Format

SDO_GCDR.ELOC_DRIVE_DISTANCE_POLYGON(
  start_address           IN  VARCHAR2,    
  country                 IN  VARCHAR2,
  cost                    IN  NUMBER,
  cost_unit               IN  VARCHAR2,
  vehicle_type            IN  VARCHAR2,    
  print_request_response  IN  VARCHAR2 DEFAULT 'FALSE'
) RETURN SDO_GEOMETRY;

or

SDO_GCDR.ELOC_DRIVE_DISTANCE_POLYGON(
  longitude               IN  NUMBER,
  latitude                IN  NUMBER,    
  cost                    IN  NUMBER,
  cost_unit               IN  VARCHAR2,
  vehicle_type            IN  VARCHAR2,    
  print_request_response  IN  VARCHAR2 DEFAULT 'FALSE'
) RETURN SDO_GEOMETRY;

Description

Computes the drive distance polygon around an input location for the specified distance cost, and returns the geometry of the polygon in SDO_GEOMETRY format.

The input location can either be a single-line address or be specified as longitude and latitude.

Parameters

start_address

Complete start address (not formatted into separate fields).

country

ISO 2-character country code. See Country codes in ISO Online Browsing Platform (OBP) to view the list of supported codes.

longitude

Longitude value of the starting point.

latitude

Latitude value of the starting point.

cost

Drive distance to use for the area of reachability from the starting point.

The output polygon is the area reachable from the start point within the specified distance.

cost_unit

Unit for cost.

Supported values are: mile, kilometer, Km, and meter.

vehicle_type

Type of vehicle considered for computing the distance.

Supported values are: auto and truck

print_request_response

Determines if the request sent and response received are to be printed.

By default, the parameter value is 'FALSE'.

Usage Notes

In order to use this function on your Autonomous Database instance, ensure that you have been granted the required permission. See SDO_GCDR.ELOC_GRANT_ACCESS for more information.

The SDO_GCDR.ELOC_DRIVE_DISTANCE_POLYGON function can accept one of the following sets of input parameters to compute the drive distance polygon (as a geometry) around the specified location:

• Using an unformatted address: Provide the start_address parameter where the complete address is stored in a single field (that is, unformatted).
• Using geographic coordinates: Provide the longitude and latitude parameters to determine the location.

Also, note that each parameter input can be a column from a table or view, or an explicit string or number value.

Example

The following example computes the drive distance polygon around a location specified using longitude and latitude for a truck:

SELECT SDO_GCDR.ELOC_DRIVE_DISTANCE_POLYGON(-71.47374, 42.75505, 500, ‘meter', 'truck') polygon FROM DUAL;

POLYGON(SDO_GTYPE, SDO_SRID, SDO_POINT(X, Y, Z), SDO_ELEM_INFO, SDO_ORDINATES)
------------------------------------------------------------------------------------------
SDO_GEOMETRY(2003, 4326, NULL, SDO_ELEM_INFO_ARRAY(1, 1003, 1), SDO_ORDINATE_ARRAY(-71.47863,42.75343
-71.47793,42.75366 -71.47776,42.75372 -71.47763,42.75376 -71.47515,42.75458 -71.47316,42.75412 -71.47298,
42.75301 -71.47144,42.75279 -71.47056,42.75388 -71.47142,42.75415 -71.47282,42.75423 -71.47348,
42.75578 -71.47313,42.75671 -71.4738,42.75625 -71.47423,42.75609 -71.47478,42.75597 -71.47627,
42.75619 -71.4773,42.75562 -71.47819,42.75549 -71.47863,42.75343))