Walter Witschey and Clifford Brown have compiled a comprehensive GE map of Maya sites. This is an awesome resource that can be easily converted from KMZ (i.e. the GE file) to a shapefile for use in ArcGIS. You can check it out here: http://mayagis.smv.org/index.htm.
Version 2 has just been released for ASTER DEM data. This release includes improvements in resolution, better water coverage, and a reduction in voids and anomalies. To read more about the improvements and to download data: http://www.ersdac.or.jp/GDEM/E/4.html
The library maintains a shared network drive of GIS data. The data primarily covers North America, but there is some South America data in there as well. This drive is also where you can find the tutorial data for the ArcGIS tutorials. The drive is called \\vuesri\\arcimage. For instructions on how to connect to the [...]
Aster DEM data is now available for free here.
When you follow the link, there will be a menu on the left-hand side of the page. Click \”search\” to access the map which will allow you to select the correct data files to download. The site requires you to register, but the data is available [...]
This info from Jacob Thornton, GIS coordinator for the library:
Many of you have expressed interested in accessing GIS data that is offered via the site license, and I’m excited to announce its availability on campus. ESRI Data & Maps 9.3 including ‘Data & Maps and Streetmap North America’ and ‘Global Imagery and [...]