Process_Step:
Process_Description: Tax parcel boundaries were initially maintained manually on mylar originals, using erasable ink. In 1991, a series of planimetric base data sets were produced from aerial photography, and are now referred to as the 1991 Tompkins County Digital Planimetric Base Map. The tax parcel mylar maps were digitized using MapGrafix and referenced to the 1991 Tompkins County Digital Planimetric Base Map. In 1997, the MapGrafix data sets for the City of Ithaca and the Towns of Caroline and Danby were approved by the State of New York Office of Real Property Services. In 1998, the Map Grafix data sets were converted to Arc/Info for the City of Ithaca, Towns of Caroline, Danby, Dryden, and Ithaca, and the Villages of Cayuga Heights, Dryden, and Freeville. In 1999, the Towns of Enfield, Groton, Lansing, Newfield, and Ulysses, and the Villages of Groton, Lansing, and Trumansburg were converted to Arc/Info. Beginning with the 1999 tax year, all tax parcel boundaries are maintained in Arc/Info, all tax maps are printed using ArcView, and all tax maps are archived digitally using Adobe Acrobat, as well as the traditional paper archival. During the transition period from paper to digital maps, parcel boundaries are approximate, except for those boundaries that have been input using paper surveys and legal descriptions. The tax parcel data sets consist of three groups of layers: boundary layers, text layers, and region layers. The boundary layers consist of those Arc/Info feature classes upon which the region layers are created. Boundary layers include the nodes, arcs, and polygons. Parcel boundaries are changed by first modifying the arc and node layers, and updating the arc attributes. Next, the polygons are re-created and their attributes are updated. The text layers are then updated to reflect the boundary changes. Finally, the regions are created from the polygons using polygon attributes and the Arc/Info REGIONDISSOLVE command. The text layers are Arc/Info annotation layers and include acreage, block, dimension, non-roll section 1 (exempt/utility/state lands), lot, Military Tract/Watkins and Flint Purchase, municipality, place, road name, special district, tax map, tic mark, and water text, as it appears on the printed tax parcel maps. The region layers include deed book/page, municipal, parcel, printkey, and tax map regions. The tax map regions from each of the municipal data sets for the current tax year are then combined into a county-wide data set.
Process_Date: 1998 (partial coverage), 1999 and beyond
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Tompkins County ITS GIS Division
Contact_Person: Kirk Eby
Contact_Position: GIS Project Leader
Contact_Address:
Address_Type: mailing and physical address
Address: 128 East Buffalo Street
City: Ithaca
State_or_Province: New York
Postal_Code: 14850
Country: USA
Contact_Voice_Telephone: (607) 274-5418
Contact_Facsimile_Telephone: (607) 274-5420
Hours_of_Service: M-F 8:30 a.m. to 4:30 p.m.
