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convert a shapefile from NZGD2000 (found on LINZ) to WGS84 (different source spacial reference system and output srs)
ogr2ogr -f "ESRI Shapefile" wgs84.shp linz.shp -s_srs EPSG:2193 -t_srs EPSG:4326 -lco ENCODING=UTF-8
convert a shapefile from NZGD2000 to GMT (generic mapping tools) format WGS84 (for use with tools like gmt psxy) (changing output format)
ogr2ogr -f "OGR_GMT" wgs84.gmt linz.shp -s_srs EPSG:2193 -t_srs EPSG:4326
NOTE: GMT (5.3) will not plot segments with missing headers gmt.soest.hawaii.edu/issues/1072 which results in missing segments. GRASS will output all headers when exporting OGR_GMT (v.out.ogr). Alternatively run a command like the following to remove all headers
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