Huang, C., L. Yang, B. Wylie, and C. Homer, 2001. A strategy for estimating tree canopy density using Landsat 7 ETM+ and high resolution images over large areas. In: Third International Conference on Geospatial Information in Agriculture and Forestry; November 5-7, 2001; Denver, Colorado. CD-ROM, 1 disk. The USGS acknowledges the support of the RSAC (USFS Remote Sensing Applications Center) in development of data in this zone. The USGS also acknowledges the support of NRCS (National Resource Conservation Service), NRI (National Resource Inventory) for providing high resolution imagery for canopy classification.
The NLCD 2001 was created by partitioning the U.S. into mapping zones. A total of 66 mapping zones were delineated within the conterminous U.S. based on ecoregion and geographical characteristics, edge matching features and the size requirement of Landsat mosaics. Mapping zone 41 encompasses whole or portions of several states including the states of Minnesota, Wisconsin, and Michigan. Questions about the NLCD mapping zone 41 can be directed to the NLCD 2001 land cover mapping team at the USGS/EROS, Sioux Falls, SD (605) 594-6151 or mrlc@usgs.gov.
Acquisition dates of Landsat ETM+ (TM) scenes used for land cover classification in this zone are as follows:
SPRING-
Index 1 for Path 25/Row 26 on 05/04/01 = Scene_ID 7025026000112450
Index 2 for Path 25/Row 27 on 04/23/00 = Scene_ID 5025027000011410
Index 3 for Path 26/Row 27 on 04/28/99 = Scene_ID 5026027009911810
Index 4 for Path 26/Row 28 on 04/25/01 = Scene_ID 7026028000111550
Index 4 for Path 26/Row 29 on 04/25/01 = Scene_ID 7026029000111550
Index 5 for Path 27/Row 26 on 04/29/00 = Scene_ID 7027026000012050
Index 5 for Path 27/Row 27 on 04/29/00 = Scene_ID 7027027000012050
Index 5 for Path 27/Row 28 on 04/29/00 = Scene_ID 7027028000012050
Index 5 for Path 27/Row 29 on 04/29/00 = Scene_ID 7027029000012050
Index 6 for Path 28/Row 26 on 04/20/00 = Scene_ID 7028026000011150
Index 7 for Path 28/Row 27 on 03/03/00 = Scene_ID 7028027000006350
Index 7 for Path 28/Row 28 on 03/03/00 = Scene_ID 7028028000006350
Index 7 for Path 28/Row 29 on 03/03/00 = Scene_ID 7028029000006350
Index 8 for Path 29/Row 26 on 03/10/00 = Scene_ID 7029026000007050
Index 9 for Path 29/Row 27 on 03/02/00 = Scene_ID 5029027000006210
Index10 for Path 29/Row 28 on 05/08/01 = Scene_ID 5029028000112810
LEAF ON (Summer)-
Index 1 for Path 25/Row 26 on 07/04/00 = Scene_ID 7025026000018650
Index 1 for Path 25/Row 27 on 07/04/00 = Scene_ID 7025027000018650
Index 2 for Path 26/Row 27 on 07/03/00 = Scene_ID 5026027000018510
Index 3 for Path 26/Row 28 on 06/28/01 = Scene_ID 7026028000117950
Index 4 for Path 26/Row 29 on 06/09/00 = Scene_ID 7026029000016150
Index 5 for Path 27/Row 26 on 07/18/00 = Scene_ID 7027026000020050
Index 6 for Path 27/Row 27 on 07/05/01 = Scene_ID 7027027000118650
Index 7 for Path 27/Row 28 on 07/10/00 = Scene_ID 5027028000019210
Index 8 for Path 27/Row 29 on 07/24/99 = Scene_ID 5027029009920510
Index 9 for Path 28/Row 26 on 06/26/01 = Scene_ID 7028026000117750
Index10 for Path 28/Row 27 on 07/23/99 = Scene_ID 7028027009920450
Index10 for Path 28/Row 28 on 07/23/99 = Scene_ID 7028028009920450
Index11 for Path 28/Row 29 on 08/10/00 = Scene_ID 7028029000022350
Index12 for Path 29/Row 26 on 07/16/00 = Scene_ID 7029026000019850
Index13 for Path 29/Row 27 on 08/01/00 = Scene_ID 7029027000021450
Index13 for Path 29/Row 28 on 08/01/00 = Scene_ID 7029028000021450
LEAF-OFF (Fall)-
Index 1 for Path 25/Row 26 on 10/24/00 = Scene_ID 7025026000029850
Index 2 for Path 25/Row 27 on 10/11/01 = Scene_ID 7025027000128450
Index 3 for Path 26/Row 27 on 11/14/99 = Scene_ID 7026027009931850
Index 3 for Path 26/Row 28 on 11/14/99 = Scene_ID 7026028009931850
Index 3 for Path 26/Row 29 on 11/14/99 = Scene_ID 7026029009931850
Index 4 for Path 27/Row 26 on 10/22/00 = Scene_ID 7027026000029650
Index 5 for Path 27/Row 27 on 11/05/99 = Scene_ID 7027027009930950
Index 5 for Path 27/Row 28 on 11/05/99 = Scene_ID 7027028009930950
Index 6 for Path 27/Row 29 on 11/10/01 = Scene_ID 7027029000131450
Index 7 for Path 28/Row 26 on 11/17/01 = Scene_ID 7028026000132150
Index 8 for Path 28/Row 27 on 10/27/99 = Scene_ID 7028027009930050
Index 8 for Path 28/Row 28 on 10/27/99 = Scene_ID 7028028009930050
Index 8 for Path 28/Row 29 on 10/27/99 = Scene_ID 7028029009930050
Index 9 for Path 29/Row 26 on 10/20/00 = Scene_ID 7029026000029450
Index 9 for Path 29/Row 27 on 10/20/00 = Scene_ID 7029027000029450
Index 9 for Path 29/Row 28 on 10/20/00 = Scene_ID 7029028000029450
Landsat data and ancillary data used for the tree canopy -
Data Type of DEM composed of 1 band of Continuous Variable Type.
Data Type of Slope composed of 1 band of Continuous Variable Type.
Data Type of Aspect composed of 1 band of Categorical Variable Type.
Data type of Position Index composed of 1 band of Continuous Variable Type.