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| A map produced by NISRA in 2015 showing all towns in Northern Ireland, defined as areas with a population greater than 5,000 |
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A large town has a population of 18,000 plus, a medium town between 10,000 and 18,000 and a small town 5,000 to 10,000 inhabitants.
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Using 2011 Census information, Nisra separates places into seven different categories, with Belfast and Derry in the top two bands for population, at just more than 280,000 and 83,000 respectively.
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The remaining five are divided into towns (large, medium or small), intermediate settlements and villages.
| Settlement | Population |
|---|---|
| Belfast | 280,138 |
| Londonderry | 83,163 |
| Newtownabbey (Metropolitan) | 65,646 |
| Craigavon Urban Area (including Aghacommon) | 64,323 |
| Bangor | 61,011 |
| Castlereagh (Metropolitan) | 55,857 |
| Lisburn (City) | 45,370 |
| Ballymena | 29,551 |
| Newtownards | 28,050 |
| Carrickfergus | 27,998 |
| Newry | 26,967 |
| Coleraine | 24,634 |
| Antrim | 23,375 |
| Omagh | 19,659 |
| Larne | 18,755 |
| Banbridge | 16,637 |
| Armagh | 14,777 |
| Dungannon | 14,340 |
| Enniskillen | 13,823 |
| Strabane | 13,172 |
| Limavady | 12,032 |
| Cookstown | 11,599 |
| Holywood | 11,257 |
| Downpatrick | 10,822 |
| Ballymoney | 10,402 |
| Ballyclare | 9,953 |
| Comber | 9,071 |
| Magherafelt | 8,805 |
| Warrenpoint (including Burren) | 8,732 |
| Portstewart | 8,003 |
| Newcastle | 7,672 |
| Carryduff | 6,961 |
| Donaghadee | 6,869 |
| Kilkeel | 6,541 |
| Portrush | 6,454 |
| Dromore | 6,003 |
| Ballynahinch | 5,703 |
| Coalisland | 5,682 |
| Greenisland | 5,486 |
| Ballycastle | 5,237 |
| Crumlin | 5,140 |
| Randalstown | 5,126 |
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The travelling salesman problem asks the following question: "Given a list of cities and the distances between each pair of cities, what is the shortest possible route that visits each city and returns to the origin city?"
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This app calculate the optimized route between the towns that make up Northern Ireland. stating position and ending position remains same. It gives you a optimized sequence of places to travel so that all places could be covered in minimum distance exactly once.