I have a shapefile with all the buildings of the region. In the attribute table I have a field containing the date that the individual buildings have been built. I need to count how many buildings have been built in the region in certain years.
How can I change the specific dates (e.g. 15.2.2008) (the field is text form, not numeric) into year (2008)?
I use both QGIS and ArcGIS (ArcInfo), so any tips for either programme would be great.