Property records, when combined with an accurate land base such as orthoimagery, form the foundation to many geographic information systems (GIS). UGT uses a combination of coordinate geometry (COGO) and heads-up digitizing to complete parcel mapping projects utilizing client furnished source material. A variety of software packages are used to achieve this, including MicroStation and ESRI ArcGIS. ESRI's personal geodatabase is a popular format to deliver parcel mapping databases and associated attributes.