1. A method of incorporating parcel data into a database, comprising: receiving parcel data from a first source, said parcel data including boundary coordinates; converting the parcel data from the first source into a format for storage in a common format database; receiving parcel data from a second source; converting the parcel data from the second source into the format for storage in the common format database, including projecting the parcel data into a common projection, checking spatial accuracy of the projected parcel data, integrating the projected parcel data with data to form, integrated parcel data, and repairing geometries of the integrated parcel data; storing the converted parcel data from the first source and the integrated parcel data from the second source in the common format database; removing, by a processor, redundant parcel data between the converted parcel data from the first source and integrated parcel data from the second source; and retrieving parcel data from the common format database in response to a user request, wherein storing the converted parcel data from the first source and the integrated second source in the common format database includes receiving an indication to add the converted parcel data from the first source and the integrated parcel data from the second source to the common format database, and loading the converted parcel data from the first source and the integrated parcel data from the second source into the common format database using a spatial database interface.