Connecticut 2004 Coastal Orthophoto Tile Index is a polygon feature class that defines the (rectangular) geographic area covered by each Connecticut 2004 coastal orthophoto image tile. The 2004 orthophoto data for Connecticut is comprised of 98 orthophoto tiles corresponding to the USGS 3.75 minute quarter quad grid for Connecticut. These data include a tile footprint polygon feature for each orthophoto based quarter quad in the extent of the project area. Each polygon feature is identified by a unique TILECODE value, which matches the filename of the corresponding digital orthophoto tile. All tiles also include basic information on the flight including the year, photography type, tide control, vegetation state, scale, etc.
Orthophoto tile footprint. One polygon feature per orthophoto tile covering the project area as defined in the abstract. (Source: State of Connecticut, Department of Environmental Protection)
Internal feature number. (Source: ESRI)
Feature geometry. (Source: ESRI)
These data serve as a polygon index to the set of 2004 coastal orthophoto image tiles for Connecticut.
All attributes have valid values. Values are within defined domains. No rigid attribute accuracy tests were conducted. However, assignment of quadrangle number, quadrangle name, and quadrangle section values were conducted through spatial joins with previously quality checked quadrangle and quarter quadrangle index spatial data, followed by a visual inspection for expected results to ensure overall accuracy.
The horizontal positional accuracy of this data complies with the United States National Map Accuracy Standards for 1:24,000 scale maps. According to this standard, not more than 10 percent of the locations tested are to be in error by more than 1/50 inch (40 feet) measured on the publication scale of a USGS 7.5 minute topographic quadrangle map.
The completeness of the data reflects the feature content of the data sources, which were mosaic of the 2004 coastal orthophotos and a tile index of USGS Quarter Quad index tiles created by the State of Connecticut Department of Environmental Protection.
None. No restrictions or legal prerequisites for accessing the data. The data is in the public domain and may be redistributed.
Although these data have been used by the State of Connecticut no warranty, expressed or implied, is made by the State of Connecticut as to the accuracy of the data and or related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the State of Connecticut in the use of these data or related materials. The user assumes the entire risk related to the use of these data. Once the data is distributed to the user, modifications made to the data by the user should be noted in the metadata.
| Data format: | in format Shapefile, Feature Class (version ArcGIS) |
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| Network links: | http://www.ct.gov/deep |
The data distributor does not provide custom GIS analysis or mapping services. Data is available in a standard format and may be converted to other formats, projections, coordinate systems, or selected for specific geographic regions by the party receiving the data.
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