Tilestache返回空的geojson

Question

我已经成功安装了tilestache。我还使用here中的shapefile成功添加了一个图层。但是当我尝试使用my own shapefile时，服务器总是返回空的featurecollection。我尝试在查询中添加ST_Transform()但仍返回空功能。

我的配置文件：

{
  "cache":
  {
    "name": "Test",
    "path": "/tmp/stache",
    "umask": "0000"
  },
  "layers":
  {
        "osm-processed_p1": {
            "allowed origin": "*",
            "provider": {
                "class": "TileStache.Goodies.VecTiles:Provider",
                "kwargs": {
                    "dbinfo": {
                        "host": "127.0.0.1",
                        "user": "postgres",
                        "database": "ts_data"
                    },
                    "queries": [
                        "SELECT gid, geom AS __geometry__ FROM osm.kalimantan"
                    ]
                }
            }
        }
  }
}

我该如何解决这个问题？