The following information was passed on to me by Valerie Murdock of the Census Bureau, Geography Division. Sketch Maps and Supporting Documentation for the Traffic Analysis Zone (TAZ) program The Census Bureau has been receiving TAZ sketch maps from participants that do not provide adequate information. It is very important that participants adhere to the guidelines documented on pages 5 of 10 in the Reference section, of the TAZ-UP manual to ensure that the Regional Census Center (RCC) staff can clearly interpret and digitize the 2000 TAZ boundaries. If the required information is missing from sketch maps the RCC staff may not be able to clearly interpret the participant*s intentions. This might result in the desired features not being held as 2000 TAZ boundaries. Only submit sketch maps when a feature you wish to use as a 2000 TAZ boundary is missing from the TIGER/Line 1998 file or when you wish to reclassify a feature by changing it*s Census Feature Classification Code. Do not submit shape files, electronic files, or local maps in lieu of sketch maps.When adding/reclassifying a boundary feature to be included in the TIGER data base, all sketch maps should be annotated with: 1)The name or identification of the added/reclassified feature, such as *Johnson Blvd* or *creek;* 2)The Census 2000 TAZ boundary and Census 2000 TAZ codes that are using this feature; 3)The entire feature, not just the portion of the feature that is used as a Census 2000 TAZ boundary; 4)The state and county codes; and All polygons split by added TAZ boundary features must contain *PPPPPP* TAZ code in the TAZ equivalency file. The actual TAZ boundaries and codes for these split polygons are to be annotated on the sketch maps. In addition, all added features must currently exist. Do not submit planned roads unless the right-of-way is cleared. All street feature update requests to be used as TAZ boundaries must include documentation that proves that they exist. The RCC geographers may request current aerial photography or satellite imagery to verify new features being requested.All nonstreet feature requests for TAZ boundaries are subject to the concurrence of the regional census center (RCC) geographers.