Android的ExifInterface TAG_GPS_LATITUDE DENOM值 [英] Android ExifInterface TAG_GPS_LATITUDE denom values
问题描述
我试图使用地理标记用我自己的相机应用。什么我做的是让我的当前地理位置为十进制值（例：纬度= 6.8447375），并希望将其转换中的要想在 ExifInterface 使用公共静态最后弦乐TAG_GPS_LATITUDE 字段DMS格式。按照 Android文档我需要给分母（如文档denom1，denom2，denom3）什么是我要使用那些分母正确的价值观？有没有计算那些分母的标准方法。当我使用denom1 = 1，denom2 = 1和denom3 = 1000，我得到我的附近的实际位置不同的位置。我怎样才能提高准确率？
I am trying to use geo-tagging with my own camera application. What I am doing is getting my current geo-location as decimal value (Ex. Latitude = 6.8447375) and want to convert it in to DMS format in order to use public static final String TAG_GPS_LATITUDE field in the ExifInterface. According to the Android documentation I need to give denominators (as in documentation denom1, denom2, denom3 ) What are the correct values that I have to use for those denominators? Is there any standard method to calculate those denominators. When I use denom1=1, denom2=1 and denom3=1000 I get different location near my actual location. How can I increase the accuracy ?
推荐答案
您提供正确的价值观分子一起去那些分母？
Are you providing the correct numerator values to go with those denominators?
NUM1 / denom1 =度
num1/denom1 = degrees
NUM2 / denom2 =分钟
num2/denom2 = minutes
NUM3 / denom3 =秒。
num3/denom3 = seconds
我目睹了大多数摄像机连接code为分母的值1,1,1000。
I've witnessed most cameras encode the values 1,1,1000 for the denominators.
让我们用你的样品值，并将其转换成精确的合理值：
Let's use your sample value and convert it into accurate rational values:
6.8447375度
下面的步骤是：
1）取角的整个部分
NUM1 = 6 / denom1 = 1 - > 6度
num1 = 6 / denom1 = 1 --> 6 degrees
2）乘以60的小数部分，然后利用这一整体的一部分：
0.8447375 * 60 = 50.68425
2) Multiply the fractional part by 60 and then take the whole part of that: 0.8447375 * 60 = 50.68425
NUM2 = 50 / denom2 = 1 - > 50分
num2 = 50 / denom2 = 1 --> 50 minutes
3）每度×1000）
3) Subtract 6 deg 50' (6.833333333) from your original value = 0.0114041667, then multiply by 3600000 (3600 seconds per degree x 1000)
NUM3 = 41055 / denom3 = 1000 - >41.055秒
num3 = 41055 / denom3 = 1000 -> 41.055 seconds
您现在的位置是EN codeD为6度，50'41.055
Your position is now encoded as 6 deg, 50' 41.055"
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