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 26 encompasses whole or portions of several states including the states of Texas and New Mexico . Questions about the NLCD mapping zone 26 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 29/Row 38 on 02/12/02 = Scene_ID 7029038000204350
Index 2 for Path 29/Row 39 on 02/25/01 = Scene_ID 7029039000105650
Index 2 for Path 29/Row 40 on 02/25/01 = Scene_ID 7029040000105650
Index 3 for Path 30/Row 38 on 04/08/02 = Scene_ID 7030038000209850
Index 3 for Path 30/Row 39 on 04/08/02 = Scene_ID 7030039000209850
Index 3 for Path 30/Row 40 on 04/08/02 = Scene_ID 7030040000209850
Index 4 for Path 31/Row 37 on 02/21/00 = Scene_ID 7031037000005250
Index 4 for Path 31/Row 38 on 02/21/00 = Scene_ID 7031038000005250
Index 5 for Path 31/Row 39 on 03/11/01 = Scene_ID 7031039000107050
Index 5 for Path 31/Row 40 on 03/11/01 = Scene_ID 7031040000107050
Index 6 for Path 32/Row 37 on 04/03/01 = Scene_ID 7032037000109350
Index 7 for Path 32/Row 38 on 04/16/00 = Scene_ID 7032038000010750
Index 8 for Path 32/Row 39 on 03/24/03 = Scene_ID 7032039000308350
Index 9 for Path 33/Row 37 on 04/07/00 = Scene_ID 7033037000009850
Index10 for Path 33/Row 38 on 04/23/00 = Scene_ID 7033038000011450
LEAF ON (Summer)-
Index 1 for Path 29/Row 38 on 05/19/02 = Scene_ID 7029038000213950
Index 1 for Path 29/Row 39 on 05/19/02 = Scene_ID 7029039000213950
Index 2 for Path 29/Row 40 on 05/03/02 = Scene_ID 7029040000212350
Index 3 for Path 30/Row 37 on 05/23/01 = Scene_ID 7030037000114350
Index 3 for Path 30/Row 38 on 05/23/01 = Scene_ID 7030038000114350
Index 3 for Path 30/Row 39 on 05/23/01 = Scene_ID 7030039000114350
Index 9 for Path 30/Row 39 on 09/28/01 = Scene_ID 7030039000127150
Index 3 for Path 30/Row 40 on 05/23/01 = Scene_ID 7030040000114350
Index 4 for Path 31/Row 37 on 04/25/00 = Scene_ID 7031037000011650
Index 4 for Path 31/Row 38 on 04/25/00 = Scene_ID 7031038000011650
Index 5 for Path 31/Row 39 on 05/11/00 = Scene_ID 7031039000013250
Index 5 for Path 31/Row 40 on 05/11/00 = Scene_ID 7031040000013250
Index 6 for Path 32/Row 37 on 05/11/03 = Scene_ID 7032037000313150
Index 7 for Path 32/Row 38 on 05/02/00 = Scene_ID 7032038000012350
Index 7 for Path 32/Row 39 on 05/02/00 = Scene_ID 7032039000012350
Index 8 for Path 33/Row 38 on 05/15/02 = Scene_ID 7033038000213550
LEAF-OFF (Fall)-
Index 1 for Path 29/Row 38 on 10/07/01 = Scene_ID 7029038000128050
Index 2 for Path 29/Row 39 on 09/24/02 = Scene_ID 7029039000226750
Index 3 for Path 29/Row 40 on 10/04/00 = Scene_ID 7029040000027850
Index 4 for Path 30/Row 38 on 10/14/01 = Scene_ID 7030038000128750
Index 5 for Path 30/Row 39 on 09/28/01 = Scene_ID 7030039000127150
Index 4 for Path 30/Row 40 on 10/14/01 = Scene_ID 7030040000128750
Index 6 for Path 31/Row 37 on 11/01/99 = Scene_ID 7031037009930550
Index 6 for Path 31/Row 38 on 11/01/99 = Scene_ID 7031038009930550
Index 7 for Path 31/Row 39 on 09/30/99 = Scene_ID 7031039009927350
Index 7 for Path 31/Row 40 on 09/30/99 = Scene_ID 7031040009927350
Index 8 for Path 32/Row 37 on 10/23/99 = Scene_ID 7032037009929650
Index 8 for Path 32/Row 38 on 10/23/99 = Scene_ID 7032038009929650
Index 8 for Path 32/Row 39 on 10/23/99 = Scene_ID 7032039009929650
Index 9 for Path 33/Row 37 on 10/30/99 = Scene_ID 7033037009930350
Index10 for Path 33/Row 38 on 11/15/99 = Scene_ID 7033038009931950
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.