LGL – Large Graph Layout

LGL is a compendium of applications for making the

visualization of large networks and trees tractable. LGL

was specifically motivated by the need to make the

visualization and exploration of large biological networks

more accessible. Essentially the network is a graph,

which is the data that you define, and LGL is responsible

for showing it to you.

source: http://sourceforge.net/projects/lgl

LGL - Features

● Scalable generation - > 5 million edges in some

graphs (source: http://www.opte.org/maps/)

● 2D and 3D layout

– 3D layout output as VRML, requires viewer

– 2D layout requires rudimentary Java viewer

● Source code available for generator and viewer

● Linux only, with GNU compilers

LGL - Features, cont.

● Submit edge file, get coordinates of layout

● Can assign color, description to vertices, edges

● Unknown animation options, if any

source: http://www.opte.org/ The Opte Project – modeling the Internet

A Protein Homology Graph (32,727 Proteins with 1,206,654 Edges). Color coded based on layout hierarchy.source: http://lgl.sourceforge.net/

Zoomed Region of the Yeast Protein Interaction Map in 3D (VRML)