Contact Information
Global 30-m impervious-surface dynamic dataset in 2000-2020 (GISD30_2000-2020)
Dataset Overview
How to accurately capture the impervious surface dynamics from time series remote sensing imagery has always been the focus and hotspot of urban and environmental remote sensing research. To tackle this issue, a high confidence training dataset at the global scale was created by utilizing prior land cover data according to a series of extraction rules. The spectral generalization approach and a sample migration strategy were developed to achieve long-term dynamic monitoring of impervious surfaces. The GISD30 dataset was ultimately produced by classifying the time-series Landsat reflectance imagery and integrating the local adaptive random forest model and the spectral generalization approach.
Dataset Details
Spatial Resolution: 30m
Time Resolution: 2000, 2005, 2010, 2015, 2020
Product Number: XDA19090125_010
Create Institution: International Research Center of Big Data for Sustainable Development Goals
Created By: Liangyun Liu; Xiao Zhang
Creation Date: 2022-04-25T16:00:00.000Z
File Size: 4765
Data Format: GeoTiff
Type Of Data: grid
Data Label:
Naming Convention
The product is stored using the WGS84 coordinate system (EPSG: 4326) with a spatial resolution of 30-meter. The output format is GeoTIFF. Each tiled file covers a 5o ×5o geographical grid corresponding to 18,554×18,554 pixels. The dataset contains a total of 961 tiled files. For accurate usage and reference, the GISD30 files are named in the following format: GISD30_1985-2020_E/W***N/S***.tif,where 'E/W***N/S***'is the longitude and latitude coordinates found in the upper left corner of the tile data. Each tiled file contains a single-layer map that showcases the surface status with 0 and 1, representing pervious surfaces and impervious surfaces, respectively.
Data Citation
Liangyun Liu, Xiao Zhang. Global 30-m impervious-surface dynamic dataset in 2000-2020 (GISD30_2000-2020), Beijing: International Research Center of Big Data for Sustainable Development Goals (CBAS), 2022. doi: 10.12237/casearth.625e14c1819aec2a46dcc033
Data Licence Agreement
Users of this product shall clearly indicate the source of the data as "Global 30-m impervious-surface dynamic dataset in 2000- 2020 (GISD30_2000-2020)" in all forms of research output, including, but not limited to, published and unpublished papers, theses, manuscripts, books, reports, data products, and other academic output. The data producers are not responsible for any losses caused by the use of the data. The boundaries and marks used in the maps do not represent any official endorsement by or opinion of the data producers.
