MERGEPOLY: Stata module to merge adjacent polygons from a shapefile

Robert Picard and Michael Stepner

Statistical Software Components from Boston College Department of Economics

Abstract: mergepoly inputs a shapefile in the dual Stata dataset format generated by -shp2dta- (SSC) and merges adjacent polygons by removing all shared line segments and reconnecting the remaining line segments into polygons that follow the outer borders of the original polygons. The -by()- option can be used to merge features by attribute groups. You can, for example, merge U.S. State boundaries by Census division codes and create a new shapefile that describes the division boundaries. The shapefile produced by mergepoly is in a format that can be immediately visualized using -spmap- (SSC).

Language: Stata
Requires: Stata version 9.2
Keywords: data management; shapefiles; GIS; polygons; shp2dta; spmap (search for similar items in EconPapers)
Date: 2012-12-21, Revised 2015-08-16
Note: This module should be installed from within Stata by typing "ssc install mergepoly". The module is made available under terms of the GPL v3 (https://www.gnu.org/licenses/gpl-3.0.txt). Windows users should not attempt to download these files with a web browser.
References: Add references at CitEc
Citations: View citations in EconPapers (3)

Downloads: (external link)
http://fmwww.bc.edu/repec/bocode/m/mergepoly.ado program code (text/plain)
http://fmwww.bc.edu/repec/bocode/m/mergepoly.hlp help file (text/plain)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:boc:bocode:s457574

Ordering information: This software item can be ordered from
http://repec.org/docs/ssc.php

Access Statistics for this software item

More software in Statistical Software Components from Boston College Department of Economics Boston College, 140 Commonwealth Avenue, Chestnut Hill MA 02467 USA. Contact information at EDIRC.
Bibliographic data for series maintained by Christopher F Baum ().