# 计算几何
================================================================================

## 参数

+-------------+--------+----------+----------------------------------------------------------------------------------------------------------------------+
| 名称        | 类型   | 是否必传 | 备注                                                                                                                 |
+-------------+--------+----------+----------------------------------------------------------------------------------------------------------------------+
| host        | string | Y        | postgre的ip路径                                                                                                      |
+-------------+--------+----------+----------------------------------------------------------------------------------------------------------------------+
| database    | string | Y        | 数据库名称                                                                                                           |
+-------------+--------+----------+----------------------------------------------------------------------------------------------------------------------+
| user        | string | Y        | 用户名                                                                                                               |
+-------------+--------+----------+----------------------------------------------------------------------------------------------------------------------+
| password    | string | Y        | 密码                                                                                                                 |
+-------------+--------+----------+----------------------------------------------------------------------------------------------------------------------+
| port        | string | Y        | 端口                                                                                                                 |
+-------------+--------+----------+----------------------------------------------------------------------------------------------------------------------+
| fieldName   | string | Y        | 字段名称                                                                                                             |
+-------------+--------+----------+----------------------------------------------------------------------------------------------------------------------+
| fieldType   | string | Y        | 字段类型                                                                                                             |
+-------------+--------+----------+----------------------------------------------------------------------------------------------------------------------+
| dataTable01 | string | Y        | 输入表一的名称                                                                                                       |
+-------------+--------+----------+----------------------------------------------------------------------------------------------------------------------+
| property    | string | Y        | 所求的几何属性，目前只做了计算面积功能，后续补充其他几何属性；并且前端需要判断数据源的坐标为投影坐标才能进行面积计算 |
+-------------+--------+----------+----------------------------------------------------------------------------------------------------------------------+
| outputTable | string | Y        | 输出结果的表名                                                                                                       |
+-------------+--------+----------+----------------------------------------------------------------------------------------------------------------------+
| unit        | string | Y        | 计算单位                                                                                                             |
+-------------+--------+----------+----------------------------------------------------------------------------------------------------------------------+
| defRunner   | string | Y        | 执行引擎                                                                                                             |
+-------------+--------+----------+----------------------------------------------------------------------------------------------------------------------+


## 返回

+--------+------+----------+---------------------------------------------------------+
| 名称   | 类型 | 是否必传 | 备注                                                    |
+--------+------+----------+---------------------------------------------------------+
| result | Row  | Y        | 所有相交要素的连接字段、要素WKT以及相关的要素长度、面积 |
+--------+------+----------+---------------------------------------------------------+

## 算法入口及参数

+----------+-------------------+-----------------+
| 名称     | 示例              | 备注            |
+----------+-------------------+-----------------+
| args[0]  | localhost         | postgre的ip路径 |
+----------+-------------------+-----------------+
| args[1]  | 5432              | 端口            |
+----------+-------------------+-----------------+
| args[2]  | postgis_25_sample | 数据库名称      |
+----------+-------------------+-----------------+
| args[3]  | postgres          | 用户名          |
+----------+-------------------+-----------------+
| args[4]  | kiwi              | 密码            |
+----------+-------------------+-----------------+
| args[5]  | area              | 字段名称        |
+----------+-------------------+-----------------+
| args[6]  | double            | 字段类型        |
+----------+-------------------+-----------------+
| args[7]  | land2018          | 输入表一的名称  |
+----------+-------------------+-----------------+
| args[8]  | area              | 所求的几何属性  |
+----------+-------------------+-----------------+
| args[9]  | test              | 输出结果的表名  |
+----------+-------------------+-----------------+
| args[10] | Square Kilometer  | 计算单位        |
+----------+-------------------+-----------------+
| args[11] | SparkRunner       | 执行引擎        |
+----------+-------------------+-----------------+