the four sub layouts in a more common situation where only one via 308 is interconnected to the mesh plane in this case the activate a substantial portion and remove approach and multiple line shape storage approaches of the invention have been implemented such that the layout includes only 1 915 features and results in a file storage size of 248 kb i e a 59 reduction compared to that for fig1 a in the previous discussion it will be understood that the method steps discussed are performed by a processor such as cpu 34 of system 30 executing instructions of program product 42 stored in memory it is understood that the various devices modules mechanisms and systems described herein may be realized in hardware software or a combination of hardware and software and may be compartmentalized other than as shown they may be implemented by any type of computer system or other apparatus adapted for carrying out the methods described herein a typical combination of hardware and software could be a general purpose computer system with a computer program that when loaded and executed controls the computer system such that it carries out the methods described herein alternatively a specific use computer containing specialized hardware for carrying out one or.