Metadata is data about data. Geospatial metadata describes your GIS data according to an established standard to help others who use your maps to understand them. Organizing your data according to standards helps you manage it more efficiently, enforces data quality, and facilitates data sharing. In AutoCAD Map 3D, you can automatically generate metadata for DWGs; their , such as object or feature classes; and non-DWG files.
In 1998, the Federal Geographic Data Committee (FGDC) released the Content Standard for Digital Geospatial Metadata (the ). Its goal is to promote electronic, geospatial information-sharing between various agencies and regions around the world. Some agencies in the United States may be required to create geospatial metadata that complies with this standard.
Conditional elements are “mandatory if applicable.” For example, if a particular data set does not have or need distribution information as defined by the FGDC, you need not complete any of the fields in the Distribution Information section, even if some fields in that section are mandatory.
|Information Type||Description||Requirement||Related Editor|
|Identification Information||Basic information about the data||Mandatory|
|Data Quality Information||Overall quality of the data||Conditional|
|Spatial Data Organization Information||How spatial information is represented in the data||Conditional|
|Spatial Reference Information||Details about the spatial reference of the data, such as coordinates||Conditional|
|Entity and Attribute Information||The features and constraints of the data||Conditional|
|Distribution Information||Who provides the data, and how it can be obtained||Conditional|
|Metadata Reference Information||How current the metadata is, and who maintains it||Mandatory|
Because GIS data is so general, it remains usable outside the United States when formatted with this standard. For example, the FGDC standard shares many common fields with ISO 19139. To learn more about the FGDC and its GIS metadata standard, visit http://www.fgdc.gov/metadata.
AutoCAD Map 3D supports ISO 19139. If your version of AutoCAD Map 3D is for any country except the United States, it is configured with ISO as the default. If you need to switch to a different standard, you can do so in the .