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ioble <br /> MSAG �'rlly <br /> Address Point layer <br /> Address match records to <br /> parcel centroids <br /> Generate additional address Cn) r� Geo.mlemnce (reclily) withGP dleRal <br /> points from parcel centroids a e., -- V , > otlM1apM1W ort as n and GPS Held <br /> records not In MSAG database) / work. as needed <br /> Geocoding may be used as ❑ ❑ • <br /> a secondary means of <br /> determining address points <br /> A Typical Address Point Generation Workflow <br /> Address Points and Geocodina <br /> An alternative means for generating address points is based on geocoding t s6tg the street <br /> centerline layer. Geocoding (also known as address matching) with the street centerline <br /> layer yields address points based on an interpolated value using address ranges for each line <br /> segment . Although this method is somewhat effective in creation of address points, it is not <br /> nearly as accurate as an address point layer as referenced above . In geocoding , points are <br /> offset from the street centerline by a set distance (typically 50 feet) in order to place them in <br /> " relative proximity to each parcel ' s centroid ( center point) . While this methodology provides <br /> a quick means for generating address points, an inherent lack of positional accuracy for <br /> each point is problematic . <br /> Interpolated locations , such as those yielded by geocoding , have traditionally been <br /> inaccurate and often times inconsistent—this depends both on the accuracy of the <br /> underlying street centerlines used as well as the configuration parameters used for <br /> geocoding . One of the key limitations of using an offset parameter in order to place points <br /> closer to their " true " location is that addresses close to an intersection or end of a line <br /> segment will not have the same offset as those near the center of a street segment . A <br /> diagram below illustrates how offsets can be misleading in such cases . <br /> 50 font <br /> offset <br /> An address interpolated to a sheet segment center will be placed <br /> at the specified 50 toot offset. <br /> 4- 13 <br /> GIS Needs Assessment and Implementation Plan Chapter 4 - Base Map Creation and Consideration <br />