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.
Note that the scripts and table descriptions for these two schemas are in section HR Schema and OE Schema, respectively. Figure 4-2, PM Schema illustrates the PM schema. Note that the scripts and table description for the PM schema are at PM Schema. Figure 4-3, SH Schema illustrates the SH schema. Note that the scripts and table description for the SH schema are in section SH Schema. This edition of the book does not illustrate the IX schema, but its scripts and table description are in section IX Schema.