====== Orbit Annotation File ======


**OAF** stands for Orbit Annotation File and is a file format (filename extension **.oaf**) developed by //Orbit Geospatial Technologies// for saving annotations in a file. Annotations (or //Redlining//) are tools to complement the map data with temporary notes or sketches. 


=== Structure ===

An Annotation consists out of some Annotation Objects.  An Annotation Object is a rectangle, a line, a text (See [[211:desktop:tools:annotations|annotation types]]).  \\  

=== Reasons to use ===

  * An Annotation can be temporary, can be stored in a file, or can be **stored as attribute to a spatial object** (See [[211:desktop:dataset:contents:naming|]]).
  * Since Orbit annotations are georeferenced, they remember exact positions and can be exchanged with other Orbit users. 


 === Create and Update ===

  * create a new annotation file from : Map 2D > Tools > Anno > File Access > New. Don't forget to save your anotation objects as an AOF file
  * update an anotation file from : Map 2D > Tools > Anno > File Access > Open. Don't forget to save your updates.