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 Earth Satellite Corporation in development of data in this zone.
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 21 encompasses whole or portions of several states including the states of Wyoming, Idaho,and Montana. Questions about the NLCD mapping zone 21 can be directed to the NLCD 2001 land cover mapping team at the National Center, 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 21 are as follows:
SPRING-
Index 1 for Path 37/Row 29 on 05/24/01 = Scene_ID 7037029000114450
Index 2 for Path 37/Row 29 on 06/01/01 = Scene_ID 5037029000115210
Index 2 for Path 37/Row 30 on 06/01/01 = Scene_ID 5037030000115210
Index 1 for Path 37/Row 30 on 05/24/01 = Scene_ID 7037030000114450
Index 3 for Path 38/Row 28 on 05/23/01 = Scene_ID 5038028000114310
Index 3 for Path 38/Row 29 on 05/23/01 = Scene_ID 5038029000114310
Index 3 for Path 38/Row 30 on 05/23/01 = Scene_ID 5038030000114310
Index 3 for Path 38/Row 31 on 05/23/01 = Scene_ID 5038031000114310
Index 4 for Path 39/Row 28 on 06/26/02 = Scene_ID 7039028000217750
Index 5 for Path 39/Row 29 on 06/04/00 = Scene_ID 7039029000015650
LEAF ON (Summer)-
Index 1 for Path 37/Row 29 on 07/30/02 = Scene_ID 7037029000221150
Index 2 for Path 37/Row 30 on 07/27/01 = Scene_ID 7037030000120850
Index 3 for Path 37/Row 30 on 07/09/03 = Scene_ID 5037030000319010
Index 4 for Path 38/Row 28 on 07/05/02 = Scene_ID 7038028000218650
Index 4 for Path 38/Row 29 on 07/05/02 = Scene_ID 7038029000218650
Index 5 for Path 38/Row 30 on 08/01/03 = Scene_ID 5038030000321310
Index 6 for Path 38/Row 31 on 06/29/00 = Scene_ID 7038031000018150
Index 7 for Path 39/Row 28 on 07/12/02 = Scene_ID 7039028000219350
Index 7 for Path 39/Row 29 on 07/12/02 = Scene_ID 7039029000219350
Index 8 for Path 39/Row 29 on 07/01/01 = Scene_ID 5039029000118210
Index 7 for Path 39/Row 30 on 07/12/01 = Scene_ID 7039030000119350
LEAF-OFF (Fall)-
Index 1 for Path 37/Row 29 on 09/08/99 = Scene_ID 7037029009925150
Index 1 for Path 37/Row 30 on 09/08/99 = Scene_ID 7037030009925150
Index 2 for Path 37/Row 31 on 09/10/00 = Scene_ID 7037031000025450
Index 3 for Path 38/Row 28 on 09/15/99 = Scene_ID 7038028009925850
Index 4 for Path 38/Row 28 on 09/02/03 = Scene_ID 5038028000324510
Index 3 for Path 38/Row 29 on 09/15/99 = Scene_ID 7038029009925850
Index 5 for Path 38/Row 29 on 09/20/01 = Scene_ID 7038029000126350
Index 3 for Path 38/Row 30 on 09/15/99 = Scene_ID 7038030009925850
Index 6 for Path 38/Row 31 on 10/03/00 = Scene_ID 7038031000027750
Index 7 for Path 39/Row 28 on 09/22/99 = Scene_ID 7039028009926550
Index 7 for Path 39/Row 29 on 09/22/99 = Scene_ID 7039029009926550
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.