# readers.pgpointcloud

The PostgreSQL Pointcloud Reader allows you to read from a PostgreSQL database that the PostgreSQL Pointcloud extension enabled. The Pointcloud extension stores point cloud data in tables that contain rows of patches. Each patch in turn contains a large number of spatially nearby points.

The reader pulls patches from a table, potentially sub-setting the query on the way with a “where” clause.

Dynamic Plugin

This stage requires a dynamic plugin to operate

## Example

    {
      "pipeline":[
        {
          "type":"readers.pgpointcloud",
          "connection":"dbname='lidar' user='user'",
          "table":"lidar",
          "column":"pa",
          "spatialreference":"EPSG:26910",
          "where":"PC_Intersects(pa, ST_MakeEnvelope(560037.36, 5114846.45, 562667.31, 5118943.24, 26910))",
        },
        {
          "type":"writers.text",
          "filename":"output.txt"
        }
      ]
    }

## Options

connection
  PostgreSQL connection string. In the form “host=hostname dbname=database user=username password=pw port=5432” [Required]
table
  Database table to read from. [Required]
schema
  Database schema to read from. [Default: public]
column
  Table column to read patches from. [Default: pa]
spatialreference
  Sets the spatial reference for the point data. Overrides any spatial reference information read from the database. Most text-based formats of SRS information are accepted, including WKT and proj.4.
count
  Maximum number of points to read [Optional]