``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: .. code:: console # 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: .. code:: console /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: .. list-table:: :header-rows: 1 :widths: 5 25 50 20 * - # - 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) - `2010-2015 difference info `_ 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 | Land Cover Description | RGB Value | | | in ``gistool``) | | | +====+====================+=================================+===========+ | 1 | 1 | Temperate or sub-polar | RGB (0, | | | | needleleaf forest | 61, 0) | +----+--------------------+---------------------------------+-----------+ | 2 | 2 | Sub-polar taiga needleleaf | RGB (148, | | | | forest | 156, 112) | +----+--------------------+---------------------------------+-----------+ | 3 | 3 | Tropical or sub-tropical | RGB (0, | | | | broadleaf evergreen forest | 99, 0) | +----+--------------------+---------------------------------+-----------+ | 4 | 4 | Tropical or sub-tropical | RGB (30, | | | | broadleaf deciduous forest | 171, 5) | +----+--------------------+---------------------------------+-----------+ | 5 | 5 | Temperate or sub-polar | RGB (20, | | | | broadleaf deciduous forest | 140, 61) | +----+--------------------+---------------------------------+-----------+ | 6 | 6 | Mixed forest | RGB (92, | | | | | 117, 43) | +----+--------------------+---------------------------------+-----------+ | 7 | 7 | Tropical or sub-tropical | RGB (179, | | | | shrubland | 158, 43) | +----+--------------------+---------------------------------+-----------+ | 8 | 8 | Temperate or sub-polar | RGB (179, | | | | shrubland | 138, 51) | +----+--------------------+---------------------------------+-----------+ | 9 | 9 | Tropical or sub-tropical | RGB (232, | | | | grassland | 220, 94) | +----+--------------------+---------------------------------+-----------+ | 10 | 10 | Temperate or sub-polar | RGB (225, | | | | grassland | 207, 138) | +----+--------------------+---------------------------------+-----------+ | 11 | 11 | Sub-polar or polar | RGB (156, | | | | shrubland-lichen-moss | 117, 84) | +----+--------------------+---------------------------------+-----------+ | 12 | 12 | Sub-polar or polar | RGB (186, | | | | grassland-lichen-moss | 212, 143) | +----+--------------------+---------------------------------+-----------+ | 13 | 13 | Sub-polar or polar | RGB (64, | | | | barren-lichen-moss | 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 <./landsat_classes.csv>`__. Land Cover Changes between 2010 and 2015 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ The following file contains the following GeoTIFF data: .. code:: console /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"