Table 1.
Annotation categories.
| Categories | Subcategories |
|---|---|
| Technology | Pencil, Roller, Pen, Pressure scratch, chalk, Stencil, Spray can, Other |
| Carrier medium | Trailer, Vending machine, Railway line, Tree/Plant, Ground, Mailbox, Bridge, Bus, Container, Downpipe, Window/Blind, Railing/Handrail, Closed interior, Freight train, Hall of Fame, Stop noise barrier, Truck, Mast, Waste/Disposal container, Park bench, Passenger train, Car, Column/Pillar/Support, Display, Case Sign, Play/Sports equipment, Sticker, Road salt container, Electricity/Distribution box, Telephone box, Gate, Stairs, Door, Subway/S-Bahn Subway/S-Bahn/Passenger train - inside underpass, Wall Fence, Other, Undefined |
| Surface | Asphalt, Concrete, Glass, Wood, Ceramics, Plastic, Metal, Natural stone, Paper/Cardboard, Plaster, Exposed, Aggregate, Concrete Brick, Other, Undefined |
| Type | Character, Comment, Co-Construction, Composition, Piece/Writing/Style, Sketch, Saying/Concept call, Stencil, Tag(s), Throw Up, Otherwise |
| Subject area | Drugs, Erotic, Film, Peace, Football, Sports, Violence, Culture Art, Love, Music, Politics, Police, Racism, Religion, School, Death, Environment, Behavioural standard, Economy, Other, None |