FOV refers to the angular extent of observable world seen at any moment. Humans have 210-degree horizontal visual field without eye movements. Binocular vision covers 114 degrees horizontally in humans. Color vision concentrated in center, motion perception in periphery
Google Earth is a 3D virtual Earth created from aerial, GIS and satellite data. The software is free to use, with the Pro version becoming free in 2015. Images are not real-time but updated frequently from various sources
Google Earth renders 3D Earth representation using satellite imagery. Program covers over 97% of world according to 2019. Available on multiple platforms including desktop, mobile, and web. Includes features like flight simulator, Street View, and historical imagery
Anisotropy describes non-uniformity in different directions. Properties of anisotropic objects vary with measurement direction. Examples include polarized light and wood's grain directional non-uniformity
Mean sea level (MSL) is the average surface level of Earth's coastal waters. MSL is used as a standard datum in navigation and aviation. Sea level varies significantly due to tides, wind, pressure, and temperature
Provides pan-European land cover inventory for 44 thematic classes. Available as vector and 100m raster data. Minimum mapping unit is 25 hectares for status layers. Minimum mapping width is 100m for linear phenomena