This feature class is used to portray suface landforms that occupy sufficienct area to be mapped. This feature class excludes geomorphic surfaces that are handled by Surface_poly. Landform features that are too small to map as polygons can be recorded in Feature_point or Feature_line. Unless a need arises, boundaries of these polygons will not be stored as a separate feature class. Line symbology for features like sinkholes can be applied to the polygon boundaries as needed.
| Field Name | Field Alias | Length (text fields) |
Field Type | Field Value | Default | Allow Nulls? | Attributes / Examples | Description / Notes |
|---|---|---|---|---|---|---|---|---|
| FGDC_code | " | 16 | String | variable | [null] | TRUE | 30.3.12 | FGDC geologic symbol reference number. |
| FeatureID | " | 50 | String | variable | [null] | TRUE | Moraine-1 | basis of possible relate to Feature_point or Feature_line |
| Name | " | 50 | String | variable | [null] | TRUE | White Sands | |
| LndfmClass | LandformClass | 50 | String | variable | [null] | TRUE | erosional, constructional | |
| LndfmMorph | LandformMorphology | 50 | String | CVD | [null] | TRUE | moraine, dune, rock glacier, playa, sinkhole, etc. | |
| Confidence | " | 16 | String | CVD | [null] | TRUE | unspecified, certain, probable, uncertain | confidence regarding feature level ID |
| Age | " | 128 | String | variable | [null] | TRUE | e.g. Pliocene | |
| AgeBasis | " | 255 | String | CVD | [null] | TRUE | soils, geochron, etc | |
| IsoDateID | IsotopicDateID | 50 | String | variable | [null] | TRUE | sample info/link to best date data | links to Geochron data |
| SourceID | " | 128 | String | variable | [null] | unknown; unspecified; Smith, 2006b [variable] | Feature level metadata (who mapped this); related to bibliographic detail | |
| Descriptn | Description | 255 | String | variable | [null] | TRUE | Landform description | Description of this particular landform. |