An AI-guided framework for automated map point symbol generation through template rendering

Generative artificial intelligence (AI) holds significant promise for cartography, but its application is hindered by a fundamental tension between creative freedom and rule-based design. This study addresses this challenge by proposing and evaluating a model-agnostic “template-render” framework that decouples conceptual design (“template”) from visual synthesis (“render”), creating a more controllable workflow. We implement this with a two-step approach: a Large Language Model (LLM) generates a structured symbol description, which a Text-to-Image (T2I) model then renders. Our baseline evaluation demonstrates that while the unguided approach is technically feasible, its outputs are often cartographically unsuitable. We then show that by introducing a knowledge-guided prompt to the template stage, the quality, clarity, and fitness of the symbols are significantly improved. We further present the Map Symbol Agent (MSA), a prototype that automates this pipeline. Our work validates the effectiveness of this framework, while also systematically identifying critical future challenges, such as ensuring stylistic consistency and mitigating model biases. This study serves as a crucial exploratory step, charting a promising path and defining a research agenda for developing more controllable generative systems in specialized domains.