ldb_find_tiles: Find LiDAR tiles that intersect with given features

In mbedward/CERMBldb: Functions to manage a PostGIS database containing data derived from airborne LiDAR

Find LiDAR tiles that intersect with given features

Description

Queries the LiDAR tile metadata table ('lidar.metadata') in the database to identify tiles that intersect with the specified features.

Usage

ldb_find_tiles(db, x)

Arguments

db	A database connection.
x	A spatial object with supported by the sf package: either an sf data frame or a sfc geometry list. The object must have a coordinate reference system defined. It can contain one or more point, line or polygon features.

Value

A data frame with one row per matching LiDAR tile, and columns: 'tile_id' (unique integer identifier for the tile), 'datum' (original datum, either 'GDA94' or 'GDA2020'), 'zone' (MGA map zone, one of 54, 55 or 56), 'srid' (spatial reference identifier (EPSG code), 'filename' (source file name for the LiDAR data), 'capture_year' (4-digit year number), 'point_density' (average density across the tile expressed as points per square metre).

mbedward/CERMBldb documentation built on May 2, 2024, 8:10 a.m.