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The CA GIS Council has announced the completion of the 2014 California Parcels Dataset. It is currently available on the LA County GIS website until the State can put it on theirs. http://egis3.lacounty.gov/dataportal/2015/09/11/california-statewide-parcel-boundaries/


Sounds like you need to use the Interesct tool. This will output a new SHP file of driveways that overlap your land parcels along with the attributes of both datasets. You can then add a new field to this outout dataset and calculate the geometry of each polygon to give you the area of driveway. Assuming each land parcel has a unique ID you can then ...


A simple way to approach this would be to select the 100 year floodplain and save that as a new layer using Data Export in ArcMap (right-click the layer in the Table of Contents). Then, for step 3 (read below for step 2), you will do a Union (in the Geoprocessing Menu) of the 100 year floodplain layer and the parcels. What you get from that is a combined ...

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