There are two main models for storing and representing spatial data in a Geographic Information System (GIS): the raster the vector models:
Raster Data – raster (or grid cell type) data can be used for analyzing, overlaying, and modelling area features such as soil types or forested areas. Raster data are generally typically scanned in from [...]

In this section we will examine Oracle database, how this product can be suitable for our GIS projects.
Oracle products are extraordinarily careful with data: For safety, they write all changes to data in two separate places—first to a transaction log and then to the database data file. Support transactions, which guarantees that if a mistake [...]