README.md

---
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  config_name: v1.5
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  - name: images
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  - name: question
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  - name: options
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  - name: answer
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---

# Official MapLM-v1.5 Dataset Release for "MAPLM: A Real-World Large-Scale Vision-Language Benchmark for Map and Traffic Scene Understanding"

## Dataset Access

Due to the large size of the dataset and limitations with the Hugging Face Datasets library, the training set is not uploaded directly here. However, it can be downloaded from [this link](https://purdue0-my.sharepoint.com/:u:/g/personal/yunsheng_purdue_edu/Ee4a-FKaqh1Cq-bNW49zKq0BM8XOquOAkPFvxYiis89OTg?e=28gDyC).

Additionally, we provide a custom data loader based on the Hugging Face Datasets library, available in the `maplm_v1_5.py` file.

## Challenge Overview

The MAPLM-QA Challenge Track is based on a subset of the MAPLM dataset, specifically designed for Visual Question Answering (VQA) in the context of traffic scene understanding. Participants are invited to develop innovative methods to accurately answer multiple-choice questions about complex traffic scenes, using high-resolution panoramic images and 2.5D bird’s-eye view (BEV) representations. Top-performing teams will be recognized with certificates and honorariums.

## Evaluation

To evaluate different VQA baselines for the MAPLM-QA task, we have categorized the question-answer pairs into two types: Open QA and Fine-grained QA. The challenge will focus on Fine-grained QA questions, which are treated as a multi-class classification problem with multiple options. These will be evaluated using the correct ratio as the accuracy metric, covering four categories: LAN, INT, QLT, and SCN.

In addition to evaluating individual items, we employ two overall metrics:

- **Frame-Overall Accuracy (FRM):** This metric is set to 1 if all Fine-grained QA questions are answered correctly for a given frame; otherwise, it is 0.
- **Question-Overall Accuracy (QNS):** This metric is the average correct ratio across all questions.

For more details, please refer to the [MAPLM paper](https://openaccess.thecvf.com/content/CVPR2024/papers/Cao_MAPLM_A_Real-World_Large-Scale_Vision-Language_Benchmark_for_Map_and_Traffic_CVPR_2024_paper.pdf).