public SpatialIndex(String shpFilename) throws IOException {
  this.shpFileName=shpFilename;
  if (logger.isLoggable(Level.FINE)) {
    logger.fine("SpatialIndex(" + shpFilename + ");");
  }
}

public SpatialIndex ( String shpFilename ) throws IOException { this . shpFileName = shpFilename ; if ( logger . isLoggable ( Level . FINE ) ) { logger . fine ( "SpatialIndex(" + shpFilename + ");" ) ; } }
opens a spatial index file for reading based on the location of the provided shp file .
