| Value | Meaning |
|---|---|
| OFSTNone0 | No subtype. This is the default value |
| OFSTBoolean1 | Boolean integer. Only valid for OFTInteger and OFTIntegerList. |
| OFSTInt162 | Signed 16-bit integer. Only valid for OFTInteger and OFTIntegerList. |
| OFSTFloat323 | Single precision (32 bit) floating point. Only valid for OFTReal and OFTRealList. |
| OFSTMaxSubType3 |
List of field subtypes. A subtype represents a hint, a restriction of the main type, that is not strictly necessary to consult. This list is likely to be extended in the future ... avoid coding applications based on the assumption that all field types can be known. Most subtypes only make sense for a restricted set of main types. @since GDAL 2.0