lon

基本解释

I am storing the lat/lon values as tdouble fields.
我将纬度/经度值存储为 tdouble 字段。
The lat and lon parameters, which specify geographical filters for search results
lat 和 lon 参数，它们指定搜索结果的地理筛选条件
Thus, it may be worthwhile to convert your lat/lon values to radians during indexing instead of having to convert them over and over during search time.
因此在建立索引时将纬度/经度值转换成弧度是值得的，从而避免在每次搜索都执行转换。

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