Frequently Asked Questions
Q. Where can I obtain the PowerPoint presentation presented
at the Committee for a Smart New Jersey, Transportation and Geospatial
Information Systems Technical Seminar?
Q. What is a Geographic Information System?
A: A geographic information system (GIS) is a
computerized mapping system used to analyze geographic data and
databases to provide technical and analytical support for NJDOTs
Q. What kind of data is on hand?
A: Data is stored in mapping and graphics files. It comes
from sources such as accidents, construction, road inventory,
pavement, demographics, hydro and open space.
Q. What types of maps can be output?
A: The files can be output in various formats
of state, county and municipal
base maps as well as other specialized maps.
Q. What type of software do I need to view the state and
county maps on my computer?
A: The NJDOT GIS software standard is ESRI ArcGIS.
We post files in ESRI shapefile format and our files can also
be viewed with Adobe Acrobat Reader which is available free from
our state Adobe Access
Q. What format and projection are the maps in?
A: NAD83 (North American Datum) in feet.
Q. Where can I obtain the Orthoimagery for the entire
state of New Jersey?
A: To find and download the orthoimagery
visit the New Jersey Image
Warehouse web site.
Q. Is there a procedure for installing ArcExplorer software
and viewing the New Jersey aerial photos?
A: To install ArcExplorer and view the New Jersey
aerial photos use the ArcExplorer
Installation to View Orthophotos (pdf 840k)
Q. What is the NJDOT Transportation Data Model?
A: NJDOT Data Model information can be found in the NJDOT
Transportation Data Model Report (pdf 2.5m).
A. It's available here: NJ
Data Model Presentation. (pdf 2.8m).