disputed.js

/* requires mapshaper @0.2.x */

ms = require('mapshaper');

get_disputed = function(lyr, arcs){
  if (lyr.geometry_type != 'polygon') {
	  stop("Layer not polygon type");
  }
  var arcCount = arcs.size();
  var data = lyr.data.getRecords();
  var shpl = new Uint16Array(arcCount);
  var shpr = new Uint16Array(arcCount);
  var arcs2 = [];
  var data2 = [];
  var lyr2;

  var parts, arcIds, arcId;
  for (var i=0; i<lyr.shapes.length; i++) {
	  parts = lyr.shapes[i]
	  if (parts && parts.length > 0) {
	    for (var j=0; j<parts.length; j++) {
		    arcIds = parts[j];
		    for (var k=0; k < arcIds.length; k++) {
		      arcId = arcIds[k];
		      if (arcId < 0) arcId = ~arcId;
		      
		      if (shpl[arcId]>0) {
			      shpr[arcId] = i+1;
		      } else {
			      shpl[arcId] = i+1;
		      }
		    }
	    }
	  }
  }


  var lid, rid, ld, rd, row;
  for (var i=0; i<arcCount; i++) {
	  lid = shpl[i]-1;
	  rid = shpr[i]-1;
	  
	  //inner
	  if (lid>=0 && rid>=0) {
	    ld = data[lid];
	    rd = data[rid];
	    row = {INTL:1, CHN:1, IND:1,
		         LA3:ld['ADM0_A3'], RA3:rd['ADM0_A3'],
      		   LBR:ld['sr_brk_a3'], RBR:rd['sr_brk_a3'],
		         LN:ld['NOTE_BRK'], RN:rd['NOTE_BRK']
		        };

	    // disputed if both sides are admin by same country
	    // or its a disputed border of India, China, Bolivia
	    // also filter Cyprus No Man's area
	    if ((ld['sr_brk_a3'] || rd['sr_brk_a3']) &&
		      (ld['ADM0_A3'] === rd['ADM0_A3'] ||
		       ['CHN','IND','BOL'].indexOf(ld['ADM0_A3'])>=0 ||
		       ['CHN','IND','BOL'].indexOf(rd['ADM0_A3'])>=0
		      )) {
		        row['INTL']=2;
	        } else if (ld['ADM0_A3']==='CNM' || rd['ADM0_A3']==='CNM') {
		        row['INTL']=2;
	        }
	    // no border aroud saichen glacier
	    if ((ld['ADM0_A3']==='KAS' || rd['ADM0_A3']==='KAS') &&
		      ld['ADM0_A3']!=='CHN' && rd['ADM0_A3']!=='CHN') {
		    row['INTL']=0;
		    row['CHN']=0;
	    }
	    if (ld['CHN_A3']==='CHN' && rd['CHN_A3']==='CHN') {
		    row['CHN']=0;
	    } else if ((ld['sr_brk_a3'] || rd['sr_brk_a3']) &&
		             (ld['CHN_A3'] === rd['CHN_A3'] ||
                  (ld['CHN_A3'] === 'PAK' && rd['CHN_A3'] === 'IND') ||
                  (ld['CHN_A3'] === 'IND' && rd['CHN_A3'] === 'PAK') ||
		              ld['CHN_A3'] === 'BOL' ||
		              rd['CHN_A3'] === 'BOL'
		             )) {
		               row['CHN']=2;
	               }
	    if (ld['IND_A3']==='IND' && rd['IND_A3']==='IND') {
		    row['IND']=0;
	    } else if ((ld['sr_brk_a3'] || rd['sr_brk_a3']) &&
		             (ld['IND_A3'] === rd['IND_A3'] ||
		              ld['IND_A3'] === 'BOL' ||
		              rd['IND_A3'] === 'BOL'
		             )) {
		               row['IND']=2;
	               }
	    arcs2.push(i);
	    data2.push(row);
	  }
  }
  lyr2 = ms.internal.convertArcsToLineLayer(arcs2, data2);
  lyr2.name = 'bounds';
  return lyr2;
}

main = function (infile, outfile) {
  dataset = ms.importFile(infile);
  dataset.layers[0] = get_disputed(dataset.layers[0], dataset.arcs);
  path = require('path')
  outopts = {'output_dir':path.dirname(outfile),
	           'output_file':path.basename(outfile),
	           'force':true};
  ms.exportFiles(dataset, outopts);
}

if (process.argv.length > 3) {
  main(process.argv[2], process.argv[3]);
} else {
  stop("Usage: node " + process.argv[1] + " infile outfile");
}