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 Map Company 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 28 encompasses whole or portions of several states including the states of Colorado, Wyoming and New Mexico. Questions about the NLCD mapping zone 28 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 32/Row 34 on 04/16/00 = Scene_ID 7032034000010750
Index 2 for Path 33/Row 33 on 03/28/02 = Scene_ID 7033033000208750
Index 2 for Path 33/Row 34 on 03/28/02 = Scene_ID 7033034000208750
Index 2 for Path 33/Row 35 on 03/28/02 = Scene_ID 7033035000208750
Index 3 for Path 34/Row 31 on 04/04/02 = Scene_ID 7034031000209450
Index 4 for Path 34/Row 32 on 04/17/01 = Scene_ID 7034032000110750
Index 4 for Path 34/Row 33 on 04/17/01 = Scene_ID 7034033000110750
Index 4 for Path 34/Row 34 on 04/17/01 = Scene_ID 7034034000110750
Index 5 for Path 34/Row 35 on 04/25/01 = Scene_ID 5034035000111510
Index 6 for Path 35/Row 31 on 05/31/00 = Scene_ID 5035031000015210
Index 6 for Path 35/Row 32 on 05/31/00 = Scene_ID 5035032000015210
Index 7 for Path 35/Row 33 on 05/23/00 = Scene_ID 7035033000014450
Index 8 for Path 35/Row 34 on 05/31/00 = Scene_ID 5035034000015210
LEAF ON (Summer)-
Index 1 for Path 32/Row 34 on 09/07/00 = Scene_ID 7032034000025150
Index 2 for Path 33/Row 33 on 08/13/00 = Scene_ID 7033033000022650
Index 3 for Path 33/Row 34 on 07/10/99 = Scene_ID 7033034009919150
Index 4 for Path 33/Row 35 on 10/14/99 = Scene_ID 7033035009928750
Index14 for Path 34/Row 31 on 07/09/02 = Scene_ID 7034031000219050
Index 5 for Path 34/Row 32 on 06/01/00 = Scene_ID 7034032000015350
Index 6 for Path 34/Row 33 on 07/01/99 = Scene_ID 7034033009918250
Index 7 for Path 34/Row 34 on 07/19/00 = Scene_ID 7034034000020150
Index 8 for Path 34/Row 35 on 07/01/99 = Scene_ID 7034035009918250
Index 9 for Path 35/Row 31 on 07/16/02 = Scene_ID 7035031000219750
Index10 for Path 35/Row 32 on 09/12/00 = Scene_ID 7035032000025650
Index10 for Path 35/Row 33 on 09/12/00 = Scene_ID 7035033000025650
Index10 for Path 35/Row 34 on 09/12/00 = Scene_ID 7035034000025650
LEAF-OFF (Fall)-
Index 1 for Path 32/Row 34 on 10/23/99 = Scene_ID 7032034009929650
Index 2 for Path 33/Row 33 on 10/16/00 = Scene_ID 7033033000029050
Index 3 for Path 33/Row 34 on 10/14/99 = Scene_ID 7033034009928750
Index 3 for Path 33/Row 35 on 10/14/99 = Scene_ID 7033035009928750
Index 4 for Path 34/Row 31 on 10/13/02 = Scene_ID 7034031000228650
Index 5 for Path 34/Row 32 on 11/06/99 = Scene_ID 7034032009931050
Index 5 for Path 34/Row 33 on 11/06/99 = Scene_ID 7034033009931050
Index 5 for Path 34/Row 34 on 11/06/99 = Scene_ID 7034034009931050
Index 5 for Path 34/Row 35 on 11/06/99 = Scene_ID 7034035009931050
Index 6 for Path 35/Row 31 on 11/13/99 = Scene_ID 7035031009931750
Index 6 for Path 35/Row 32 on 11/13/99 = Scene_ID 7035032009931750
Index 7 for Path 35/Row 33 on 10/12/99 = Scene_ID 7035033009928550
Index 7 for Path 35/Row 34 on 10/12/99 = Scene_ID 7035034009928550
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.