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 27 encompasses whole or portions of several states including the states of New Mexico, Colorado, Texas, and Oklahoma. Questions about the NLCD mapping zone 27 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 31/Row 34 on 05/11/00 = Scene_ID 7031034000013250
Index 2 for Path 31/Row 35 on 11/01/99 = Scene_ID 7031035009930550
Index 2 for Path 31/Row 36 on 11/01/99 = Scene_ID 7031036009930550
Index 3 for Path 31/Row 37 on 04/25/00 = Scene_ID 7031037000011650
Index 4 for Path 32/Row 33 on 04/16/00 = Scene_ID 7032033000010750
Index 4 for Path 32/Row 34 on 04/16/00 = Scene_ID 7032034000010750
Index 4 for Path 32/Row 35 on 04/16/00 = Scene_ID 7032035000010750
Index 4 for Path 32/Row 36 on 04/16/00 = Scene_ID 7032036000010750
Index 4 for Path 32/Row 37 on 04/16/00 = Scene_ID 7032037000010750
Index 5 for Path 33/Row 33 on 03/28/02 = Scene_ID 7033033000208750
Index 5 for Path 33/Row 34 on 03/28/02 = Scene_ID 7033034000208750
Index 5 for Path 33/Row 35 on 03/28/02 = Scene_ID 7033035000208750
Index 6 for Path 33/Row 36 on 05/09/00 = Scene_ID 7033036000013050
Index 7 for Path 33/Row 37 on 04/07/00 = Scene_ID 7033037000009850
Leaf on (Summer)
Index 1 for Path 31/Row 33 on 10/18/00 = Scene_ID 7031033000029250
Index 2 for Path 31/Row 34 on 06/15/01 = Scene_ID 7031034000116650
Index 3 for Path 31/Row 35 on 08/13/99 = Scene_ID 7031035009922550
Index 3 for Path 31/Row 36 on 08/13/99 = Scene_ID 7031036009922550
Index 4 for Path 31/Row 37 on 09/30/99 = Scene_ID 7031037009927350
Index 5 for Path 32/Row 33 on 06/06/01 = Scene_ID 7032033000115750
Index 6 for Path 32/Row 34 on 09/07/00 = Scene_ID 7032034000025150
Index15 for Path 32/Row 34 on 06/22/01 = Scene_ID 7032034000117350
Index 6 for Path 32/Row 35 on 09/07/00 = Scene_ID 7032035000025150
Index 6 for Path 32/Row 36 on 09/07/00 = Scene_ID 7032036000025150
Index 6 for Path 32/Row 37 on 09/07/00 = Scene_ID 7032037000025150
Index 7 for Path 32/Row 37 on 10/23/99 = Scene_ID 7032037009929650
Index 8 for Path 33/Row 33 on 08/13/00 = Scene_ID 7033033000022650
Index13 for Path 33/Row 33 on 10/16/00 = Scene_ID 7033033000029050
Index 9 for Path 33/Row 34 on 07/10/99 = Scene_ID 7033034009919150
Index10 for Path 33/Row 34 on 07/02/02 = Scene_ID 7033034000218350
Index11 for Path 33/Row 35 on 09/14/00 = Scene_ID 7033035000025850
Index12 for Path 33/Row 36 on 05/31/02 = Scene_ID 7033036000215150
Index14 for Path 33/Row 36 on 09/28/99 = Scene_ID 7033036009927150
Leaf-off (Fall)-
Index 1 for Path 31/Row 34 on 10/18/00 = Scene_ID 7031034000029250
Index 2 for Path 31/Row 35 on 11/01/99 = Scene_ID 7031035009930550
Index 2 for Path 31/Row 36 on 11/01/99 = Scene_ID 7031036009930550
Index 2 for Path 31/Row 37 on 11/01/99 = Scene_ID 7031037009930550
Index 3 for Path 32/Row 33 on 10/09/00 = Scene_ID 7032033000028350
Index 8 for Path 32/Row 33 on 04/16/00 = Scene_ID 7032033000010750
Index 4 for Path 32/Row 34 on 10/23/99 = Scene_ID 7032034009929650
Index 4 for Path 32/Row 35 on 10/23/99 = Scene_ID 7032035009929650
Index 4 for Path 32/Row 36 on 10/23/99 = Scene_ID 7032036009929650
Index 4 for Path 32/Row 37 on 10/23/99 = Scene_ID 7032037009929650
Index 5 for Path 33/Row 33 on 10/16/00 = Scene_ID 7033033000029050
Index 6 for Path 33/Row 34 on 10/14/99 = Scene_ID 7033034009928750
Index 6 for Path 33/Row 35 on 10/14/99 = Scene_ID 7033035009928750
Index 7 for Path 33/Row 36 on 10/30/99 = Scene_ID 7033036009930350
Index 7 for Path 33/Row 37 on 10/30/99 = Scene_ID 7033037009930350
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.