 | Do you have mapping data available on your web site?
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| The only maps currently available for download from Frederick County's web site are in image, .pdf or .jpg format. The GIS Division is about to release an interactive mapping system to the public via ArcIMS on the County's website. This interactive mapping will allow users to access, query, and print maps produced from the County GIS data without having to purchase or load GIS software on their personal computer. |
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Do you sell index maps of Frederick County?
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| A 33" x 44" wall-sized index map of Frederick County is avaliable for purchase through the GIS Division. This map provides an index of tax maps, major roads, zoning, agricultural districts, and the Urban Development Area. See the Products and Services Section of this web site for details. |
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Do you sell wall maps of Frederick County?
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| Maps of various sizes with a maximum of 33" x 44" can be produced by the GIS Division on any information that is currently available. Any maps that require data generation fall under FOI (Freedom of Information) and require an additional production cost for staff time. See the Products and Services Section of this web site for details. |
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Do you have aerial photography?
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| The Department of Planning and Development's archives contain; film positives of the whole County 1" = 3000' from 1970. produced by the Virginia Department of Highways; a set of 1" = 600' scale film positives for 1981; and a set of 1" = 600' scale film positives for 1988.
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Do you have ditigial Orthophotography?
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| In 2001, the County contracted for and had flown a set of digital orthophotos for the entire County at a map scale of 1" = 200'. These digial orthos are available to the public in an uncompressed TIFF format or a compressed Mr. SID format. See the Products and Services Section of the Frederick County GIS webpages for details. |
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Do you have contour or topological information for Frederick County?
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| The County currently has five foot interval contour mapping of the entire county. This data is broken up into the same tile system as the digital orthophography, in 5000' by 5000' blocks. The data is available in .dwg, .dxf, and shape file. A shape file of the contour data for the entire county at a twenty-five foor contour interval is available in shapefile format. |
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Do you sell parcel or property maps? Tax maps?
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| Individual tax maps at a scale of 1" = 600' can be purchased from the following agencies: GIS, Planning and Development, and Commissioner of Revenue/Real Estate. The County is divided into 94 of these tax maps. An index can be made available upon request. See the Products and Services Section of this web site for details. |
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Do you have and/or sell a street guide book of Frederick County?
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| A street guide book for the county is not available at this time. The most comprehensive commercial book is available from the ADC company. The county has plans for a new street guide book, however, key components of the data are currently under revision. |
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What kind of file formats are available for Frederick County data?
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What kind of software do I need to view your data?
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The majority of the County's data is provided as Arc Shape files - and therefore ArcView, ArcExplore, or ArcInfo...or a program that reads .shp files. Some of the newer CAD packages will also read .shp format.
ArcExplore, a shareware. shp reader can be downloaded for free from the ESRI site. |
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How was your data created?
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Initially the tax mapping base data was created by the digitizing U.S.G.S. quadrangles and dividing them down to the 1" = 600' tax map scale. Parcel informatioon from the state drawn tax maps was then "rubber-sheeted
to fit/ Additional data was digitized into this format and other sources of data from the state and federal governments were imported and broken down to the base scale level.
Over the past years, the County invested in a new mapping set. Digital orthophotography was flown in the spring of 2001 and new planimetric data sets were drawn. These planimetric data sets include hydrology (lakes and streams), hypsography (contour dn topography lines), buildings, roads, parcels and many other themes. Serveral of these themes and layers are being customized and updated up fit the County's new NAD 83 State Plane Virginia North data set. |
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What is the map projection for your data?
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| The current data is NAD 83 State Plane Virginia North. |
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What types of mapping data are available for Frederick County?
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| Frederick County GIS has the standard gambit of land data: parcels, soils, wetlands, landmarks survey, historic districts, zoning, land use, etc. For more details, look in the FCGIS Data Section of the GIS web page. |
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Do you have GPS capability?
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| The department of Information Techonologies GIS Division and Planning/Development have Trimble CE GPS units and conduct field work as required to complete generation of specific requests. |
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What kind of GIS software do you use?
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| The GIS users in the Frederick County system rely on ESRI Arc products for map product generation. The County maintains a centralized set of Arc software including ArcInfo, ArcGIS, Spatial Analyst, Network Analyst, ArcPaint, ArcPad, and ArcMaplex. ArcIMS and Freeance are being used to produce and manage the new interactive web mapping system. |
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What kinds of historical information do you have?
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A Historical Landmarks survey was completed by Maral Kalbian through the Winchester-Frederick County Historical Society in 1992. GIS mainrains a shape file that shows the location of each structure 50 years and older with the record number associated to the files in the Handley Library Archives.
Six of the 16 American Civil War battlefields in the Shenandoah Valley are in Frederick County. The National Park Service did an extensive survey of these battlefields. GIS has a shape file of the core study areas designated by the NPS as areas of preservation concern. |
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How often is your data updated?
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| We do not produce paper copy or cut digital cd's until we recieve a request. The data is maintained daily. Parcel information is downloaded from the Real Estate CAMRA file daily and new structure numbers and addressing are added practically every day. Therefore, ArcGIS information is current to the date it was produced in its deliverable form. |
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