{
  "id": 326120,
  "title": "Baseline position data miss in some drive",
  "url": "/competitions/smartphone-decimeter-2022/discussion/326120",
  "author_name": "",
  "post_date": "2022-05-20T09:54:36.625189700Z",
  "votes": 3,
  "comment_count": 3,
  "views": 0,
  "content": "<p>When I visualize the baseline position and ground truth position, I find that some sections of position in baseline data {2020-07-08-US-MTV-2/GooglePixel4XL, 2020-07-08-US-MTV-2/GooglePixel4} are missing as follows<br>\n<img src=\"https://img-blog.csdnimg.cn/4b6ce8c939094078aef05030ab13034b.png#pic_center\" alt=\"\"></p>\n<p>so the precision is very bad</p>",
  "messages": [
    {
      "id": "1795954",
      "postDate": "05/20/2022 09:54:36",
      "content": "<p>When I visualize the baseline position and ground truth position, I find that some sections of position in baseline data {2020-07-08-US-MTV-2/GooglePixel4XL, 2020-07-08-US-MTV-2/GooglePixel4} are missing as follows<br>\n<img src=\"https://img-blog.csdnimg.cn/4b6ce8c939094078aef05030ab13034b.png#pic_center\" alt=\"\"></p>\n<p>so the precision is very bad</p>",
      "rawMarkdown": "When I visualize the baseline position and ground truth position, I find that some sections of position in baseline data {2020-07-08-US-MTV-2/GooglePixel4XL, 2020-07-08-US-MTV-2/GooglePixel4} are missing as follows\n![](https://img-blog.csdnimg.cn/4b6ce8c939094078aef05030ab13034b.png#pic_center)\n\nso the precision is very bad",
      "votes": null
    },
    {
      "id": "1833418",
      "postDate": "06/26/2022 02:14:32",
      "content": "<p>I noticed it too. The red in the diagram is ground_truth and the blue is baseline. Do we need to take these data into account as well?<img src=\"https://www.googleapis.com/download/storage/v1/b/kaggle-forum-message-attachments/o/inbox%2F8234844%2Ffcca73bd6b9d69afca8cdffd2ac9fe81%2Ftest.png?generation=1656209565164228&amp;alt=media\" alt=\"\"></p>",
      "rawMarkdown": "I noticed it too. The red in the diagram is ground_truth and the blue is baseline. Do we need to take these data into account as well?![](https://www.googleapis.com/download/storage/v1/b/kaggle-forum-message-attachments/o/inbox%2F8234844%2Ffcca73bd6b9d69afca8cdffd2ac9fe81%2Ftest.png?generation=1656209565164228&alt=media)",
      "votes": null
    },
    {
      "id": "1833453",
      "postDate": "06/26/2022 03:07:17",
      "content": "<p>Looking directly at device_gnss.cvs, it seems that there is sometimes data with missing GNSS signals.<br>\nThis example is extreme. Since this can happen even in normal cases, it seems that a correction for data with missing GNSS signals is necessary.</p>",
      "rawMarkdown": "Looking directly at device_gnss.cvs, it seems that there is sometimes data with missing GNSS signals.\nThis example is extreme. Since this can happen even in normal cases, it seems that a correction for data with missing GNSS signals is necessary.",
      "votes": null
    },
    {
      "id": "1833883",
      "postDate": "06/26/2022 12:22:29",
      "content": "<p>Interesting. I don't know the area, but from playing with Google Maps, the \"Ground Truth\" appears to go offroad through the Alexza Pharmaceuticals site (I don't think the straight line path shown is feasible for a vehicle). There's a Google campus next door, by the way.</p>",
      "rawMarkdown": "Interesting. I don't know the area, but from playing with Google Maps, the \"Ground Truth\" appears to go offroad through the Alexza Pharmaceuticals site (I don't think the straight line path shown is feasible for a vehicle). There's a Google campus next door, by the way.",
      "votes": null
    }
  ],
  "comments": [
    {
      "id": 1833418,
      "author_name": "minfuka",
      "author_url": "",
      "post_date": "06/26/2022 02:14:32",
      "content": "<p>I noticed it too. The red in the diagram is ground_truth and the blue is baseline. Do we need to take these data into account as well?<img src=\"https://www.googleapis.com/download/storage/v1/b/kaggle-forum-message-attachments/o/inbox%2F8234844%2Ffcca73bd6b9d69afca8cdffd2ac9fe81%2Ftest.png?generation=1656209565164228&amp;alt=media\" alt=\"\"></p>",
      "votes": null,
      "replies": [
        {
          "id": 1833453,
          "author_name": "minfuka",
          "author_url": "",
          "post_date": "06/26/2022 03:07:17",
          "content": "<p>Looking directly at device_gnss.cvs, it seems that there is sometimes data with missing GNSS signals.<br>\nThis example is extreme. Since this can happen even in normal cases, it seems that a correction for data with missing GNSS signals is necessary.</p>",
          "votes": null,
          "replies": []
        },
        {
          "id": 1833883,
          "author_name": "jbomitchell",
          "author_url": "",
          "post_date": "06/26/2022 12:22:29",
          "content": "<p>Interesting. I don't know the area, but from playing with Google Maps, the \"Ground Truth\" appears to go offroad through the Alexza Pharmaceuticals site (I don't think the straight line path shown is feasible for a vehicle). There's a Google campus next door, by the way.</p>",
          "votes": null,
          "replies": []
        }
      ]
    }
  ],
  "raw_markdown_by_id": {
    "1795954": "When I visualize the baseline position and ground truth position, I find that some sections of position in baseline data {2020-07-08-US-MTV-2/GooglePixel4XL, 2020-07-08-US-MTV-2/GooglePixel4} are missing as follows\n![](https://img-blog.csdnimg.cn/4b6ce8c939094078aef05030ab13034b.png#pic_center)\n\nso the precision is very bad",
    "1833418": "I noticed it too. The red in the diagram is ground_truth and the blue is baseline. Do we need to take these data into account as well?![](https://www.googleapis.com/download/storage/v1/b/kaggle-forum-message-attachments/o/inbox%2F8234844%2Ffcca73bd6b9d69afca8cdffd2ac9fe81%2Ftest.png?generation=1656209565164228&alt=media)",
    "1833453": "Looking directly at device_gnss.cvs, it seems that there is sometimes data with missing GNSS signals.\nThis example is extreme. Since this can happen even in normal cases, it seems that a correction for data with missing GNSS signals is necessary.",
    "1833883": "Interesting. I don't know the area, but from playing with Google Maps, the \"Ground Truth\" appears to go offroad through the Alexza Pharmaceuticals site (I don't think the straight line path shown is feasible for a vehicle). There's a Google campus next door, by the way."
  },
  "source": "meta"
}