2009 Capitol Region Council of Governments (CRCOG) Orthophotography is very high resolution, color, leaf off, aerial photography that covers the entire Capitol Region and the Town of Plainville, Connecticut. The coverage area includes the following municipalities in Connecticut - Andover, Avon, Bloomfield, Bolton, Canton, East Granby, East Hartford, East Windsor, Ellington, Enfield, Farmington, Glastonbury, Granby, Hartford, Hebron, Manchester, Marlborough, Newington, Plainville, Rocky Hill, Simsbury, Somers, South Windsor, Suffield, Tolland, Vernon, West Hartford, Wethersfield, Windsor, and Windsor Locks. The ground resolution is 3 inches (0.25 ft) per image pixel and the date of the photography is Spring 2009. The orthophotography is intended to support mapping at 1:1,200 scale (1 inch = 100 feet).
In 2008, the Capitol Region Council of Governments received approval for a Regional Performance Initiative (RPI) grant from the Connecticut Office of Policy and Management to acquire orthophotography. The RPI grants are designed to take advantage of economies of scale that can be realized by regional cooperation and coordination of projects in Connecticut. The RPI grant funded the aquisition of 2009 orthophotogy for the entire Capitol Region and the Town of Plainville, for a total of 30 municipalities. Several additional municipalities also contracted with the vendor to acquire orthophotography at reduced cost due to the size and coordination of the flight. The project was managed by CRCOG, with generous assistance from municipal GIS professionals in the region. In particular, the task of reviewing the quality of the orthophotography produced by the vendor was completed by CRCOG staff and these municipal GIS professionals. This particular aerial survey of color, leaf off, 3 inch pixel resolution orthophotography provides the ability to map a comprehensive set of detailed planimetric data that includes roads, sidewalks, streets, highways, and alleys including curb lines, edge of paved surfaces or edge of traveled way, utility poles, street signs, highway lane and traffic safety markings, and general feature details as building footprints, decks, pools, reservoirs, tanks, docks, piers, airports, bridges, overpasses, underpasses, railroads, parking lots, driveways, other impervious surfaces, streams, lakes, drainage courses, holding basins, shorelines, other watercourses, vegetation outlines, fence lines, drainage, and other similar construction or terrain features. This is ideal for identifying features on the ground surface in developed, open, and even wooded areas because leaves on trees and shrubs that normally obstruct the view from above are largely absent. For example, features such as stone walls, dirt roads, and other structures in wooded areas are usually visible and identifiable. Areas of deciduous verses coniferous trees are apparent.
ground condition
There is no guarantee of warranty concerning the accuracy of the data. Users should be aware that temporal changes may have occurred since this data set was collected and that some parts of this data may no longer represent actual surface conditions. Users should not use this data for critical applications without a full awareness of its limitations. Acknowledgement of the originating agencies would be appreciated in products derived from these data. Any user who modifies the data is obligated to describe the types of modifications they perform. User specifically agrees not to misrepresent the data, nor to imply that changes made were approved or endorsed by the Captitol Region Council of Governments.
241 Main Street
WSP SELLS, Inc. was contracted to provide the 2009 Orthophotography.
ASPRS Class I
ASPRS Class 1. The orthophotography is intended to support mapping at 1:1,200 scale (1 inch = 100 feet).
Ultra Cam X
Using ESRI ArcGIS 9.3.1 software, an empty raster dataset was created and subsequently populated with input rasters to create a raster mosaic. The State of Connecticut, Department of Environmental Protection obtained these TIFF images from the Capitol Region Council of Governments. STEP 1 - Create Raster Dataset - The Coordinate System for the raster dataset is NAD_1983_StatePlane_Connecticut_FIPS_0600_Feet. The image compression type is JPEG with a compression quality of 25. The Pyramid Reference Point X and Y coordinate are 687800 and 1015180, respectively. Bands: 3. Pyramids: 8 Bilinear. The Pixel Type is 8_BIT_UNSIGNED, which supports index values from 0 to 255. Raster statistics were not built. Below is a record of the ESRI Geoprocessing CreateRasterDataset command and arguments that created the empty raster dataset. CreateRasterDataset C:\Connecticut_Ortho_2009_CRCOG.gdb Ortho_2009_Color_CRCOG # 8_BIT_UNSIGNED PROJCS['NAD_1983_StatePlane_Connecticut_FIPS_0600_Feet', GEOGCS['GCS_North_American_1983', DATUM['D_North_American_1983', SPHEROID['GRS_1980',6378137.0,298.257222101]], PRIMEM['Greenwich',0.0], UNIT['Degree',0.0174532925199433]], PROJECTION['Lambert_Conformal_Conic'], PARAMETER['False_Easting',999999.999996], PARAMETER['False_Northing',499999.999998], PARAMETER['Central_Meridian',-72.75], PARAMETER['Standard_Parallel_1',41.2], PARAMETER['Standard_Parallel_2',41.86666666666667], PARAMETER['Latitude_Of_Origin',40.83333333333334], UNIT['Foot_US',0.3048006096012192]] 3 # "PYRAMIDS 8 BILINEAR" "128 128" "JPEG 25" "687800 1015180" C:\Connecticut_Ortho_2009_CRCOG.gdb\Ortho_2009_Color_CRCOG STEP 2 - Mosaic input rasters. The Ignore Background Value was not set. The NoData value was left blank. The Mosaicking Tolerance value was set to zero (0). Consequently, pixel values in the raster mosaic resulted from a resampling of pixels values from individual input rasters due to the difference in alignment of input and mosaic (target) pixels. Below is an example of a mosaic of one GeoTiff. Mosaic F:\CRCOG_Orthos\All\772510775.TIF; F:\CRCOG_Orthos\All\772510825.TIF C:\Connecticut_Ortho_2009_CRCOG.gdb\Ortho_2009_Color_CRCOG LAST FIRST # # NONE 0 C:\Connecticut_Ortho_2009_CRCOG.gdb\Ortho_2009_Color_CRCOG NONE
79 Elm Street
241 Main Street