retattribs trkattribs wptattribs分别是什么意思?
对测绘不是很了解,大概看了下,应该是个意思
retattribs应该是属性为RET格式的文件;
trkattribs 应该是属性为TRK格式的文件;
wptattribs应该是属性为WPT格式的文件;
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