Homer, C., C. Huang, L. Yang, B. Wylie and M. Coan, 2004. Development of a 2001 national land cover database for the United States. Photogrammetric Engineering and Remote Sensing.
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 29 encompasses whole or portions of several states including Montana, Wyoming, North Dakota, and South Dakota. Questions about the NLCD mapping zone 29 can be directed to the NLCD 2001 land cover mapping team at the National Center, EROS, Sioux Falls, SD (605) 594-6151 or mrlc@usgs.gov.
By combining the training data with Landsat spectral data and other ancillary data, percent imperviousness prediction models were developed using a regression tree algorithm (named "Cubist"). All data layers used as input for running the Cubist in order to establish the prediction model for imperviousness are listed in the "Supplemental Information" section. Three ancillary data sets were used for urban/suburban delineation masking, which is essential to confine the imperviousness mapping within the developed areas.
After the best combination of possible input data layers had been determined and the final percent impervious layer produced, the urban mask created was used to eliminate those pixels from the final percent impervious file that fall outside identified impervious surface areas. Thus, the impervious pixels identified within the mask were retained, while all non-impervious surface pixels were removed from the final product. This corrected for any small areas of pixels that may have been included as part of the impervious surface layer because their spectral signature was not covered in the Cubist modeling process. Finally, visual inspection of imperviousness layer was made with limited manual editing to eliminate non-urban areas based on area of interest delineated by the mapping team.
Acquisition dates of Landsat ETM+ (TM) scenes used for land cover classification in zone 29 are as follows:
SPRING-
Index 1 for Path 33/Row 29 on 05/12/01 = Scene_ID 7033029000113250
Index 1 for Path 33/Row 30 on 05/12/01 = Scene_ID 7033030000113250
Index 2 for Path 33/Row 30 on 05/31/02 = Scene_ID 7033030000215150
Index 3 for Path 33/Row 31 on 04/13/02 = Scene_ID 7033031000210350
Index 4 for Path 34/Row 28 on 04/25/01 = Scene_ID 5034028000111510
Index 4 for Path 34/Row 29 on 04/25/01 = Scene_ID 5034029000111510
Index 5 for Path 34/Row 29 on 06/01/00 = Scene_ID 7034029000015350
Index 6 for Path 34/Row 30 on 04/04/02 = Scene_ID 7034030000209450
Index 6 for Path 34/Row 31 on 04/04/02 = Scene_ID 7034031000209450
Index 7 for Path 35/Row 27 on 05/13/02 = Scene_ID 7035027000213350
Index 8 for Path 35/Row 28 on 04/16/01 = Scene_ID 5035028000110610
Index 7 for Path 35/Row 29 on 05/13/02 = Scene_ID 7035029000213350
Index 9 for Path 35/Row 30 on 04/21/00 = Scene_ID 7035030000011250
Index10 for Path 35/Row 30 on 05/23/00 = Scene_ID 7035030000014450
Index11 for Path 35/Row 30 on 06/08/00 = Scene_ID 7035030000016050
Index12 for Path 36/Row 28 on 05/17/01 = Scene_ID 7036028000113750
Index13 for Path 36/Row 29 on 04/28/00 = Scene_ID 7036029000011950
Index14 for Path 36/Row 30 on 05/25/01 = Scene_ID 5036030000114510
Index15 for Path 37/Row 28 on 05/24/01 = Scene_ID 7037028000114450
Index15 for Path 37/Row 29 on 05/24/01 = Scene_ID 7037029000114450
LEAF ON (Summer)-
Index 1 for Path 33/Row 29 on 07/02/02 = Scene_ID 7033029000218350
Index 2 for Path 33/Row 30 on 05/31/02 = Scene_ID 7033030000215150
Index 3 for Path 33/Row 31 on 07/28/00 = Scene_ID 7033031000021050
Index 4 for Path 34/Row 28 on 07/23/01 = Scene_ID 7034028000120450
Index 5 for Path 34/Row 29 on 07/09/02 = Scene_ID 7034029000219050
Index 5 for Path 34/Row 30 on 07/09/02 = Scene_ID 7034030000219050
Index 5 for Path 34/Row 31 on 07/09/02 = Scene_ID 7034031000219050
Index 6 for Path 35/Row 27 on 06/30/02 = Scene_ID 7035027000218150
Index 6 for Path 35/Row 28 on 06/30/02 = Scene_ID 7035028000218150
Index 6 for Path 35/Row 29 on 06/30/02 = Scene_ID 7035029000218150
Index 7 for Path 35/Row 30 on 07/16/02 = Scene_ID 7035030000219750
Index 8 for Path 36/Row 28 on 08/16/99 = Scene_ID 7036028009922850
Index 9 for Path 36/Row 29 on 07/02/03 = Scene_ID 5036029000318310
Index10 for Path 36/Row 30 on 08/16/99 = Scene_ID 7036030009922850
Index11 for Path 37/Row 28 on 07/30/02 = Scene_ID 7037028000221150
Index11 for Path 37/Row 29 on 07/30/02 = Scene_ID 7037029000221150
LEAF-OFF (Fall)-
Index 1 for Path 33/Row 29 on 09/14/00 = Scene_ID 7033029000025850
Index 2 for Path 33/Row 30 on 10/16/00 = Scene_ID 7033030000029050
Index 2 for Path 33/Row 31 on 10/16/00 = Scene_ID 7033031000029050
Index 3 for Path 34/Row 28 on 10/07/00 = Scene_ID 7034028000028150
Index 4 for Path 34/Row 29 on 10/23/00 = Scene_ID 7034029000029750
Index 5 for Path 34/Row 30 on 10/13/02 = Scene_ID 7034030000228650
Index 5 for Path 34/Row 31 on 10/13/02 = Scene_ID 7034031000228650
Index 6 for Path 35/Row 27 on 10/01/01 = Scene_ID 7035027000127450
Index 7 for Path 35/Row 28 on 09/28/00 = Scene_ID 7035028000027250
Index 8 for Path 35/Row 29 on 09/12/00 = Scene_ID 7035029000025650
Index 6 for Path 35/Row 30 on 10/01/01 = Scene_ID 7035030000127450
Index 9 for Path 36/Row 27 on 09/22/01 = Scene_ID 7036027000126550
Index 9 for Path 36/Row 28 on 09/22/01 = Scene_ID 7036028000126550
Index 9 for Path 36/Row 29 on 09/22/01 = Scene_ID 7036029000126550
Index 9 for Path 36/Row 30 on 09/22/01 = Scene_ID 7036030000126550
Index10 for Path 37/Row 28 on 10/18/02 = Scene_ID 7037028000229150
Index10 for Path 37/Row 29 on 10/18/02 = Scene_ID 7037029000229150
Landsat data and ancillary data used for the imperviousness prediction -
Data Type of DEM composed of 1 band and a Continuous Variable Type.
Data Type of Slope composed of 1 band and a 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.
Ancillary data used for urban area masking include:
1. NOAA Defense Meteorological Satellite Program 1 km city light data (1 band)
2. MRLC 1992 classification (1 band)
3. TIGER 2000 roads (1 band)