Geodata processing and acquisition

Geodata processing

Geodata processing involves developing digital products from raw data from acquisition operations. It is also about organizing the information so as to adapt it to the needs of the user.

1.      Geographic information systems

The processing of geodata is often done with specialized software called Geographical Information Systems (GIS). A GIS is a computer tool for organizing and presenting geographic data (maps, miscellaneous networks, aerial photographs, etc.) through several levels of information. Associated with each other, these levels represent at best the reality of the terrain or specific objects (roads, buildings, etc.), according to the needs of the users.

2.       Spatial reference Database

Most GIS are associated with a database that allows structured organization and storage of information. This makes it possible to intelligently manage the relationships between the geometry of the objects and their attributes, thereby ensuring consistency during the processing and updating operations. This is known as a spatially referenced database when the geometry of the objects and their coordinates form an integral part of the database.

3.      Representation of information

The dissemination of geodata consists of providing users with means of access to information and / or representation media. The basic and historical element of information dissemination is the map or map. It is a synthetic, simple and understandable way to provide geographic content on a portion of natural or built territory. With the advent of computer science and the development of GIS, broadcast media are now largely digital, whether vector data (maps and maps) or image data (orthophotos, satellite images).

Geodata

Access to this type of information is also possible thanks to Internet technologies that allow the consultation of public databases called geoservers containing a large amount of maps, images and other spatially referenced data. A simple Internet browser is enough to access these servers and to graphically consult geodata.

A map server can be likened to an ATM that the user uses to display maps on his computer. The interactions between the user and the server are performed through a graphical interface and user requests translated into a computer language.