Use Case ONTO24: Translate By Vector

[ar-chad]

Use Case ONTO24

Translate By Vector

As a GeoSPARQL data user I would like to translate a geometry coordinates by a vector (x, y, z).

For the POLYGON((0 0 0, 3 0 0, 3 5 0, 0 5 0, 0 0 0)) and the vector (2, 1, 0) the value is POLYGON((2 1 0, 5 1 0, 5 6 0, 2 6 0, 2 1 0)).

Function signature:

vectorTranslate(geometry: ogc:geomLiteral, xsd:double, xsd:double, xsd:double): geometry: ogc:geomLiteral

Actor: GeoSPARQL data user (human or software agent querying RDF dataset with GeoSPARQL)

Preconditions

Features and Geometries with 2D and 3D representations are present in a dataset to be queried. The translate by vector function is discoverable.

Postconditions

A SPARQL query can be executed that includes a function to return geometry with coordinates translated by a vector from a given geometry coordinates. The results of the query are known to be true or false in 2D and 3D.

Steps

Actor: discovers translate by vector function implemented by the system
Actor: executes a SPARQL query containing translate by vector function with a geometry and three double values corresponding to (x y z) translation vector as arguments.
System: returns a SPARQL result with a geometry coordinates translated by a vector from the input geometry.