GIS Links of Interest
GIS Dictionary: ESRI's GIS dictionary is a complete online dictionary of GIS-related terms.
GIS-T.org: GIS for Transportation Symposium is sponsored by the American Association of State Highway and Transportation Officials and is held in various cities across the United States.
The Urban Regional Information Systems Association (URISA): The Urban and Regional Information Systems Association (URISA) is a non-profit professional and educational association that promotes the effective and ethical use of spatial information and information technologies for the understanding and management of urban and regional systems.
Trimble (GIS/GPS Data collection equipment and software): Trimble provides high quality GIS/GPS equipment and software for heavy field use. Trimble handheld field computers are considered the industry standard for data collection and are commonly used with GIS software such as ESRI's ArcPad software
Leica Geosystems: A commercial developer of high quality, industrial survey equipment and is also known worldwide for it's first-class geospatial modeling software and Photogrammetry (aerial imagery) software.
GIS Pilot: GIS Data by State, other good GIS resources for data and research
Environmental Systems Research Institute (ESRI)
The Geographic Information Systems Poster by the United States Geological Survey (USGS)
The National Map Viewer by the United States Geological Survey (USGS)
The Geography Network by the Environmental Systems Research Institute
GISLounge GIS Users Forum and Knowledge Base
ESRI ArcGIS Knowledge Base (How to Technical Guides)
Interpolation is a method of constructing new data points from a discrete set of known data points.