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Bicycle/Pedestrian Digitize from base map Engineering <br /> Facilities data ; GPS field work Division /Surveying and Recommended <br /> Mapping <br /> Buidling Footprints Digitize polygons from aerial Property Appraiser <br /> photographs and existing <br /> and Mapping Existing <br /> ma s; existing CAD data <br /> Extract, cleanse, geocode <br /> Building Permits and map from CD-Plus Automated Recommended <br /> database <br /> Buildings with Site Manually digitize polygons Engineering <br /> Plans from plans and address Division /Surveying and Recommended <br /> sources Mapping <br /> City Limits Acquire from Ordinance Property Appraiser - GIS Existing <br /> Information and Mapping g <br /> Acquire using <br /> Contour Lines photogrammetric GIS Data Services Vendor Recommended <br /> techniques <br /> County Limits Acquire from Ordinance Property Appraiser - GIS Existing <br /> Information and Mapping g <br /> Easements Derived from aerial Property photography ; GPS field work p Y A ppraiser Existing <br /> Hydrography Geocoded/ Digitize GIS Director Existing <br /> Digitize polygons from aerial <br /> Land Useexistin hoto ra hs and Emergency Services or <br /> = p g st g Planning Existing <br /> maps; existingCAD data <br /> Parcels Acquired from tax records ; Property Appraiser - GIS <br /> Co o and Mapping Existing <br /> Digitize from base map <br /> Parks data ; aggregate layers as GIS Director Recommended <br /> needed <br /> Extract, cleanse , geocode <br /> Permitting and map from CD- Plus Automated Recommended <br /> database <br /> Railroads Derived from aerial <br /> photography; GPS field work GIS Director Existing <br /> Digitize from base map <br /> Right- of- way data ; aerial photography ; Engineering Division /Land <br /> g y aggregate layers as Acquisition Recommended <br /> needed <br /> Digitize from base map Engineering <br /> Schools data ; GPS field work Division/Surveying and Recommended <br /> Ma in <br /> Streams Derived from aerial GIS Director Existing <br /> - hoto ra h ; GPS field work <br /> Street Centerlines Derived from aerial GIS Director Existing <br /> photography; GPS field work <br /> 169 <br /> GIS Needs Assessment and Implementation Plan Chapter 1 - Departmental GIS Needs Assessment <br />