What is GIS? Geographic Information System
What is a Shapefile? Shapefiles are GIS files that consist of .shp, .dbf, .shx, and .prj files.
What is an ArcInfo Export (.e00) file? ArcInfo Export files are converted to ArcInfo Coverage files using ArcToolBox or other conversion utilities.
What is Old Hawaiian Datum (OHD)? "Old Hawaiian Datum" is an independent datum that was derived from the "North American Datum 1927" (NAD27). The C&C of Honolulu GIS currently uses "Old Hawaiian Datum" (OHD).

What is NAD83?

NAD83 is the "North American Datum 1983". NAD83 is an improvement in accuracy over "Old Hawaiian Datum". This is the datum that the Statewide GIS Program currently uses.

What is Metadata? Metadata is "data about data". These are .meta, .met, .txt files that describe the GIS layers.
What is ArcExplorer? is a free GIS Data Viewer program from ESRI.
How can I learn ArcExplorer? ArcExplorer User Guides have tutorials.
What is ArcView? ArcView is a purchasable GIS mapping software by ESRI. For more information, go to ArcView by ESRI.
What is ArcInfo? ArcInfo is an advanced purchasable GIS mapping software by ESRI. For more information, go to .
Which version of GIS layers should I use? If you are unfamiliar with using GIS files, we recommend using the NAD83, shapefile format.
What is a .zip file? A .zip file is a compressed file consisting of one or more files with file sizes smaller than the originals. Zip files are compressed or uncompressed using Zip programs such as WinZip or PKzip.