This file contains meta-data for Arc GIS image files: <1973topogrid_airphoto.rrd> <1973topogrid_airphoto.img> Contains 1973 air photo coverage of former site 4 IBP topographic grid Barrow, Alaska. GENERAL INFORMATION PI/DATA CONTACT= Webber, Patrick J (MSU)/ Tweedie, Craig E FUNDING SOURCE AWARD # = NSF OPP 9906692 DATA COVERAGE = START: 19730601; STOP: 20010831 UTC PLATFORM/SITE = Barrow, Alaska (71o19'N 156o37'W); INSTRUMENT = None. DATA VERSION = 1.0 (8 February 2002), PRELIMINARY [likely to contain errors] CONTACT INFORMATION Craig E. Tweedie 100 North Kedzie Hall Michigan State University East Lansing, MI 48824-1031 Voice: 517 355-1285 Fax: 517 432-2150 Email: tweedie@msu.edu DATA COLLECTION The photograph was taken in 1971 by the US Army CRELL prior to the topographic grid being established. An acetate image of the photograph was scanned and the digital image georectified in ArcView GIS V3.2 using the Image Analyst extension. Craig Tweedie and Greg Pederson performed all GIS processing of the image. NOTE Image is unprojected, distances are in meters. This file contains meta-data for Arc GIS image files: <2001topogrid_airphoto.rrd> <2001topogrid_airphoto.img> Contains 2001 air photo coverage of former site 4 IBP topographic grid Barrow, Alaska. GENERAL INFORMATION PI/DATA CONTACT= Webber, Patrick J (MSU)/ Tweedie, Craig E FUNDING SOURCE AWARD # = NSF OPP 9906692 DATA COVERAGE = START: 19730601; STOP: 20010831 UTC PLATFORM/SITE = Barrow, Alaska (71o19'N 156o37'W); INSTRUMENT = None. DATA VERSION = 1.0 (8 February 2002), PRELIMINARY [likely to contain errors] CONTACT INFORMATION Craig E. Tweedie 100 North Kedzie Hall Michigan State University East Lansing, MI 48824-1031 Voice: 517 355-1285 Fax: 517 432-2150 Email: tweedie@msu.edu DATA COLLECTION The overall grid measures 390m by 110m. The grid is marked by a wooden peg at every 10m grid point. For photography, paper plates were placed over each peg to facilitate georectification of the photos. Craig Tweedie, took photos using a 24mm lens on an SLR camera through the floor of a helicopter flying at approximately 500 feet. Printed photographs were scanned and the digital image georectified in ArcView GIS V3.2 using the Image Analyst extension. NOTE Image is unprojected, distances are in meters. This file contains meta-data for file: <1973-01 Webber IBP Topographic Grid Batty Webber Veg Classification.txt>. Contains Batty and Webber vegetation classification codes used to describe Webber's IBP topographic grid in 1973 and 2001 at Barrow, Alaska. GENERAL INFORMATION PI/DATA CONTACT= Webber, Patrick J (MSU)/ Tweedie, Craig E FUNDING SOURCE AWARD # = NSF OPP 9906692 DATA COVERAGE = START: 19730601; STOP: 20010831 UTC PLATFORM/SITE = Barrow, Alaska (71o19'N 156o37'W); INSTRUMENT = None. DATA VERSION = 1.0 (8 February 2002), PRELIMINARY [likely to contain errors] CONTACT INFORMATION Craig E. Tweedie 100 North Kedzie Hall Michigan State University East Lansing, MI 48824-1031 Voice: 517 355-1285 Fax: 517 432-2150 Email: tweedie@msu.edu META-DATA FORMAT The following prefixes have been used to designate data type for each field. str - indicates string (text) data dtm - indicates date time data num - indicates numeric data mem - indicates memo data FIELD DESCRIPTIONS numVegBatWeb -Batty and Webber vegetation type code recorded at each grid point strVegBatWeb -Batty and Webber vegetation type description memComments -General Comments NOTE Codes correspond to those under the same field heading in <1973-01 Webber IBP Topographic Grid Grid Point Data.txt>. This file contains meta-data for file: <1973-01 Webber IBP Topographic Grid Grid Point Data.txt>. Contains data collected on land cover, plot condition, microtopographic position, relative elevation and active layer from Webber's IBP plots in 1973 and 2001 at Barrow, Alaska. GENERAL INFORMATION PI/DATA CONTACT= Webber, Patrick J (MSU)/ Tweedie, Craig E FUNDING SOURCE AWARD # = NSF OPP 9906692 DATA COVERAGE = START: 19730601; STOP: 20010831 UTC PLATFORM/SITE = Barrow, Alaska (71o19'N 156o37'W); INSTRUMENT = None. DATA VERSION = 1.0 (8 February 2002), PRELIMINARY [likely to contain errors] CONTACT INFORMATION Craig E. Tweedie 100 North Kedzie Hall Michigan State University East Lansing, MI 48824-1031 Voice: 517 355-1285 Fax: 517 432-2150 Email: tweedie@msu.edu DATA COLLECTION Data was collected at grid points marked by wooden stakes at former IBP site 4. The overall grid measures 390m by 110m. The grid is marked at every 10m grid point. META-DATA FORMAT The following prefixes have been used to designate data type for each field. str - indicates string (text) data dtm - indicates date time data num - indicates numeric data mem - indicates memo data FIELD DESCRIPTIONS strXyCoord -Peg number given as the x coordinate peg number and y coordinate peg number numXCoord -Distance of peg from point of origin along x axis (meters) numYCoord -Distance of peg from point of origin along y axis (meters) strPegCond -Peg Condition recorded at the grid point in 1973 numElevation73 -Relative elevation recorded at the grid point in 1973 (meters) numElevation01 -Relative elevation recorded at the grid point in 2001 (meters) numPosition73 -Microtopographic position category recorded at the grid point in 1973 numPosition01 -Microtopographic position category recorded at the grid point in 2001 numVegBatWeb73 -Batty and Webber vegetation type recorded at the grid point in 1973 numVegBatWeb01 -Batty and Webber vegetation type recorded at the grid point in 2001 numVegWalkerWeb73 -Walker and Webber vegetation type recorded at the grid point in 1973 numVegWalkerWeb01 -Walker and Webber vegetation type recorded at the grid point in 2001 numSoilType73 -Soil Type recorded at the grid point in 1973 numSoilType01 -Soil Type recorded at the grid point in 2001 numActLay73_07_03 -Active layer depth 3rd July 1972 (meters) numActLay73_07_13 -Active layer depth 13th July 1972 (meters) numActLay73_07_23 -Active layer depth 23rd July 1972 (meters) numActLay73_08_02 -Active layer depth 2nd Aug 1972 (meters) numActLay73_08_12 -Active layer depth 12th Aug 1972 (meters) numActLay01_07_03 -Active layer depth 3rd July 2001 (meters) numActLay01_07_13 -Active layer depth 13th July 2001 (meters) numActLay01_07_23 -Active layer depth 23rd July 2001 (meters) numActLay01_08_02 -Active layer depth 2nd Aug 2001 (meters) numActLay01_08_12 -Active layer depth 12th Aug 2001 (meters) numActLay01_08_24 -Active layer depth 24th Aug 2001 (meters) memComments -General Comments NOTE Patrick Webber, John Batty and Skip Walker collected 1973 Data. Craig Tweedie, Paula Crouse, Alaina Herrmann, Dustin Bronson, Devan Berry and Andrea Kuchy collected 2001 data. Craig Tweedie performed data entry, quality checking and management. Peg Condition: see "1973-01 Webber IBP Topographic Grid Peg Condition Categories 2001.txt" for codes used to describe peg condition. Elevation was measured using a surveyor's theodolite. Microtopographic position: see "1973-01 Webber IBP Topographic Grid Microtopographic Position Categories.txt" for codes used to describe microtopographic position. Vegetation classifiction codes for Batty and Webber are given in "1973-01 Webber IBP Topographic Grid Batty Webber Veg Classification.txt" Vegetation classifiction codes for Walker and Webber are given in "1973-01 Webber IBP Topographic Grid Walker Webber Veg Classification.txt" Soil type: see "1973-01 Webber IBP Topographic Grid Soil Type Categories.txt" for codes used to describe Soil Types. Active Layer was recorded as the mean active layer depth recorded on the North and South of each grid point. Note, active layer depths were not recorded at all grid points in 1973 This file contains meta-data for file: <1973-01 Webber IBP Topographic Grid Microtopographic Position Categories.txt>. Contains microtopographic categories used in descriptions of Webber's IBP topographic grid in 1973 and 2001 at Barrow, Alaska. GENERAL INFORMATION PI/DATA CONTACT= Webber, Patrick J (MSU)/ Tweedie, Craig E FUNDING SOURCE AWARD # = NSF OPP 9906692 DATA COVERAGE = START: 19730601; STOP: 20010831 UTC PLATFORM/SITE = Barrow, Alaska (71o19'N 156o37'W); INSTRUMENT = None. DATA VERSION = 1.0 (8 February 2002), PRELIMINARY [likely to contain errors] CONTACT INFORMATION Craig E. Tweedie 100 North Kedzie Hall Michigan State University East Lansing, MI 48824-1031 Voice: 517 355-1285 Fax: 517 432-2150 Email: tweedie@msu.edu META-DATA FORMAT The following prefixes have been used to designate data type for each field. str - indicates string (text) data dtm - indicates date time data num - indicates numeric data mem - indicates memo data FIELD DESCRIPTIONS numPosition -Microtopographic position code recorded at each grid point strPosition -Microtopographic position position memComments -General Comments NOTE Codes correspond to those under the same field heading in <1973-01 Webber IBP Topographic Grid Grid Point Data.txt>. This file contains meta-data for file: <1973-01 Webber IBP Topographic Grid Peg Condition Categories.txt>. Contains categories of peg condition used to describe Webber's IBP topographic grid in 2001 at Barrow, Alaska. GENERAL INFORMATION PI/DATA CONTACT= Webber, Patrick J (MSU)/ Tweedie, Craig E FUNDING SOURCE AWARD # = NSF OPP 9906692 DATA COVERAGE = START: 19730601; STOP: 20010831 UTC PLATFORM/SITE = Barrow, Alaska (71o19'N 156o37'W); INSTRUMENT = None. DATA VERSION = 1.0 (8 February 2002), PRELIMINARY [likely to contain errors] CONTACT INFORMATION Craig E. Tweedie 100 North Kedzie Hall Michigan State University East Lansing, MI 48824-1031 Voice: 517 355-1285 Fax: 517 432-2150 Email: tweedie@msu.edu META-DATA FORMAT The following prefixes have been used to designate data type for each field. str - indicates string (text) data dtm - indicates date time data num - indicates numeric data mem - indicates memo data FIELD DESCRIPTIONS strPegCond -Peg Condition code recorded at each grid point strPegCondition -Peg Condition description memComments -General Comments NOTE Codes correspond to those under the same field heading in <1973-01 Webber IBP Topographic Grid Grid Point Data.txt>. This file contains meta-data for file: <1973-01 Webber IBP Topographic Grid Soil Type Categories.txt>. Contains soil type categories used in description of Webber's IBP topographic grid in 1973 and 2001 at Barrow, Alaska. GENERAL INFORMATION PI/DATA CONTACT= Webber, Patrick J (MSU)/ Tweedie, Craig E FUNDING SOURCE AWARD # = NSF OPP 9906692 DATA COVERAGE = START: 19730601; STOP: 20010831 UTC PLATFORM/SITE = Barrow, Alaska (71o19'N 156o37'W); INSTRUMENT = None. DATA VERSION = 1.0 (8 February 2002), PRELIMINARY [likely to contain errors] CONTACT INFORMATION Craig E. Tweedie 100 North Kedzie Hall Michigan State University East Lansing, MI 48824-1031 Voice: 517 355-1285 Fax: 517 432-2150 Email: tweedie@msu.edu META-DATA FORMAT The following prefixes have been used to designate data type for each field. str - indicates string (text) data dtm - indicates date time data num - indicates numeric data mem - indicates memo data FIELD DESCRIPTIONS numSoilType -Soil Type code recorded at each grid point strSoilType -Soil Type description memComments -General Comments NOTE Codes correspond to those under the same field heading in <1973-01 Webber IBP Topographic Grid Grid Point Data.txt>. This file contains meta-data for Arc GIS shape files: Contains 2001 vegetation map of former site 4 IBP topographic grid Barrow, Alaska. GENERAL INFORMATION PI/DATA CONTACT= Webber, Patrick J (MSU)/ Tweedie, Craig E FUNDING SOURCE AWARD # = NSF OPP 9906692 DATA COVERAGE = START: 19730601; STOP: 20010831 UTC PLATFORM/SITE = Barrow, Alaska (71o19'N 156o37'W); INSTRUMENT = None. DATA VERSION = 1.0 (8 February 2002), PRELIMINARY [likely to contain errors] CONTACT INFORMATION Craig E. Tweedie 100 North Kedzie Hall Michigan State University East Lansing, MI 48824-1031 Voice: 517 355-1285 Fax: 517 432-2150 Email: tweedie@msu.edu DATA COLLECTION The overall grid measures 390m by 110m. The grid is marked by a wooden peg at every 10m grid point. Craig Tweedie, Paula Crouse and Alaina Hermmann mapped vegetation in 2001. For each grid cell, tape measures were run along the y axis of the grid north-south and another tapemeasure was laid perpendicular to this along an east-west orientation. The latter tape measure wasmoved southward over the 10x10m grid cell and different vegetation in the grid cell was mapped on tofield data sheets. These were scanned and the digital image georectified in ArcView GIS V3.2 using the Image Analyst extension. The georectified image was then digitized and coded by hand. Image scanning, georectification and digitizing was performed by Craig Tweedie, Paula Crouse, Amy Wren, Leslie Ovitt and Dustin Bronson. FIELD DESCRIPTIONS in Area -Area (meters) of vegetation stand Perimeter -Perimeter (meters) of vegetation stand TopVeg01 -Batty and Webber vegetation classification code NOTE Descriptions of Batty and Webber vegetation classification codes are give in: <1973-01 Webber IBP Topographic Grid Batty Webber Veg Classification.txt>. Data is unprojected, distances are in meters. This file contains meta-data for Arc GIS shape files: Contains 1973 vegetation map of former site 4 IBP topographic grid Barrow, Alaska. GENERAL INFORMATION PI/DATA CONTACT= Webber, Patrick J (MSU)/ Tweedie, Craig E FUNDING SOURCE AWARD # = NSF OPP 9906692 DATA COVERAGE = START: 19730601; STOP: 20010831 UTC PLATFORM/SITE = Barrow, Alaska (71o19'N 156o37'W); INSTRUMENT = None. DATA VERSION = 1.0 (8 February 2002), PRELIMINARY [likely to contain errors] CONTACT INFORMATION Craig E. Tweedie 100 North Kedzie Hall Michigan State University East Lansing, MI 48824-1031 Voice: 517 355-1285 Fax: 517 432-2150 Email: tweedie@msu.edu DATA COLLECTION The overall grid measures 390m by 110m. The grid is marked by a wooden peg at every 10m grid point. Map was produced by Pat Webber and Skip Walker in 1973. An acetate of the map was scanned then georectified in ArcView 3.2 using Image Analyst extension. This map was then hand digitized. Image scanning, georectification and digitizing was performed by Craig Tweedie and Greg Pederson. FIELD DESCRIPTIONS in Area -Area (meters) of vegetation stand Perimeter -Perimeter (meters) of vegetation stand TopVeg01 -Batty and Webber vegetation classification code NOTE Descriptions of Batty and Webber vegetation classification codes are give in: <1973-01 Webber IBP Topographic Grid Batty Webber Veg Classification.txt>. Data is unprojected, distances are in meters. This file contains meta-data for file: <1973-01 Webber IBP Topographic Grid Walker Webber Veg Classification.txt>. Contains Walker and Webber vegetation classification codes to describe Webber's IBP topographic gris in 1973 and 2001 at Barrow, Alaska. GENERAL INFORMATION PI/DATA CONTACT= Webber, Patrick J (MSU)/ Tweedie, Craig E FUNDING SOURCE AWARD # = NSF OPP 9906692 DATA COVERAGE = START: 19730601; STOP: 20010831 UTC PLATFORM/SITE = Barrow, Alaska (71o19'N 156o37'W); INSTRUMENT = None. DATA VERSION = 1.0 (8 February 2002), PRELIMINARY [likely to contain errors] CONTACT INFORMATION Craig E. Tweedie 100 North Kedzie Hall Michigan State University East Lansing, MI 48824-1031 Voice: 517 355-1285 Fax: 517 432-2150 Email: tweedie@msu.edu META-DATA FORMAT The following prefixes have been used to designate data type for each field. str - indicates string (text) data dtm - indicates date time data num - indicates numeric data mem - indicates memo data FIELD DESCRIPTIONS numVegWalkWeb -Walker and Webber vegetation type code recorded at each grid point strVegWalkWeb -Walker and Webber vegetation type description memComments -General Comments NOTE Codes correspond to those under the same field heading in <1973-01 Webber IBP Topographic Grid Grid Point Data.txt>.