EXPLANATION FOR TSP INSTANCES FILES
----------------------------------- 
Instances used on Ph.D. thesis of Alejandro Rodríguez Villalobos, named "Study of the effect of asymmetry in vehicle routing problems" and related papers.

LOCATION FILES
--------------
The filename is composed from several acronyms
	ab_ddde.txt  
when:

a = Territory or geographical area
	C = Corta distancia, short distances, intra-city  
	M = Media distancia, medium distances, inter-city
	L = Larga distancia, large distances, national transport
			
b = Location of the nodes on territory
	A = Aleatoria, random 
	R = Radial
	C = Cuadricula, grid

ddd = Number of nodes
	from 050, 100, 150 ... to 500 nodes

e = Instance replica
	from 1, 2 ... to 5 (all replicas are different)
	
Each line of file is a node geo-coordinates (latitude tab longitude).		
	
	
MATRIX FILES
--------------
The filename is composed from several acronyms
	abcddde.txt  
when:

c = Type of matrix
	O = Orthodromic, symmetric matrix Cij = Cji from great circle distance ij
	P = Pequeña, symmetric matrix from minor Cij, Cji from A matrix
	G = Grande, symmetric matrix from major Cij, Cji from A matrix
	T = Transformed, symmetric transformed matrix from A
	A = Asymmetric, real distances matrix from SIG (shortest way ij)
	
The file contents the Cij distances (kilometers) with tab separations. This is, distances from i (rows) to j (columns).

--------------------------------------
For more information please contact.
http://soa.iti.es/alex