Landsat Geospatial Dataset
In this file, the necessary technical details of the dataset is explained.
Location of the Landsat Dataset Files
The LandSat geospatial dataset files are located under the following
directory accessible from multiple clusters:
# DRAC Graham HPC location
/project/rpp-kshook/Model_Output/Landsat/ #rpp-kshook allocation
# UCalgary ARC HPC location
/work/comphyd_lab/data/geospatial-data/Landsat #comphyd_lab allocation
# Perdue University Anvil HPC location
/anvil/datasets/geospatial/NALCMS # Perdue University's Anvil cluster
And the structure of the files is as following:
/path/to/dataset/dir/
├── land_change_2010v2_2015v2_30m_tif.zip
├── land_cover_2005v3_250m_tif.zip
├── land_cover_2010v2_250m_tif.zip
├── land_cover_2010v2_30m_tif.zip
├── land_cover_2015v2_30m_tif.zip
├── land_cover_2020_30m_tif.zip
└── dl-landcover.sh
Spatial and Temporal Extents
The spatial extent of this dataset (so far only NALCMS that is a
land cover dataset) covers longitudes from approximately -180 to
-50 degress and latitudes from approximately +14 to +84
degress. This dataset is available for 2005 and 2020. Furthermore, one
static dataset variable is also included demonstrating the gains and
losses of various land covers between 2010 and 2015. Please see the list
of variables for more information.
Note
The 250m resolution datasets for 2005 and 2010 are not Landsat
products, but MODIS. However, as a temporary measure, these two
datasets are included in the landsat workflow in gistool.
Dataset Variables
This variables of this dataset are detailed in the table below:
# |
Variable Name (used in gistool) |
Description |
Comments |
|---|---|---|---|
1 |
land-cover |
Land cover classes for 2005, 2010, 2015 and 2020 |
2005 dataset info, 2010-30m dataset info, 2010-250m dataset info, 2015 dataset info, 2020 dataset info |
2 |
land-cover-change |
Land cover change (between 2010 and 2015) |
Other relevant information
Land Cover Types
Below the land cover types for each values of the .tif files is
detailed based on [1].
# |
Class Value (used
in |
Land Cover Description |
RGB Value |
|---|---|---|---|
1 |
1 |
Temperate or sub-polar needleleaf forest |
RGB (0, 61, 0) |
2 |
2 |
Sub-polar taiga needleleaf forest |
RGB (148, 156, 112) |
3 |
3 |
Tropical or sub-tropical broadleaf evergreen forest |
RGB (0, 99, 0) |
4 |
4 |
Tropical or sub-tropical broadleaf deciduous forest |
RGB (30, 171, 5) |
5 |
5 |
Temperate or sub-polar broadleaf deciduous forest |
RGB (20, 140, 61) |
6 |
6 |
Mixed forest |
RGB (92, 117, 43) |
7 |
7 |
Tropical or sub-tropical shrubland |
RGB (179, 158, 43) |
8 |
8 |
Temperate or sub-polar shrubland |
RGB (179, 138, 51) |
9 |
9 |
Tropical or sub-tropical grassland |
RGB (232, 220, 94) |
10 |
10 |
Temperate or sub-polar grassland |
RGB (225, 207, 138) |
11 |
11 |
Sub-polar or polar shrubland-lichen-moss |
RGB (156, 117, 84) |
12 |
12 |
Sub-polar or polar grassland-lichen-moss |
RGB (186, 212, 143) |
13 |
13 |
Sub-polar or polar barren-lichen-moss |
RGB (64, 138, 112) |
14 |
14 |
Wetland |
RGB (107, 163, 138) |
15 |
15 |
Cropland |
RGB (230, 174, 102) |
16 |
16 |
Barren lands |
RGB (168, 171, 174) |
17 |
17 |
Urban |
RGB (220, 33, 38) |
18 |
18 |
Water |
RGB (76, 112, 163) |
19 |
19 |
Snow and ice |
RGB (255, 250, 255) |
Also, the details of the above table has been included in the following files: landsat_classes.csv.
Land Cover Changes between 2010 and 2015
The following file contains the following GeoTIFF data:
/path/to/dataset/dir/land_change_2010v2_2015v2_30m_tif.zip
├── NA_NALCMS_2010v2_2015v2_30m_barren_land_loss_and_gain.tif
├── NA_NALCMS_2010v2_2015v2_30m_cropland_loss_and_gain.tif
├── NA_NALCMS_2010v2_2015v2_30m_forest_loss_and_gain.tif
├── NA_NALCMS_2010v2_2015v2_30m_grassland_loss_and_gain.tif
├── NA_NALCMS_2010v2_2015v2_30m_shrubland_loss_and_gain.tif
├── NA_NALCMS_2010v2_2015v2_30m_snow_ice_loss_and_gain.tif
├── NA_NALCMS_2010v2_2015v2_30m_urban_loss_and_gain.tif
├── NA_NALCMS_2010v2_2015v2_30m_water_loss_and_gain.tif
├── NA_NALCMS_2010v2_2015v2_30m_wetland_loss_and_gain.tif
└── NA_NALCMS_land_change_2010v2_2015v2_30m.tif
Based on the metadata also available in the mentioned .zip file, the
GeoTIFF data containing the *_land_loss_and_gain.tif phrase in their
file name contain “[g]eneral land cover gains an losses […] at the North
American scale […] for the following land cover class groups:”
1. Forest
2. Shrubland
3. Grassland
4. Wetland
5. Cropland
6. Barren Land
7. Urban and Built-up
8. Water
9. Snow and Ice
And, the pixel values of the mentioned .tif files are as following:
# |
Pixel Value |
Value Description |
|---|---|---|
1 |
1 |
Gain |
2 |
2 |
Loss |
Furthermore, the GeoTIFF data named
NA_NALCMS_land_change_2010v2_2015v2_30m.tif also contains the
landcover change data. Each pixel value of the GeoTIFF file contains
information regarding transformations between different landcover
classes of the dataset at the North American scale. Each pixel values of
the file contains three or four digits, with “[t]he first one or two
digits in each pixel value show the land cover class in 2010, while the
third and four digits show the land cover class in 2015.” An example of
digit values are given in the following:
105 = Class 1 to 5 "Temperate or sub-polar needleleaf forest" to "Temperate or sub-polar broadleaf deciduous forest"
206 = Class 2 to 6 "Sub-polar taiga needleleaf forest" to "Mixed forest"
814 = Class 8 to 14 "Temperate or sub-polar shrubland" to "Wetland"
915 = Class 9 to 15 "Tropical or sub-tropical grassland" to "Cropland"
1018 = Class 10 to 18 "Temperate or sub-polar grassland" to "Water"
1502 = Class 15 to 02 "Cropland" to "Sub-polar taiga needleleaf forest"
1716 = Class 17 to 16 "Urban and built-up" to "Barren land"
1913 = Class 19 to 01 "Snow and ice" to "Sub-polar or polar barren-lichen-moss"