An SVG is not an image, it is a graphics-document. A graphics-document is a type of document in which the visual appearance or layout of content conveys meaning.
Accessible forms are easy to understand, complete, and submit. Instructions, cues, required form fields, and field formatting requirements must be clearly identified to users. Error recovery must be intuitive and descriptive.
The grouping and labeling of thematically related controls within a form is an important aspect of providing semantic information so users can understand and complete a form successfully.