可以从图片中获取图片GPS位置坐标吗? [英] Is possible to get Image GPS location coordinates from the Image?

问题描述

我正在构建Flutter应用程序，用户可以在其中发布照片及其位置.使用者都可以从相机或图库中获取图片.

I'm building a Flutter App where the user can post a photo and it's location. The use can both get a picture from the camera or from the library.

如果用户使用相机拍照，则可以使用设备的GPS位置来设置图片的位置.我正在尝试根据图片的元数据获取图片的GSP位置，但是我还没有找到一种方法.

If the user take a picture from camera I can use the GPS location of the device to set the picture's location. I'm trying to get the GSP location of the pictures based on its metadata, but, I didn't found a way to do it yet.

有可能做到吗?最好的方法如何?

Is possible to do it? How the best way?

我在问题中输入"GPS"以使其清楚.我试图发现拍摄照片的实际位置.我还向问题中添加了"Flutter"，以表明我正面临在Flutter App中解决此问题的问题.

I put "GPS" in the question to make it clear. I'm trying to discover the physical position where the picture was taken. I also added "Flutter" to the question to make it clear that I'm facing the problem of solving this problem in a Flutter App.

推荐答案

如果图像是JPEG或RAW图像文件，则地理位置元数据将存储为Exif标记.在Android中，这是通过ExifInterface类完成的.

The geolocation metadata is stored as Exif tags provided the image is a JPEG or a RAW image file. In Android this is done through the ExifInterface class.

标记为TAG_GPS_LATITUDE和TAG_GPS_LONGITUDE: https://developer.android.com/reference/android/media/ExifInterface. html

请注意，坐标必须以有理格式表示:度，分钟和秒，以dd/1,mm/1,ss/1表示.

Please note the coordinates need to be expressed in the rational format: degrees, minutes and seconds, as dd/1,mm/1,ss/1.

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