---
license: apache-2.0
library_name: ultralytics
pipeline_tag: object-detection
tags:
- yolo
- yolo11
- object-detection
- blueprint
- floorplan
- architecture
- construction
- legend
- document-layout
- cad
---

# GreenMap/yolo11x-blueprint-legend-detector

![157](https://cdn-uploads.huggingface.co/production/uploads/689a00a12b3976126e5e8431/_HXzcYTKM6PsrvqRZswk5.jpeg)

## Overview

YOLO11x model trained to detect structural elements inside blueprint legends on architectural and construction drawings.

- Detects legend symbols (hatch patterns and graphical symbols).
- Detects legend descriptions.
- Detects complete legend rows.
- Detects legend continuation blocks.
- Trained on architectural floor plans and construction drawings.

## Classes

| ID | Class | Purpose |
|----|---------------------------|---------------------------------------------------------------|
| 0 | legend_symbol | Graphical symbol or hatch pattern representing a construction element or material. |
| 1 | legend_description | Text description corresponding to a legend symbol. |
| 2 | legend_row | Complete legend entry containing a symbol and its associated description. |
| 3 | legend_continuation_block | A block containing the continuous legend elements. |

## Training Metrics

![results](https://cdn-uploads.huggingface.co/production/uploads/689a00a12b3976126e5e8431/CaxJzpe8pOrPtM8u3Wa1E.png)

## Validation Metrics

| Class | Images | Instances | Precision | Recall | mAP50 | mAP50-95 |
|-------|--------|-----------|-----------|--------|-------|----------|
| all | 68 | 2821 | 0.912 | 0.903 | 0.918 | 0.735 |
| legend_symbol | 68 | 907 | 0.982 | 0.986 | 0.993 | 0.890 |
| legend_description | 68 | 956 | 0.977 | 0.984 | 0.993 | 0.831 |
| legend_row | 68 | 901 | 0.962 | 0.984 | 0.990 | 0.799 |
| continuous_elements_block | 41 | 57 | 0.727 | 0.655 | 0.696 | 0.421 |

## Training

- Base model: YOLO11x
- Task: Object Detection
- Input size: 1472 × 1472
- Framework: Ultralytics YOLO