How can the layers of a GIS be manipulated??? THANKS SO MUCH FOR YOUR HELP!! :)

5 answers

What do you mean by GIS?
Geographical Information Systems
Check this answer.

http://answers.yahoo.com/question/index?qid=20081015175949AAOVSD5

Also check the instructions with your software.
THANKS SO MUCH AGAIN!!!! :)
In addition to the points mentioned in the reference, a good GIS system can also manipulate the meta-data of each layer, storing them in a database, and thus be searchable.

For example, a user could potentially provide the coordinates of a polygon and query the number of households within the polygon, or the total tax revenue, etc.