Module rinf 

ERA RINF SPARQL retrieval module (feature 006).

Provides:

• The SparqlClient trait so production code can hit the real endpoint via UreqSparqlClient while tests inject deterministic fixtures.
• A tiny inline WKT LINESTRING parser (avoids pulling a wkt crate).
• Builders for the two SPARQL queries documented in specs/006-download-rinf-topology/research.md.
• Row-to-core-model mappers that produce Netelement / NetRelation instances ready for downstream workflows.

Structs

UreqSparqlClient

Default blocking SPARQL client backed by [ureq].

Traits

SparqlClient

Pluggable SPARQL transport — production uses ureq, tests use mocks.

Functions

build_netelements_query

Build the netelements SPARQL query for a given closed WGS84 polygon WKT.

build_netrelations_query

Build the netrelations SPARQL query for a list of seed element IRIs.

fetch_netelements

High-level helper: fetch + parse netelements for a search polygon.

fetch_netrelations

High-level helper: fetch + parse netrelations for the given seed IRIs.

linestring_length_meters

Approximate length of a WGS84 LineString in meters (great-circle, equirectangular).

map_netelements_to_core

Map parsed netelement rows to core Netelement structs.

map_netrelations_to_core

Map parsed netrelation rows to core NetRelation structs.

parse_netelements_response

Parse the SPARQL-JSON response for the netelements query.

parse_netrelations_response

Parse the SPARQL-JSON response for the netrelations query.

parse_wkt_linestring

Parse a LINESTRING(...) WKT into a [LineString<f64>].