ropologists could base their efforts. The archaeological digs uncovered many of the temples, public buildings and other structures that lined this major avenue. After these had been completed, a monumental layout emerged that would prove invaluable to the future research involving this significant site. (Sabloff 1981, p.198) In 1962 Rene Millon started his own archaeological project with the University of Rochester with the goal of producing a detailed map of Teotihuacan. For many years before the Teotihuacan Mapping Project, the true extent of this major ancient Mesoamerican city had not fully been conceived. Previous excavations led to the conclusion that the city's center, an area consisting of temples, plazas and the Street of the Dead, was the total area covered by this site. After this project the boundaries were extended when another major avenue was uncovered, the east-west axis. (Renfrew 2000, p.90) His photogrammetric map showed that this city was over 9 square miles and was fully urbanized. Around 1 A.D. it was laid out on this newly discovered grid plan that had an unusual feature, all structures were oriented to 15 degrees 25 minutes east of true north. This suggests that there was originally a detailed plan used by those who constructed Teotihuacan. (Coe 1984, p 90)Millon decided to use several methods to gain more understanding of the site and to map it more definitively. He used a combination of aerial and surface survey, as well as excavation, to produce a grid map of 147 squares. The use of a plane proved to be very important since many of the structures could be more easily identified as "irregular" from the air than from the thick vegetation below. Once the grid pattern was established, a team of anthropologists walked side by side in order to define the city limits and also collected many surface artifacts. After this intensive survey effort Millon discovered that this city had in fact been laid out in an organized...
