Chapter 42: The GREMOVE Procedure

Overview

The GREMOVE procedure processes a map data set that is used as input. It does not produce any graphics output. Instead, it produces an output data set that typically becomes the input map data set for the GMAP procedure (see Chapter 35, The GMAP Procedure, on page 995). The GREMOVE procedure combines unit areas defined in a map data set into larger unit areas by removing shared borders between the original unit areas. For example, Figure 42.1 on page 1224 and Figure 42.2 on page 1224 show combined unit areas in a typical map data set by removing state boundaries to create regional census divisions.

Figure 42.1: Map before Removing Borders (GRMUSMAP(a))

Figure 42.2: Map after Removing Borders (GRMUSMAP(b))

The program for these maps is shown in Example 1 on page 1228.