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 MDA Federal Inc. 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 40 encompasses whole or portions of several states including North Dakota and Minnesota. Questions about the NLCD mapping zone 40 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.
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 40 are as follows:
SPRING-
Index 1 for Path 29/Row 26 on 03/10/00 = Scene_ID 7029026000007050
Index 2 for Path 29/Row 27 on 03/02/00 = Scene_ID 5029027000006210
Index 3 for Path 29/Row 28 on 05/05/00 = Scene_ID 5029028000012610
Index 4 for Path 30/Row 26 on 05/10/02 = Scene_ID 7030026000213050
Index 4 for Path 30/Row 27 on 05/10/02 = Scene_ID 7030027000213050
Index 5 for Path 30/Row 28 on 05/18/02 = Scene_ID 5030028000213810
Index 6 for Path 31/Row 26 on 05/12/03 = Scene_ID 5031026000313210
Index 6 for Path 31/Row 27 on 05/12/03 = Scene_ID 5031027000313210
Index 7 for Path 31/Row 28 on 05/19/00 = Scene_ID 5031028000014010
Index 8 for Path 32/Row 26 on 05/16/02 = Scene_ID 5032026000213610
Index 9 for Path 32/Row 27 on 05/18/00 = Scene_ID 7032027000013950
Index10 for Path 32/Row 28 on 05/02/00 = Scene_ID 7032028000012350
Index11 for Path 33/Row 26 on 05/12/01 = Scene_ID 7033026000113250
Index12 for Path 33/Row 27 on 05/12/01 = Scene_ID 7033027000113250
Index13 for Path 34/Row 28 on 05/03/02 = Scene_ID 7029028000212350
Index15 for Path 30/Row 27 on 05/10/02 cloud replacement
LEAF ON (Summer)-
Index 1 for Path 29/Row 26 on 08/01/00 = Scene_ID 7029026000021450
Index 1 for Path 29/Row 27 on 08/01/00 = Scene_ID 7029027000021450
Index 1 for Path 29/Row 28 on 08/01/00 = Scene_ID 7029028000021450
Index 2 for Path 30/Row 27 on 07/13/02 = Scene_ID 7030027000219450
Index 3 for Path 30/Row 26 on 07/26/04 = Scene_ID 5030026000420810
Index 3 for Path 30/Row 28 on 07/13/02 = Scene_ID 7030028000219450
Index 4 for Path 31/Row 26 on 07/30/00 = Scene_ID 7031026000021250
Index 5 for Path 31/Row 27 on 07/01/01 = Scene_ID 7031027000118250
Index 6 for Path 31/Row 28 on 07/14/00 = Scene_ID 7031028000019650
Index 7 for Path 32/Row 26 on 07/11/02 = Scene_ID 7032026000219250
Index 8 for Path 32/Row 27 on 07/03/02 = Scene_ID 5032027000218410
Index 8 for Path 32/Row 28 on 07/03/02 = Scene_ID 5032028000218410
Index 9 for Path 33/Row 26 on 07/12/00 = Scene_ID 7033026000019450
Index 9 for Path 33/Row 27 on 07/12/00 = Scene_ID 7033027000019450
Index10 for Path 34/Row 26 on 07/06/01 = Scene_ID 7034026000118750
Index11 for Path 30/Row 26 on 07/26/04 cloud replacement
Index11 for Path 30/Row 27 on 07/13/02 cloud replacement
Index11 for Path 31/Row 27 on 07/01/01 cloud replacement
Index11 for Path 31/Row 27 on 07/01/01 cloud replacement
LEAF-OFF (Fall)-
Index 1 for Path 29/Row 26 on 10/07/01 = Scene_ID 7029026000128050
Index 2 for Path 29/Row 27 on 10/20/00 = Scene_ID 7029027000029450
Index 2 for Path 29/Row 28 on 10/20/00 = Scene_ID 7029028000029450
Index 3 for Path 30/Row 26 on 09/23/99 = Scene_ID 7030026009926650
Index 4 for Path 30/Row 27 on 09/28/01 = Scene_ID 7030027000127150
Index 5 for Path 30/Row 28 on 09/07/02 = Scene_ID 5030028000225010
Index 6 for Path 31/Row 26 on 09/27/01 = Scene_ID 5031026000127010
Index 6 for Path 31/Row 27 on 09/27/01 = Scene_ID 5031027000127010
Index 6 for Path 31/Row 28 on 09/27/01 = Scene_ID 5031028000127010
Index 7 for Path 32/Row 26 on 09/26/01 = Scene_ID 7032026000126950
Index 7 for Path 32/Row 27 on 09/26/01 = Scene_ID 7032027000126950
Index 7 for Path 32/Row 28 on 09/26/01 = Scene_ID 7032028000126950
Index 8 for Path 33/Row 26 on 09/30/00 = Scene_ID 7033026000027450
Index 9 for Path 33/Row 27 on 09/14/00 = Scene_ID 7033027000025850
Index10 for Path 34/Row 26 on 10/23/00 = Scene_ID 7034026000029750
Index11 for Path 30/Row 26 on 09/23/99 cloud replacement
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)