLAND - 7, FORT YUKON - 41, GARELOI ISLAND - 150, GOODNEWS BAY - 101, GULKANA - 77, HAGEMEISTER ISLAND - 111, HARRISON BAY - 5, HEALY - 67, HOLY CROSS - 72, HOOPER BAY - 79, HOWARD PASS - 20, HUGHES - 38, ICY BAY - 107, IDITAROD - 73, IKPIKPUK RIVER - 12, ILIAMNA - 103, JUNEAU - 117, KAGUYAK - 129, KANTISHNA RIVER - 57, KARLUK - 121, KATEEL RIVER - 46, KENAI - 94, KETCHIKAN - 137, KILLIK RIVER - 21, KISKA - 148, KODIAK - 122, KOTZEBUE - 35, KUSKOKWIM BAY - 100, KWIGUK - 71, LAKE CLARK - 93, LIME HILLS - 83, LIVENGOOD - 49, LOOKOUT RIDGE - 11, MARSHALL - 80, MC CARTHY - 87, MC GRATH - 74, MEADE RIVER - 3, MEDFRA - 65, MELOZITNA - 47, MIDDLETON ISLAND - 106, MISHEGUK MTN - 19, MT FAIRWEATHER - 116, MT HAYES - 68, MT KATMAI - 114, MT MC KINLEY - 66, MT MICHELSON - 15, MT ST ELIAS - 98, NABESNA - 78, NAKNEK - 113, NOATAK - 26, NOME - 52, NORTON BAY - 54, NULATO - 55, NUNIVAK ISLAND - 89, NUSHAGAK BAY - 112, OPHIR - 64, PETERSBURG - 131, PHILIP SMITH MTS - 23, POINT HOPE - 17, POINT LAY - 9, PORT ALEXANDER - 130, PORT MOLLER - 134, PRIBILOF ISLANDS - 125, PRINCE RUPERT - 142, RAT ISLAND - 149, RUBY - 56, RUSSIAN MISSION - 81, SAGAVANIRKTOK - 14, SAMALGA ISLAND - 147, SEGUAM - 153, SELAWIK - 36, SELDOVIA - 104, SEWARD - 95, SHISHMAREF - 34, SHUNGNAK - 37, SIMEONOF ISLAND - 140, SITKA - 123, SKAGWAY - 109, SLEETMUTE - 82, SOLOMON - 53, ST LAWRENCE - 61, ST MATTHEW - 88, ST MICHAEL - 62, STEPOVAK BAY - 135, SUMDUM - 124, SURVEY PASS - 29, SUTWIK ISLAND - 127, TABLE MTN - 25, TAKU RIVER - 118, TALKEETNA - 75, TALKEETNA MTS - 76, TANACROSS - 69, TANANA - 48, TAYLOR MTS - 92, TELLER - 43, TESHEKPUK - 4, TRINITY ISLANDS - 128, TYONEK - 84, UGASHIK - 120, UMIAT - 13, UMNAK - 143, UNALAKLEET - 63, UNALASKA - 144, UNIMAK - 138, UTUKOK RIVER - 10, VALDEZ - 86, WAINWRIGHT - 2, WISEMAN - 30, YAKUTAT - 108,1:250K quadrangle name and number

    Entity_and_Attribute_Overview:
    NAME SHORTNAME QUADNO BARROW BAR 1 BARTER ISLAND BRL 8 FLAXMAN ISLAND XFI 7 WAINWRIGHT WAI 2 BEECHEY POINT XBP 6 MEADE RIVER XMR 3 HARRISON BAY HAR 5 TESHEKPUK TES 4 DEMARCATION POINT XDP 16 POINT LAY XPL 9 MT MICHELSON XMM 15 UTUKOK RIVER XUR 10 SAGAVANIRKTOK SAG 14 LOOKOUT RIDGE XLR 11 UMIAT UMI 13 IKPIKPUK RIVER IKR 12 POINT HOPE XPH 17 TABLE MTN TAB 25 DE LONG MTS DEL 18 ARCTIC ARC 24 MISHEGUK MTN MIS 19 PHILIP SMITH MTS PSM 23 HOWARD PASS XHP 20 CHANDLER LAKE XCL 22 KILLIK RIVER KIR 21 COLEEN COL 33 NOATAK NOA 26 CHRISTIAN CRS 32 BAIRD MTS XBM 27 CHANDALAR CHN 31 AMBLER RIVER AMR 28 WISEMAN WIS 30 SURVEY PASS XSP 29 SHISHMAREF SHF 34 BLACK RIVER BLR 42 KOTZEBUE KTZ 35 FORT YUKON FYU 41 SELAWIK SLK 36 BEAVER BVR 40 SHUNGNAK SHU 37 BETTLES BET 39 HUGHES HUG 38 TELLER TEL 43 CHARLEY RIVER CHR 51 BENDELEBEN BEN 44 CIRCLE CIR 50 CANDLE CAN 45 LIVENGOOD LIV 49 KATEEL RIVER KAT 46 TANANA TAN 48 MELOZITNA MLZ 47 NOME NOM 52 EAGLE EAG 60 SOLOMON SOL 53 BIG DELTA XBD 59 NORTON BAY NOB 54 FAIRBANKS FAI 58 NULATO NUL 55 KANTISHNA RIVER XKR 57 RUBY RUB 56 ST LAWRENCE XSL 61 TANACROSS TNX 69 ST MICHAEL SMI 62 MT HAYES XMH 68 UNALAKLEET UKT 63 HEALY HEA 67 OPHIR OPH 64 MT MC KINLEY MMK 66 MEDFRA MED 65 BLACK BLK 70 NABESNA NAB 78 KWIGUK KWI 71 GULKANA GUL 77 HOLY CROSS XHC 72 TALKEETNA MTS TLM 76 IDITAROD IDT 73 TALKEETNA TAL 75 MC GRATH MCG 74 HOOPER BAY XHB 79 MC CARTHY XMC 87 ST MATTHEW XSM 88 MARSHALL MAR 80 VALDEZ VAL 86 RUSSIAN MISSION RUS 81 ANCHORAGE ANC 85 SLEETMUTE SLT 82 TYONEK TYO 84 LIME HILLS LIM 83 MT ST ELIAS MSE 98 ATLIN ATL 110 NUNIVAK ISLAND XNI 89 BERING GLACIER XBG 97 BAIRD INLET XBI 90 CORDOVA COR 96 SKAGWAY SKG 109 BETHEL BTH 91 TAYLOR MTS TAY 92 YAKUTAT YAK 108 TAKU RIVER XTR 118 CAPE MENDENHALL XCM 99 ICY BAY XIB 107 JUNEAU JUN 117 KUSKOKWIM BAY XKB 100 MIDDLETON ISLAND XMI 106 MT FAIRWEATHER XMF 116 DILLINGHAM DIL 102 SUMDUM SUM 124 SITKA SIT 123 HAGEMEISTER ISLAND XHI 111 NUSHAGAK BAY XNB 112 NAKNEK NAK 113 MT KATMAI XMK 114 PETERSBURG PET 131 PORT ALEXANDER XPA 130 PRIBILOF ISLANDS XPI 125 ATTU ATU 145 BRISTOL BAY XBB 119 UGASHIK UGA 120 CRAIG CRG 136 DIXON ENTRANCE DIX 141 COLD BAY XFR 133 KISKA KIS 148 PORT MOLLER XPM 134 RAT ISLAND RAT 149 UNIMAK UNI 138 FALSE PASS XFP 139 GARELOI ISLAND XGI 150 SIMEONOF ISLAND XSI 140 UMNAK UMK 143 UNALASKA UNL 144 ADAK ADK 151 ATKA ATK 152 AMUKTA AMK 146 SEGUAM SEG 153 SAMALGA ISLAND SAM 147 SEWARD SEW 95 BLYING SOUND XBS 105 CHIGNIK CHK 126 STEPOVAK BAY XSB 135 SUTWIK ISLAND SUT 127 BRADFIELD CANAL XBC 132 PRINCE RUPERT XPR 142 KETCHIKAN KET 137 KARLUK KAR 121 KODIAK KOD 122 TRINITY ISLANDS XTI 128 KAGUYAK KAG 129 KENAI KEN 94 LAKE CLARK XLC 93 SELDOVIA SEL 104 ILIAMNA ILI 103 AFOGNAK AFG 115 GOODNEWS BAY GDN 101
    Entity_and_Attribute_Detail_Citation: none

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?

    BLM for their AEH files contribution.

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

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

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

    Hours_of_Service: 800-1600 AST
    Contact_Instructions: See Distribution_Information

Why was the data set created?

Identifying the corners of the 1:250,000 Quadrangle Boundaries.

How was the data set created?

  1. From what previous works were the data drawn?

    none (source 1 of 2)
    Bureau of Land Management, 1992, AEH files.

    Type_of_Source_Media: magnetic tape
    Source_Scale_Denominator: 2
    Source_Contribution: base for generating quadrangles

    none (source 2 of 2)
    Alaska Dept. of Natural Resourc, Land Records Info. Section, 1993, USGS Quadrangle Boundaries for inch to the mile topographic maps.

    Online Links:

    Type_of_Source_Media: zip file
    Source_Contribution: generated quadrangle shapes in Alaska Albers NAD27

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

    Date: 1993 (process 1 of 2)
    converted ascii file to tic coverage to create itm coverage. Dissolved quads from itm coverage.

    Date: 01-Jan-2008 (process 2 of 2)
    Transformed from Alaska Albers NAD27 to NAD83 Alaska Albers using NADCON for Alaska transformation methodology.

    Person who carried out this activity:

    Tim Varner
    Bureau of Land Managment
    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?

    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?

    All 153 1:250000 quads were plotted- showing tics- tic ids and quad boundaries. Checked for missing tics from quad corners- and verified against USGS maps questionable tics and quad boundaries.
    Some tics were found to be incorrect including missing tics and extraneous tics. These were corrected by projecting the lat/longs from the USGS maps into Albers and adding them to the cover.
    Each tic id contains the longitude/latitude for its location in degrees & minutes. For example tic id 157405615 has a longitude of 157 degrees and 40 minutes and a latitude of 56 degrees and 15 minutes. Seconds are not included in tic id but the complete longitude/latitude including seconds was used to position the tics. Negative tic ids were used for the quads of ATTU KISKA and RAT ISLANDS because these islands are located west of 180 degrees longitude.
    This coverage includes an outside polygon for the purpose of setting up the library in order to include some areas which fall outside the USGS qmq boundaries. This is in case we ever need to add new tiles to map anything off the coast which would not be covered by USGS quads.

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

    Polygon 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:
Appropriate scale of use in not applicable. Arcs were generated from exact latitude/longitude.
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.

  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: 10-Jan-2008
Last Reviewed: 10-Jan-2008
To be reviewed: 10-Jan-2009
Metadata author:
Bureau of Land Managment
c/o Tim Varner
IT Specialist
222 W. 7th Ave. #13
Anchorage, AK 99513
USA

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

Hours_of_Service: 800-1600 AST
Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
Metadata extensions used:

Metadata Information
BLM Alaska Metadata Repository

Generated by mp version 2.9.2 on Tue Feb 19 14:50:01 2008