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 25 encompasses whole or portions of several states including the states of New Mexico and Texas. Questions about the NLCD mapping zone 25 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 37 on 04/16/00 = Scene_ID 7032037000010750
Index 2 for Path 33/Row 35 on 03/28/02 = Scene_ID 7033035000208750
Index 3 for Path 33/Row 36 on 05/09/00 = Scene_ID 7033036000013050
Index 4 for Path 33/Row 37 on 04/07/00 = Scene_ID 7033037000009850
Index 5 for Path 33/Row 38 on 04/23/00 = Scene_ID 7033038000011450
Index 6 for Path 34/Row 35 on 04/25/01 = Scene_ID 5034035000111510
Index 7 for Path 34/Row 36 on 04/14/00 = Scene_ID 7034036000010550
Index 7 for Path 34/Row 37 on 04/14/00 = Scene_ID 7034037000010550
Index 8 for Path 34/Row 38 on 04/30/00 = Scene_ID 7034038000012150
Index 9 for Path 35/Row 37 on 05/07/00 = Scene_ID 7035037000012850
Index10 for Path 35/Row 38 on 04/05/00 = Scene_ID 7035038000009650
Index11 for Path 36/Row 37 on 04/12/00 = Scene_ID 7036037000010350
Index11 for Path 36/Row 38 on 04/12/00 = Scene_ID 7036038000010350
LEAF ON (Summer)-
Index 1 for Path 32/Row 37 on 10/23/99 = Scene_ID 7032037009929650
Index 2 for Path 33/Row 35 on 09/14/00 = Scene_ID 7033035000025850
Index11 for Path 33/Row 35 on 10/14/99 = Scene_ID 7033035009928750
Index 3 for Path 33/Row 36 on 09/28/99 = Scene_ID 7033036009927150
Index 3 for Path 33/Row 37 on 09/28/99 = Scene_ID 7033037009927150
Index 4 for Path 33/Row 38 on 09/12/99 = Scene_ID 7033038009925550
Index 5 for Path 34/Row 35 on 07/01/99 = Scene_ID 7034035009918250
Index 6 for Path 34/Row 36 on 08/26/02 = Scene_ID 7034036000223850
Index 7 for Path 34/Row 37 on 09/05/00 = Scene_ID 7034037000024950
Index 8 for Path 34/Row 38 on 07/01/99 = Scene_ID 7034038009918250
Index 9 for Path 35/Row 37 on 09/12/00 = Scene_ID 7035037000025650
Index 9 for Path 35/Row 38 on 09/12/00 = Scene_ID 7035038000025650
Index10 for Path 36/Row 37 on 06/15/00 = Scene_ID 7036037000016750
Index10 for Path 36/Row 38 on 06/15/00 = Scene_ID 7036038000016750
LEAF-OFF (Fall)-
Index 1 for Path 32/Row 37 on 10/23/99 = Scene_ID 7032037009929650
Index 2 for Path 33/Row 35 on 10/14/99 = Scene_ID 7033035009928750
Index 3 for Path 33/Row 36 on 10/30/99 = Scene_ID 7033036009930350
Index 3 for Path 33/Row 37 on 10/30/99 = Scene_ID 7033037009930350
Index 4 for Path 33/Row 38 on 11/15/99 = Scene_ID 7033038009931950
Index 5 for Path 34/Row 35 on 11/06/99 = Scene_ID 7034035009931050
Index 5 for Path 34/Row 36 on 11/06/99 = Scene_ID 7034036009931050
Index 6 for Path 34/Row 37 on 10/21/99 = Scene_ID 7034037009929450
Index 6 for Path 34/Row 38 on 10/21/99 = Scene_ID 7034038009929450
Index 7 for Path 35/Row 37 on 11/13/99 = Scene_ID 7035037009931750
Index 7 for Path 35/Row 38 on 11/13/99 = Scene_ID 7035038009931750
Index 8 for Path 36/Row 37 on 10/19/99 = Scene_ID 7036037009929250
Index 8 for Path 36/Row 38 on 10/19/99 = Scene_ID 7036038009929250
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.