ibra7_nbs: IBRA 7 region adjacency matrix

Description Usage Format Details Source

Description

A 9659 x 9659 logical adjacency matrix indicating whether the ibra7_albers polygon whose ID is given by ibra7_nbs the row name is adjacent to ("touches", sensu GEOS) the polygon with ID given by the column name. Row sums (or, equivalently, column sums) give the total number of polygons that a given polygon touches. Note that the diagonal is FALSE, i.e. polygons are not considered to touch themselves.

Usage

1

Format

A matrix with 9659 rows and 9659 columns.

Details

This dataset was derived from the IBRA 7 regions polygon shapefile provided by the Australian Government Department of the Environment. The original (geodetic, GDA94) shapefile was disaggregated to convert multipart polygons to single parts (using QGIS 2.10.1), after which the rgeos:gTouches function was used to produce the adjacency matrix.

Source

Department of the Environment (2012), Interim Biogeographic Regionalisation for Australia (Regions - States and Territories) v. 7 (IBRA) [ESRI shapefile] Available from http://www.environment.gov.au/fed/catalog/search/resource/details.page?uuid=%7BFB89EEC9-5ABE-4CCD-B50E-7D485A3BAA4C%7D


johnbaums/things documentation built on May 19, 2019, 3:03 p.m.