Ambient settings for a survey document are held in the AeccSurveyDocument.Settings property, an object of type AeccSurveySettingsRoot. AeccSurveySettingsRoot inherits all the properties of the AeccSettingsRoot class from which it is derived. Ambient settings allow you to get and set the units and default property settings of survey objects. This is done through the AeccSurveySettingsRoot.SurveySettings, which contains a standard AeccSettingsAmbient object.