Types of Aerial Photography. These brief descriptions cover the most common types of conventional aerial photographs. OBLIQUE - The most common type of aerial photograph. It is shot looking down at an angle to the ground (ie not directly overhead as in a 'Vertical' or 'Near Vertical'). Obliques can be either 'High' or 'Low'.
The star schema and the snowflake schema are ways to organize data marts or entire data warehouses using relational databases. Both of them use dimension tables to describe data aggregated in a fact table. Everyone sells something, be it knowledge, a product, or a service.
A snowflake is a single ice crystal that has achieved a sufficient size, and may have amalgamated with others, then falls through the Earth's atmosphere as snow. Each flake nucleates around a dust particle in supersaturated air masses by attracting supercooled cloud water droplets, which freeze and accrete in crystal form. Complex shapes emerge as the flake moves through differing temperature and humidity zones in the atmosphere, such that individual snowflakes differ in detail from one another,