CreatePoint gem

SQL WarehouseProphecyDatabricksSqlSpatial 0.0.1+

Use the CreatePoint gem to convert longitude and latitude coordinates into geographic points.

Input and Output

The CreatePoint gem accepts the following input and output.

Port	Description
in0	Source dataset containing pairs of columns with longitude and latitude coordinates.
out	Output dataset containing one or more new columns with points in Well-known Text (WKT) geometric format.

Parameters

The CreatePoint gem accepts longitude and latitude columns as parameters.

In the Create Spatial Points section, you need to Click to Add a Point. For each point you add, fill in the following information.

Parameter	Description
Longitude Column Name	Input column that contains longitude values.
Latitude Column Name	Input column that contains latitude values.
Target Column Name	Column in the gem output that will contain resulting geo points.

Example

Assume you have the following airline route table.

start_city	start_lat	start_long	destination_city	destination_lat	destination_long
New York	40.7128	-74.0060	Los Angeles	34.0522	-118.2437
London	51.5074	-0.1278	Paris	48.8566	2.3522
Tokyo	35.6895	139.6917	Sydney	-33.8688	151.2093
Toronto	43.6511	-79.3470	Chicago	41.8781	-87.6298
Dubai	25.2760	55.2962	Mumbai	19.0760	72.8777

To convert the start and destination coordinates into geographic points:

1. Create the first column pairing:

   1. Click Add a Point.

   2. For Longitude Column Name, select the start_long column.

   3. For Latitude Column Name, select the start_lat column.

   4. For the Target Column Name, type source_point.

2. Create another column pairing:

   1. Click Add a Point.

   2. For Longitude Column Name, select the destination_long column.

   3. For Latitude Column Name, select the destination_lat column.

   4. For the Target Column Name, type dest_point.

Result

The CreatePoint gem will produce the following output with two new columns: source_point and dest_point.

start_city	start_lat	start_long	destination_city	destination_lat	destination_long	source_point	dest_point
New York	40.7128	-74.0060	Los Angeles	34.0522	-118.2437	POINT (-74.0060 40.7128)	POINT (-118.2437 34.0522)
London	51.5074	-0.1278	Paris	48.8566	2.3522	POINT (-0.1278 51.5074)	POINT (2.3522 48.8566)
Tokyo	35.6895	139.6917	Sydney	-33.8688	151.2093	POINT (139.6917 35.6895)	POINT (151.2093 -33.8688)
Toronto	43.6511	-79.3470	Chicago	41.8781	-87.6298	POINT (-79.3470 43.6511)	POINT (-87.6298 41.8781)
Dubai	25.2760	55.2962	Mumbai	19.0760	72.8777	POINT (55.2962 25.2760)	POINT (72.8777 19.0760)