标识(结果输出数据为0)
=============================

1.描述
------------

计算输入要素和标识要素的几何交集。与标识要素重叠的输入要素或输入要素的一部分将获得这些标识要素的属性

2.使用限制
----------------

3.算子id
----------------
igis.gis.analysis.overlay.identity

4.参数列表
---------------

+----------+-------------------+------------------+--------+----------------------------------------------------------------------------------------------------------------------------------+----------+
| 参数类型 | 参数名称          | 参数关键字       | 必要性 | 参数说明                                                                                                                         | 数据类型 |
+----------+-------------------+------------------+--------+----------------------------------------------------------------------------------------------------------------------------------+----------+
| 输入参数 | url               | 数据源地址       | Y      | 数据源地址                                                                                                                       | String   |
+----------+-------------------+------------------+--------+----------------------------------------------------------------------------------------------------------------------------------+----------+
|          | in_features       | 输入要素类或图层 | Y      | 输入要素类或图层                                                                                                                 | String   |
+----------+-------------------+------------------+--------+----------------------------------------------------------------------------------------------------------------------------------+----------+
|          | identity_features | 标识要素类或图层 | Y      | 标识要素类或图层                                                                                                                 | String   |
+----------+-------------------+------------------+--------+----------------------------------------------------------------------------------------------------------------------------------+----------+
|          | join_attributes   | 连接属性         | N      | 确定哪些属性将传递到输出要素类中                                                                                                 | String   |
+----------+-------------------+------------------+--------+----------------------------------------------------------------------------------------------------------------------------------+----------+
|          | cluster_tolerance | 容差             | N      | 所有要素坐标（节点和折点）之间的最小距离以及坐标可以沿 X 和/或 Y 方向移动的距离                                                  | Double   |
+----------+-------------------+------------------+--------+----------------------------------------------------------------------------------------------------------------------------------+----------+
|          | relationship      | 是否输出附加关系 | N      | 确定是否要将 in_features 和 identity_features 之间的附加空间关系写入到输出。仅当 in_features 为线而 identity_features 为面时适用 | Boolean  |
+----------+-------------------+------------------+--------+----------------------------------------------------------------------------------------------------------------------------------+----------+
| 输出参数 | out_feature_class | 结果图层         | Y      | 所创建的要素类，并且结果将写入其中。                                                                                             | String   |
+----------+-------------------+------------------+--------+----------------------------------------------------------------------------------------------------------------------------------+----------+


5.配置面板
--------------------

.. image:: ../../../_static/images/identity_panel.jpg
   :width: 300px

6.调用示例
------------------
.. code::
    
    {
      "params": {
        "url":"kudu://172.20.20.15:7051/geomesa_spark",
        "in_features":"hainan",
        "identity_feature":"erase",
        "join_attributes"："ALL",
        "cluster_tolerance":"0.001",
        "out_feature_class":"hainan_identity"
      },
      "identifier":"igis.gis.analysis.overlay.identity"
    }