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README.md

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     sequence: string
   - name: question_type
     sequence: string
-  splits:
-  - name: train
-    num_bytes: 12919306
-    num_examples: 7536
-  - name: validation
-    num_bytes: 2557027
-    num_examples: 1500
-  - name: test
-    num_bytes: 2568380
-    num_examples: 1500
-  download_size: 4096
-  dataset_size: 18044713
 ---
+
+# 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).

data/train/images/train.json

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