Many to one relationship with the MapCat table. Contains one record for EACH different theme represented on the image.
| Field Name | Field Description | Data Type | Field Size* | MapID | The map or image ID, foreign key to table MapCat | int | 4 | ThemeID | The theme ID, foreign key to table Theme | smallint | 2 |
*The text datatype pre-allocates only 16 bytes. Size represents actual bytes for all other data types.