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database can be used as a source for address point creation ; additional address <br /> information from the parcel layer can be used to create address points for any addresses <br /> that may not be in the utility database . <br /> Addresses in the MSAG database should be address-matched to the situs address of each <br /> parcel in the parcel layer; records that do not exist in the MSAG database that do exist in the <br /> parcel layer should be verified and incorporated as address points as well . The centroid of <br /> each parcel will serve as the preliminary address point . Addresses that exist in the MSAG <br /> database that do not exist in the parcel layer should be verified and reconciled to a valid <br /> City address . <br /> Use of the MSAG database is recommended due to the fact that it contains records for <br /> multi-unit addresses that may only exist as a single address in the parcel layer. The creation <br /> of a comprehensive address point layer may require additional data sources , such as the <br /> permits database , should there be addresses that are not accounted for in the MSAG <br /> database and in the parcel layer. <br /> Once address points are created , they should be rectified to the appropriate location <br /> through use of digital orthophotography as well as GPS field work ( as needed ) . The GIS <br /> Director, in conjunction with the recommended County GIS Steering Committee, will need to <br /> develop business logic for the placement of multi-unit address points and other special case <br /> addresses , such as mobile homes . In addition , QA procedures will need to be utilized to <br /> identify addresses in the MSAG database ( and/or parcel layer) that are incomplete , <br /> inconsistent, or out of date . The creation of an address point layer is often an iterative <br /> process that requires multiple efforts before a comprehensive and up- to-date address point <br /> layer is created . <br /> This layer will serve as the most used base map layer along with tax parcels . Maintenance of <br /> the layer will be coordinated between Community Development and the GIS Director. <br /> 4- 11 <br /> GIS Needs Assessment and Implementation Plan Chapter 4 - Base Map Creation and Consideration <br />