Update README.md

README.md

@@ -15,6 +15,15 @@ tags:
 > **Total Size:** Approximately **5-6 TB**.  
 > **Status:** ⏳ **Uploading...** (The dataset is currently being synchronized to the cloud drives. Some links may become available shortly.)
 
+### Trajectory Card
+
+* **Ref-Query Pairs**: Each sub-dataset includes a **Reference** (clear weather) and a **Query** (with weather effects) trajectory following the exact same path.
+* **Data Modalities**: Sequential frames are provided as `*_0.png` for **RGB** and `*_1.png` for **Metric Depth**.
+* **Data Access**: 
+    * **Images**: Download from the **cloud drive** links in the README.
+    * **Poses & Cameras**: Download directly from this **repository**.
+* **Note**: Please download the reprojection code from this repo and run the **demo** first to verify the projection alignment and coordinate system.
+
 | Trajectory Name | Location (City, Country) | Lat / Lng | Height | Pitch Range | 🔴 Baidu Netdisk | 🔵 Google Drive |
 | :--- | :--- | :--- | :--- | :--- | :--- | :--- |
 | England_seq1@200@30_50 | Oxford, UK | 51.7345 / -1.2715 | 200m | [30, 50] | [Link](https://pan.baidu.com/s/19jVWKwyiqMw-7yYbaD3AEA?pwd=saww) | [Link](https://drive.google.com/file/d/1PXPqSHqLoU99Rhqx4lQiZWZYB_YOityj/view?usp=sharing) |