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MERGEPOLY: Stata module to merge adjacent polygons from a shapefile

Author

Listed:
  • Robert Picard
  • Michael Stepner

Programming Language

Stata

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).

Suggested Citation

  • Robert Picard & Michael Stepner, 2012. "MERGEPOLY: Stata module to merge adjacent polygons from a shapefile," Statistical Software Components S457574, Boston College Department of Economics, revised 16 Aug 2015.
    • Handle: RePEc:boc:bocode:s457574
    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.
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    Download full text from publisher

    File URL: http://fmwww.bc.edu/repec/bocode/m/mergepoly.ado
    File Function: program code
    Download Restriction: no
    File URL: http://fmwww.bc.edu/repec/bocode/m/mergepoly.hlp
    File Function: help file
    Download Restriction: no
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    Citations

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    Cited by:

    1. Mehmet Guney Celbis & Peter Nijkamp & Jacques Poot, 2015. "Infrastructure and the International Export Performance of Turkish Regions," World Scientific Book Chapters, in: Amitrajeet A Batabyal & Peter Nijkamp (ed.), THE REGION AND TRADE New Analytical Directions, chapter 11, pages 319-350, World Scientific Publishing Co. Pte. Ltd..
    2. Celbis M.G. & Crombrugghe D.P.I. de, 2014. "Can internet infrastructure help reduce regional disparities? : evidence from Turkey," MERIT Working Papers 2014-078, United Nations University - Maastricht Economic and Social Research Institute on Innovation and Technology (MERIT).
    3. Celbis, M.G. & Crombrugghe, D. de & Muysken, J., 2014. "Public investment and regional politics: The case of Turkey," MERIT Working Papers 2014-020, United Nations University - Maastricht Economic and Social Research Institute on Innovation and Technology (MERIT).

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