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4. DATA QUALITY <br /> Answer as many of the following questions as possible for all data types . Questions with an <br /> asterisk ( * ) must be answered . <br /> Why were these data collected ( i .e . , for what purpose ) ? <br /> * How were these data collected ? <br /> *When were these data collected ? <br /> Have these data been updated since their original creation ? If so, how often and what was <br /> the nature of the update ? <br /> When was the last update and what percentage of the data were affected (estimate if <br /> unknown and indicate if is approximate) ? <br /> ( GIS Director Signature ) Date <br /> 6- 16 <br /> GIS Needs Assessment and Implementation Plan Chapter 6 - Data Standards and Transfer <br />