Google bigquery 正在上载到BigQuery GIS:“；无效嵌套：循环1不应包含循环0；

我正在将CSV文件上载到BigQuery GIS，但由于“无效嵌套：循环1不应包含循环0”而失败

这是完整的错误：

Upload complete.
BigQuery error in load operation: Error processing job 'mytable-1176:bqjob_rc625a5098ae5fb_0000017289ff6c01_1': Error while reading data,
error message: CSV table encountered too many errors, giving up. Rows: 1; errors: 1. Please look into the errors[] collection for more details.
Failure details:
- Error while reading data, error message: Could not parse 'POLYGON
((-0.02679766923455 51.8338973454281,-0.02665013926462
51.83390841216...' as geography for field geom (position 0)
starting at location 23 Invalid nesting: loop 1 should not contain
loop 0

我已在下面完整粘贴了CSV文件中有问题的行。它似乎是有效的WKT（或者无论如何，如果我在Postgres或BigQuery中选择ST_GeomFromText（..），我不会得到错误

我可以上传CSV文件的其他行，所以这不是模式等的问题

我的CSV文件全文：

"POLYGON ((-0.02679766923455 51.8338973454281,-0.02665013926462 51.8339084121668,-0.026560668613456 51.8339151296535,-0.026487799104821 51.8339205969954,-0.026347243837181 51.8339311509483,-0.026281189190482 51.8339361120738,-0.026195955952021 51.8339425137374,-0.026119198116154 51.8339482752767,-0.026003486068282 51.8339569617883,-0.025952488850356 51.8339607906816,-0.025861270469634 51.8339676401587,-0.025858880441179 51.833967860811,-0.025828348676774 51.8339706933666,-0.025711206268708 51.8339815496773,-0.025689593686264 51.8339835517849,-0.025640538635981 51.8339884382609,-0.025529205899202 51.8339995358046,-0.025488766227802 51.8340035687339,-0.02540224517472 51.8340121962521,-0.025345346891212 51.8340178681142,-0.025335200706554 51.8340188757231,-0.025340349282672 51.834037216355,-0.025358081339574 51.8341162858309,-0.02530239219927 51.8342041307738,-0.025137161521987 51.8344648008,-0.025126602922354 51.8344835251042,-0.025117917332667 51.8344989177765,-0.025112142226516 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这会是一个复杂的订单问题吗

---

作为参考，我的源数据是一个EPSG:27700形状文件，我使用

ogr2ogr

将其转换为EPSG:4326 WKT CSV。这是多边形方向的问题，有关详细信息，请参阅：

加载WKT地理数据时，BigQuery假设多边形的方向如上面链接中所述（以允许加载大于半球的多边形）

ST_GeogFromText

具有不同的默认值，这允许它使用此数据。如果将第二个参数

oriented=>TRUE

传递给

ST_GeogFromText

函数，则会得到相同的结果

解决方法是将数据加载为

字符串

，然后使用

ST_GeogFromText

转换为地理信息，或者使用GeoJSON格式而不是WKT加载。GeoJSON是平面地图格式，因此没有多边形方向的模糊性

您可以让ogr2ogr使用GeoJSON生成CSV，方法如下

ogr2ogr -f csv -dialect sqlite \
  -sql "select AsGeoJSON(ST_Transform(geometry, 4326)) geom, * from shp" 
  out.csv ./input/

另见