USGS Home
USGS Home USGS Home
Contact USGS
Search USGS
 Alaska Geospatial Data Committee
spacer
spacer

Bristol Bay Mapping Project

Metadata:

Identification_Information:

Citation:

Citation_Information:

Originator: U.S.G.S. EROS Alaska Field Ofice

Publication_Date: 19990526

Title: Bristol Bay Mapping Project

Edition: 1

Geospatial_Data_Presentation_Form: remote-sensing image

Publication_Information:

Publication_Place: Anchorage AK

Publisher: Alaska Department of Natural Resources

Online_Linkage: <https://agdc.usgs.gov>

Description:

Abstract: See Purpose

Purpose:

EROS ALASKA FIELD OFFICE - ALASKAN LAND COVER DATA BASE

Since the early 1980s, the EROS Alaska Field Office (AFO) has been involved in the acquisition, classification, and analysis of vegetative land cover data over the State of Alaska, and to a limited extent, northwestern Canada and Wrangle Island, Russia. Recently, an attempt has been made to acquire the historical land cover data produced by the various State and Federal agencies in Alaska and make them available to land managers and researchers who may be interested in land cover conditions over various portions of Alaska. The data currently available consists of final land cover maps as a result of spectral classification of Landsat multispectral scanner, Landsat thematic mapper, or SPOT multispectral scanner satellite data. The data within this database currently covers approximately 70% of the land and water within the boundaries of the State of Alaska. It should be noted that data over some areas of the State are missing from the database due to data degradation on storage tape media or loss of data tapes, although a limited number of hard-copy map products may be in existence (e.g., southeast Alaska).

Database Description

The land cover data are currently in a series of directories and associated files which are available via ftp. Each directory name is indicative of the area for which the land cover data exists. Some directories indicate a U.S. Geological Survey 1:250,000 quadrangle (e.g., anchorage_int), while others indicate a particular project area (e.g., anwr for Arctic National Wildlife Refuge). Also associated with some of the names is an indicator of the agency responsible for producing the data (e.g., nowitna.fws or U.S. Fish and Wildlife Service). Directories with an '_int' suffix indicate that the data correspond to Interim Land cover Mapping project as described by Shasby and Carneggie 1986 or Fitzpatrick-Lins and others 1989.

Each directory contains five files with the following extensions: .bil, .blw, .hdr, .prj, and .stx. As a group, the files are easily read by ARC/INFO GRID, with the resulting grid containing all of the georeference information. The .bil file contains the binary raster land cover data and can be read into almost any of the common image processing software packages. The .blw file gives pixel size information as well as the upper left corner coordinate. The .hdr contains number of rows and columns of the data set, as well as band format (band sequential or interleave). The .prj file gives projection information, and the .stx file gives information on minimum/maximum/ mean values of the data.

A directory labeled lcc_clsvalues contains a series of text files giving class names for each of the land cover class values in each of the data sets. The readme.1st file contains a lookup table showing which text file pertains to which land cover dataset, based on directory name.

Fitzpatrick-Lins, K., Doughty, E.F., Shasby, M., and Benjamin, S., 1989. Alaska Interim Land Cover Mapping Program - Final Report, U.S. Geological Survey Open-File Report 89-128, Reston, Virginia.

Shasby, M., and Carneggie, D., 1986. Vegetation and terrain mapping in Alaska using Landsat MSS and digital terrain data, Photogrammetric Engineering and Remote Sensing 52:779-786.

Supplemental_Information:

Bristol Bay Landcover Legend

Projection Coordinates in UTM Zone 4, Clarke 1866, NAD27

Rows: 979

Columns: 884

CORNER COOR: Y X                                                                        Valid:VALID

ULcorner:6.36450000000000E+06 5.17800000000000E+05

URcorner:6.36450000000000E+06 5.61950000000000E+05

 LLcorner:6.31560000000000E+06 5.17800000000000E+05

LRcorner:6.31560000000000E+06 5.61950000000000E+05

PROJ.DIST:5.00000000000000E+01 5.00000000000000E+01         Valid:VALID

PROJ. UNITS:meters                                                               Valid:VALID

 INCREMENT:1.00000000000000E+00 1.00000000000000E+00 Valid:VALID

Class Class Name

 ----- -----------

1 Deep clear water

2 Shallow/sedimented water

3 Snow/cloud/light barren

4 Barren

5 Mountain shadow

6 Marsh/very wet bog

7 Wet bog/wet meadow

8 Conifer forest

9 Mixed forest

10 Miscellaneous deciduous (open alder, cottonwood, birch, willow)

11 Closed shrub - graminoid

12 Open low shrub ericaceous/conifer woodland/mesic bog/ericacous shrub tundra

13 Open low shrub graminoid/mesic bog/graminoid shrub tundra

14 Lichen shrub tundra

15 Lichen

28 Deep clear water - offshore

29 Shallow/sedimented water - offshore

Wibbenmeyer, M., Grunblatt, J. and Shea, L., 1982. User's guide for Bristol Bay Land Cover Maps. Alaska Department of Natural Resources, Anchorage, Alaska.

***** Spatial Reference Information (Beg) *****

Projection Parameters

Spatial Information Raster: Number of Columns: 3650 Number of Rows: 2700 Pixel Resolution (m): 50 Data Type: byte

***** Spatial Reference Information (End) *****

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 19800505

Ending_Date: 19820601

Currentness_Reference: publication date

Status:

Progress: Complete

Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: 0

East_Bounding_Coordinate: 0

North_Bounding_Coordinate: 0

South_Bounding_Coordinate: 0

Keywords:

Theme:

Theme_Keyword_Thesaurus: EARTH SCIENCE > LAND SURFACE> Land Use/Land Cover

Theme_Keyword: Land Use/Land Cover

Place:

Place_Keyword_Thesaurus: U.S.A. > Alaska > Bristol Bay

Place_Keyword: Bristol Bay

Place_Keyword: Cape Mendenhall

Temporal:

Temporal_Keyword_Thesaurus: 1980 - 1999

Temporal_Keyword: 1982

Access_Constraints: None Known

Use_Constraints:

Full acknowledgement given to data owner/producer, or the Alaska Department of Natural Resources and the EROS Alaska Field Office

Browse_Graphic:

Browse_Graphic_File_Name: None

Browse_Graphic_File_Description: None

Browse_Graphic_File_Type: None

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Raster

Distribution_Information:

Distributor:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Carl Markon

Contact_Organization: USGS/EROS Alaska Field Office

Contact_Address:

Address_Type: Mailing and Physical Address

Address:

4230 University Drive Suite 230

City: Anchorage

State_or_Province: Alaska

Postal_Code: 99507-4664

Country: USA

Contact_Voice_Telephone: 907-786-7023

Contact_Facsimile_Telephone: 907-786-7036

Contact_Electronic_Mail_Address: markon@usgs.gov

Resource_Description: Statewide land cover data base

Distribution_Liability:

Some U.S. Geological Survey (USGS) information accessed through this page may be preliminary in nature and presented without the approval of the Director of the USGS. The information and data provided is with the understanding that it is not guaranteed to be correct or complete and conclusions drawn from such information are the responsibility of the user.

Metadata_Reference_Information:

Metadata_Date: 19990526

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Carl Markon

Contact_Organization: USGS/EROS Alaska Field Office

Contact_Address:

Address_Type: Mailing and Physical Address

Address:

4230 University Drive Suite 230

City: Anchorage

State_or_Province: Alaska

Postal_Code: 99507-4664

Country: USA

Contact_Voice_Telephone: 907-786-7023

Contact_Facsimile_Telephone: 907-786-7036

Contact_Electronic_Mail_Address: markon@usgs.gov

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998


AGDC Home | Information | Datasets | Tools | Links | Contacts

Accessibility FOIA Privacy Policies and Notices

USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
URL: https://agdc.usgs.gov/data/usgs/erosafo/ak_lcc/metadata/bristolbay2.htm
Page Contact Information: agdcweb@usgs.gov
Page Last Modified: Wednesday, 07-Dec-2016 12:20:09 AKST