What is a geographic database?
1. A database in which geographic information is store by x-y coordinates of single points or points which identify the boundaries of lines (or polylines, which sometimes represent the boundaries of polygons). Different attributes characterize the objects stored in these databases.
What does it mean to normalize data in a database?
Normalization is the process of organizing data in a database. This includes creating tables and establishing relationships between those tables according to rules designed both to protect the data and to make the database more flexible by eliminating redundancy and inconsistent dependency.
What is normalization in geography?
Geographic Normalization seeks to minimize possible distortions of analysis generated by irregular polygons by replacing them with polygons of regular shape and size. This provides an elegant, eye-pleasing and precise alternative, capable of showing initially unknown patterns.
What is geographic data used for?
What is Geodata Used For? Geospatial data is used to visually depict and better understand the impact of human activity based on a specific geographic location.
What is the best database for geospatial data?
The most popular in the world are Postgresql-PostGIS and Oracle-Spatial (locator). Postgresql-PostGIS is the most advanced opensource Spatial DB. It is reliable, used successful in many productive systems, big community and tested on many systems.
How do spatial databases work?
A spatial database is a general-purpose database (usually a relational database) that has been enhanced to include spatial data that represents objects defined in a geometric space, along with tools for querying and analyzing such data.
How is spatial data stored?
Storing and managing spatial data Dataset tables—Each dataset in the geodatabase is stored in one or more tables. The dataset tables work with the system tables to manage data. System tables—The geodatabase system tables keep track of the contents of each geodatabase.
What is data normalization in GIS?
normalization. [data management] The process of organizing, analyzing, and cleaning data to increase efficiency for data use and sharing. Normalization usually includes data structuring and refinement, redundancy and error elimination, and standardization.