Several years ago, preparing for its 2020 Master Plan, the City of Las Vegas sponsored a Community Vision Survey via the web. As of today, sample screens from the vision survey are available on the web page of the company which created the survey http://www.lrk.com/surveys/demo/lasvegas/start.html
. The survey solicited input on which of several images represents what you would like to see your community look like -- in various settings including downtown, neighborhoods, and commercial corridors. One problem with this survey in my opinion is that the images didn't necessarily reflect a desert climate.
The City's 2020 Master Plan is availabe online at http://www.lasvegasnevada.gov/files/MP2020_12092003.pdf
Livability and quality of life are among the terms used to reflect the intent of the City. This "Final Draft" is dated July 14, 2000; it was adopted by the City Council September 6, 2000.