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 Sanborn Solutions 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 23 encompasses whole or portions of several states including the states of Utah, Colorado, and Arizona. Questions about the NLCD mapping zone 23 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 34/Row 33 on 04/17/01 = Scene_ID 7034033000110750
Index 1 for Path 34/Row 34 on 04/17/01 = Scene_ID 7034034000110750
Index 2 for Path 35/Row 32 on 05/31/00 = Scene_ID 5035032000015210
Index 3 for Path 35/Row 33 on 05/23/00 = Scene_ID 7035033000014450
Index 2 for Path 35/Row 34 on 05/31/00 = Scene_ID 5035034000015210
Index 4 for Path 36/Row 32 on 04/12/00 = Scene_ID 7036032000010350
Index 4 for Path 36/Row 33 on 04/12/00 = Scene_ID 7036033000010350
Index 4 for Path 36/Row 34 on 04/12/00 = Scene_ID 7036034000010350
Index 5 for Path 37/Row 32 on 05/08/01 = Scene_ID 7037032000112850
Index 6 for Path 37/Row 33 on 05/05/00 = Scene_ID 7037033000012650
Index 7 for Path 37/Row 33 on 06/06/00 = Scene_ID 7037033000015850
Index 6 for Path 37/Row 34 on 05/05/00 = Scene_ID 7037034000012650
Index 7 for Path 37/Row 34 on 06/06/00 = Scene_ID 7037034000015850
Index 8 for Path 38/Row 34 on 05/12/00 = Scene_ID 7038034000013350
Index 9 for Path 38/Row 35 on 04/26/00 = Scene_ID 7038035000011750
LEAF ON (Summer)-
Index 1 for Path 34/Row 33 on 07/01/99 = Scene_ID 7034033009918250
Index 2 for Path 34/Row 33 on 06/23/02 = Scene_ID 7034033000217450
Index 3 for Path 34/Row 34 on 07/19/00 = Scene_ID 7034034000020150
Index 4 for Path 35/Row 32 on 09/12/00 = Scene_ID 7035032000025650
Index 4 for Path 35/Row 33 on 09/12/00 = Scene_ID 7035033000025650
Index 4 for Path 35/Row 34 on 09/12/00 = Scene_ID 7035034000025650
Index 5 for Path 36/Row 32 on 09/03/00 = Scene_ID 7036032000024750
Index 6 for Path 36/Row 32 on 07/07/02 = Scene_ID 7036032000218850
Index 7 for Path 36/Row 33 on 08/19/03 = Scene_ID 5036033000323110
Index 8 for Path 36/Row 34 on 06/15/00 = Scene_ID 7036034000016750
Index 9 for Path 37/Row 32 on 07/30/02 = Scene_ID 7037032000221150
Index 9 for Path 37/Row 33 on 07/30/02 = Scene_ID 7037033000221150
Index10 for Path 37/Row 34 on 06/06/00 = Scene_ID 7037034000015850
Index11 for Path 38/Row 34 on 06/13/00 = Scene_ID 7038034000016550
Index11 for Path 38/Row 35 on 06/13/00 = Scene_ID 7038035000016550
LEAF-OFF (Fall)-
Index 1 for Path 34/Row 33 on 11/06/99 = Scene_ID 7034033009931050
Index 1 for Path 34/Row 34 on 11/06/99 = Scene_ID 7034034009931050
Index 2 for Path 35/Row 32 on 11/13/99 = Scene_ID 7035032009931750
Index 3 for Path 35/Row 33 on 10/12/99 = Scene_ID 7035033009928550
Index 3 for Path 35/Row 34 on 10/12/99 = Scene_ID 7035034009928550
Index 4 for Path 36/Row 32 on 11/04/99 = Scene_ID 7036032009930850
Index 4 for Path 36/Row 33 on 11/04/99 = Scene_ID 7036033009930850
Index 5 for Path 36/Row 34 on 10/19/99 = Scene_ID 7036034009929250
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.