Our "Web Coverage Service (WCS)":http://www.opengeospatial.org/standards/wcs provides raw data values to GIS clients and is serving a number of elevation data sets. The "Wikipedia article on WCS":http://en.wikipedia.org/wiki/Web_Coverage_Service provides a useful overview of the WCS protocol. A list of the datasets can be found in our "Data Gallery":http://dev.sdmi-cms.gina.alaska.edu/data/data-gallery/#web-coverage-services. This service is currently in a testing phase and we would appreciate "feedback":/contact-us as to its usefulness. The URL for the service is http://wms.alaskamapped.org/wcs .