What is GIS? |
Geographic Information Systems (GIS) is defined as an information system that is used to input, store, retrieve, manipulate, analyze and output geographically referenced data or geospatial data, in order to support decision making for planning and management of land use, natural resources, environment, transportation, urban facilities, and other administrative records.
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What is Layering? |
GIS uses layering to create custom mapping that can be queried to extract data. Data layers represent geographic entities of the earth and other physical features. These layers can be applied individually or in a mosaic to represent the area that needs to be viewed.
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| How is GPS used in GIS? |
The Global Positioning System (or GPS) is a collection of U.S. Government owned satellites that provides highly accurate, worldwide positioning and navigation information. There are twenty-four NAVSTAR GPS satellites which orbit 12,000 miles above the earth, constantly transmitting the precise time and their position in space. GPS receivers which we use on earth, connect with three to twelve satellites and, from that determine the precise location of the receiver on earth. With the information provided by the GPS we can then store attributed information and visually place it in a database for reference and analysis.
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| What does my computer need to use the IMS viewer? |
The minimum system requirements for your computer are:
- Recommended Internet Connection: Broadband (Cable / DSL or higher)
- Operating System: Windows 2000 or newer
- Browser: Internet Explorer ( 6.0 or higher )
- ActiveX Control: ActiveCGM Browser ActiveX Control
- Monitor Resolution: 1024 x 768 or higher
- Colors: 65,536 (16 bit) or higher
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| Who do I contact if I find incorrect information on this site? |
If you come across incorrect information please contact us either by phone or through email. Your input is greatly appreciated.
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| What coordinate system does the City of Winchester use?
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Coordinate System
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Projection |
VA Zones |
Map Units |
Datum |
State Plane Coordinate System (SPCS)
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Lambert Conformal Conic
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North and South
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Feet
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North American Datum of 1983 |
The City of Winchester’s Coordinate system is in State Plane North Zone NAD83 Feet.
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| How do I obtain GIS data? |
In order to request data or mapping, you can reach the GIS Division at 540-667-1815 ext.1485, send an email to gis@ci.winchester.va.us, or visit at 15 N Cameron St, Winchester Virginia 22601.
All requesters must fill out the GIS User Agreement form before data is delivered.
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