Object Definitions
Within the Geodetic Datasource, there are various types of parameters called "Objects" that you can define and combine into Coordinate Reference System Definitions, as well as Transformations between those Objects. For information on a specific Object type, please see:
- Angular Unit Definitions
- Linear Unit Definitions
- Ellipsoid Definitions
- Prime Meridian Definitions
- Area of Use Definitions
- Point Style Definitions
- Datum Definitions
- Coordinate Transformation Definitions
- Coordinate System Definitions
When editing the Geodetic Datasource, an Audit Trail is recorded to track the changes that have been made. For information on this, please see:
Note: When browsing through
the datasource, some objects may be flagged with a red exclamation point
symbol. These objects are not completely defined. The
Geographic Calculator includes a number of datum transformation objects
that require supplementary data files to function properly. Some
of these include horizontal datum transformations and geoid models. These
objects will be unusable until the supplementary files are added. Some
of these are available at our website (https://www.bluemarblegeo.com),
while others are proprietary and must be purchased from a specific government
agency.