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Most of these indices make use of the relationship between red and near-infrared (NIR) bands of satellite images to generate vegetation properties. Several vegetation indices have been developed; scientists apply these via remote sensing to effectively classify forest cover and land use patterns.
SoilGrids1km is a collection of updatable soil property and class maps of the world at a resolution of 1 km produced using state-of-the-art model-based statistical methods. Presents estimates (means and 90% confidence intervals) for pH, texture (sa, si, cl), organic carbon and more for 6 depth layers up to 2 m depth. Harmonized World Soil Database
Multispectral imaging can be employed for investigation of paintings and other works of art. [3] The painting is irradiated by ultraviolet, visible and infrared rays and the reflected radiation is recorded in a camera sensitive in this region of the spectrum. The image can also be registered using the transmitted instead of reflected radiation.
These thematic mappers take images in multiple wavelengths of electromagnetic radiation (multi-spectral) and are usually found on Earth observation satellites, including (for example) the Landsat program or the IKONOS satellite. Maps of land cover and land use from thematic mapping can be used to prospect for minerals, detect or monitor land ...
One of the useful resources for accessing satellite imagery is Google Earth. This platform includes a range of different satellite and aerial images, such as the NASA LANDSAT series, Ikonos, QuickBird, GeoEye alongside more. [15] The Cold War CORONA satellite photographs have been used extensively for base maps and provisional interpretation. [15]
6- monthly NDVI average for Australia, 1 Dec 2012 to 31 May 2013 [1]. A vegetation index (VI) is a spectral imaging transformation of two or more image bands designed to enhance the contribution of vegetation properties and allow reliable spatial and temporal inter-comparisons of terrestrial photosynthetic activity and canopy structural variations.
Modifiable areal unit problem (MAUP): NDVI is ubiquitous as an index of vegetation. Since mapping and monitoring of vegetation takes place via ‘big data’ image processing systems. These systems may use pixel- or object-based algorithms to assess vegetation health, evapotranspiration, and other ecosystem functions. When a category of ...
A Geographical Information System (GIS) is used within digital archaeology to document, survey and analyse the spatial data of archaeological sites. The use of a GIS within the study of archaeology involves in-field analysis and collection of archaeological and environmental data, predominantly through aerial photography, spatial cognition, digital maps [1] and satellite imaging. [6]