/**
 * GeoParquet (spec: issue #14). Decodes with hyparquet — a pure-JS, zero-dep
 * Parquet reader — plus hyparquet-compressors for snappy/gzip/zstd (its zstd
 * IS the same `fzstd` the Arrow path already bundles; no second codec ships).
 * hyparquet reads the GeoParquet `geo` file metadata and decodes the WKB
 * primary geometry column to GeoJSON geometry itself, so no WKB decoder is
 * ours to maintain.
 *
 * What IS ours: `geo` metadata validation, a CRS84 guard (deck.gl renders in
 * lng/lat — a projected file would land in the ocean, so a non-CRS84 CRS is a
 * loud structured error until the reprojection workstream lands, NOT a silent
 * skip the way GL does it), and the Arrow geometry rule from
 * `arrowTableToLayerData` — all-Point tables transpose to columnar (zero row
 * materialization on the render path), while lines/polygons/mixed become
 * GeoJSON feature rows that every geometry consumer speaks.
 */
import type { LayerData } from "./ir";
/** The parsed GeoParquet `geo` file-metadata value (a JSON string in key_value_metadata). */
export interface GeoParquetMetadata {
    primary_column?: string;
    columns?: Record<string, {
        encoding?: string;
        geometry_types?: string[];
        crs?: unknown;
    }>;
}
/**
 * hyparquet rows (geometry already decoded to GeoJSON) → LayerData, applying
 * the CRS guard and the Arrow all-Point-columnar / lines-polys-feature-rows
 * split. `rows` is consumed after the geo-metadata gate in data-layer's
 * PARQUET_FORMAT.
 */
export declare function geoParquetToLayerData(rows: Record<string, unknown>[], geo: GeoParquetMetadata, url: string): LayerData;