NASA가 운영중인 Landsat 위성영상을 가공하여 만든 남한 지역의 최적토양조정식생지수 영상이며, 30m 해상도이고, 파일 포맷은 ascii, grid, geotiff이다.- 2020년에 한반도를 촬영한 Landsat8 (NASA 및 USGS 운영중) 영상을 가공하여 제작한 최적 토양 조정 식생지수 (OSAVI: Optimized Soil Adjusted Vegetation Index)- Landsat8 제공 데이터의 band4(Red), band5(NIR) 조합식 활용-OSAVI는 캐노피 밀도의 변화 정도를 측정하는 데에 사용할 수 있는 지표로 농업 모니터링에 최적화되어 있다. 위에서 바라보았을 때 토양이 보이는 상대적으로 식물이 희박한 지역에서 가장 잘 사용되고 통양의 밝기에 민감하지 않다.- UTM-K(EPSG:5179), 30m*30m 라스터형식- 남한 통판 자료와 행정구역별 자료 포함- 데이터 확장자 설명 -geotiff : 지리 참조 정보가 포함되어 있는 이미지 파일형식의 데이터 입니다. (.tiff)grid: 각 격자에 고유한 값이 저장되어있는 Esri사 고유의 래스터 파일형식의 데이터입니다. (.grid)ASCII: 래스터의 속성을 정의하는 헤더 정보와 공백으로 구분 된 각 셀의 값으로 래스터를표현하는 텍스트 파일이며, 프로그램간 자료 호환을 위해 만들어진 파일입니다. (.asc)- 활용된 위성영상 출처 -* 본 산출물의 입력자료로 활용한 Landsat과 Sentinel 위성영상은 각각 NASA 및 USGS와 ESA에서 소유하고 있으며, 다음의 사이트에서 각각 수집하였음. 본 산출물은 이러한 영상을 처리 및 분석 등 가공을 한 데이터임. Landsat 데이터는 Earth Explorer(https://earthexplorer.usgs.gov/)에서 다운로드 가능하며, Sentinel 데이터는 Copernicus Open Access Hub (https://scihub.copernicus.eu/dhus/#/home)을 통하여 다운로드 가능. 지형, 지질 등 지표면 및 지하 현황 파악 및 분석을 위한 기초 데이터산사태, 홍수, 지진 등 자연재해 분석을 위한 기초 데이터지하수, 광물자원, 골재 등 지하자원 개발을 위한 기초 데이터도시 및 토지 개발, 도로, 철도 적지 선정 등을 위한 기초 데이터지형 및 지질과 관련된 인공지능 비즈니스 적용을 위한 기본 데이터로 활용엔지니어링 업체, 대학 및 연구기관의 실무 및 교육/연구용

The Operational Land Imager (OLI) and Thermal Infrared Sensor (TIRS) are onboard the Landsat 8 satellite, have acquired images of the Earth since February 2013. The sensors collect images of the Earth with a 16-day repeat cycle, referenced to the Worldwide Reference System-2. The approximate scene size is 170 km north-south by 183 km east-west (106 mi by 114 mi). Landsat 8 image data files consist of 11 spectral bands with a spatial resolution of 30 meters for bands 1-7 and bands 9-11; 15-meters for the panchromatic band 8. Delivered Landsat 8 Level-1 data typically include both OLI and TIRS data files; however, there may be OLI-only and/or TIRS-only scenes in the USGS archive. A Quality Assurance (QA.tif) band is also included. This file provides bit information regarding conditions that may affect the accuracy and usability of a given pixel – clouds, water or snow, for example.

Landsat represents the world's longest continuously acquired collection of space-based moderate-resolution land remote sensing data. Four decades of imagery provides a unique resource for those who work in agriculture, geology, forestry, regional planning, education, mapping, and global change research. Landsat images are also invaluable for emergency response and disaster relief.

Landsat satellite data have been produced, archived, and distributed by the U.S. Geological Survey (USGS) since 1972. Users rely on these data for historical study of land surface change but shoulder the burden of post-production processing to create applications-ready data sets.

'The USGS Earth Resources Observation and Science (EROS) Center archive holds data collected by the Landsat suite of satellites, beginning with Landsat 1 in 1972 through the latest Landsat Mission.'

The USGS Earth Resources Observation and Science (EROS) Center archive holds data collected by the Landsat suite of satellites, beginning with Landsat 1 in 1972. All Landsat data held in the USGS EROS archive are available for download at no charge.

The NASA Making Earth System Data Records for Use in Research Environments (MEaSUREs) (https://earthdata.nasa.gov/about/competitive-programs/measures) Global Web-Enabled Landsat Data Monthly (GWELDMO) Version 3 data product provides Landsat data at 30 meter (m) resolution for terrestrial non-Antarctica locations over monthly reporting periods for the 2010 epoch. GWELD data products are generated from all available Landsat 4 and 5 Thematic Mapper (TM) and Landsat 7 Enhanced Thematic Mapper Plus (ETM+) data in the U.S. Geological Survey (USGS) Landsat archive. The GWELD suite of products provide consistent data to derive land cover as well as geophysical and biophysical information for regional assessment of land surface dynamics.The GWELD products include Nadir Bidirectional Reflectance Distribution Function (BRDF)-Adjusted Reflectance (NBAR) for the reflective wavelength bands and top of atmosphere (TOA) brightness temperature for the thermal bands. The products are defined in the Sinusoidal coordinate system to promote continuity of NASA’s Moderate Resolution Imaging Spectroradiometer (MODIS) land tile grid.Provided in the GWELDMO product are layers for surface reflectance bands 1 through 5 and 7, TOA brightness temperature for thermal bands, Normalized Difference Vegetation Index (NDVI), day of year, ancillary angle, and data quality information. A low-resolution red, green, blue (RGB) browse image of bands 5, 4, 3 is also available for each granule.Known Issues* GWELDMO known issues can be found in Section 4 of the Algorithm Theoretical Basis Document (ATBD). Please note that the version 3.0 GWELD products for 2009, 2010 and 2011 are defined in HDF4 which cannot be read correctly by GDAL/ArcGIS. This is not an issue for the version 3.1 GWELD products

Landsat satellite data have been produced, archived, and distributed by the U.S. Geological Survey (USGS) since 1972. Users rely on these data for historical study of land surface change but shoulder the burden of post-production processing to create applications-ready data sets.

The USGS Earth Resources Observation and Science (EROS) Center archive holds data collected by the Landsat suite of satellites, beginning with Landsat 1 in 1972. All Landsat data held in the USGS EROS archive are available for download at no charge. In 2021, all Landsat data were processed into Landsat Collection 2. Collection 2 data are the newest and currently the preferred Landsat products. Landsat Collection 1 data and products were removed from public access on December 30, 2022.

The USGS Earth Resources Observation and Science (EROS) Center archive holds data collected by the Landsat suite of satellites, beginning with Landsat 1 in 1972. All Landsat data held in the USGS EROS archive are available for download at no charge. In 2021, all Landsat data were processed into Landsat Collection 2. Collection 2 data are the newest and currently the preferred Landsat products. Landsat Collection 1 data and products were removed from public access on December 30, 2022.