343 PLANAR COORDINATE DATA (R)Indicators - Both undefined; each contains a blank (^)Subfield Codes $a Planar coordinate encoding method (NR) $b Planar distance units (NR) $c Abscissa resolution (NR) $d Ordinate resolution (NR) $e Distance resolution (NR) $f Bearing resolution (NR $g Bearing units (NR) $h Bearing reference direction (NR) $i Bearing reference meridian (NR) $6 Linkage (NR) $8 Field link and sequence number (R)