Initialize tiles with shapes and other properties

Initialize tiles with shapes and other properties

Usage

dmt_init_tiles(dmt)

Arguments

dmt

A DMT data structure with pts, edges, and udv_cells attributes. Assignment of points to tiles is provided in dmt$pts$agg_id, dmt$edges$agg_from, and dmt$edges$agg_to.

Value

A list data structure for tiles and their adjacencies. Includes the following attributes:

• meta_data: A data table with attributes for tiles:

  • X,Y: Centroid of each tile.

  • npts: Number of points in each tile.

  • shape: A sfc list-column with the geometries for each tile.

  • area,perimeter: Area and perimeter of each tile.

• edges: A data table with attributes for edges between adjacent tiles:

  • from,to: Tile IDs for the two tiles bordering this edge.

  • x0,y0,x1,y1: Centroid coordinates for the two tiles bordering this edge.

  • area,npts: Sum of areas and numbers of points in the two tiles bordering this edge.

  • edge_length: Total length of the border between the from and to tiles.

• pcs: A num_tiles x npcs matrix with the average embedding value over all cells in each tile.