Complex sentence: There are also some companies that sell software to locate land parcels or real estate on digitized FIRMs.These FIRM's are very useful in identifying whether a land or building is in flood zone are not.
Split into simpler sentences: There are also some companies that sell software to locate land parcels or real estate on digitized FIRMs. These FIRMs are very useful in identifying whether a land or building is in flood zone are not.