I need to clip a large and very detailed .shp file in QGIS showing environmental data similar to a temperature map. Is there something like the very simple crop tool alike in photoshop where you can drag a rectangle over an area of interest and crop the shapefile to this area only?
I do have an additional shape file of neighborhoods/districts that I could also use for cropping but I do not know how to specify "extract a shp/kml only within the borders of district X, row xxxxx in the attribute table of districts.shp"
How can I extract the data primitively within a rectangle of choice or per district?! I need smaller pieces from the large map that has been provided by an environmental geo-institute to be implemented into an mobile Application (Android) to view the quite heavy data in a lighter way.
I made some screenshots of the data and posted them here: http://merglindev.wordpress.com/2012/10/22/extracting-districts-from-big-shapefile-data/. You can see the districts and the data layers. I need to have every district as a separate file / separately export every dataset per district to kml.