The Orthophoto Tile layout depicts the extent of the orthophotos that comprise the 2010 Connecticut Multispectral Coastal Imagery.
The 2010 Connecticut Multispectral Coastal Imagery is 1:12,000-scale, 4-band (red, green, blue, and near infrared) tide controlled imagery taken over 3 distinct days during a June 15 to September 15, 2010 flight window. The imagery can be configured to show either true color or color infrared versions of the coastal landscape. The geographic extent (~320 sq mi) of the photography includes: * all land areas within one-thousand (1000) feet of Mean High Water (MHW) and within one-thousand (1000) feet of state-regulated tidal wetlands; * an area of at least two-thousand (2000) feet waterward of the immediate shoreline of Long Island Sound in order to clearly depict the interface between the shorelands and coastal waters; * all offshore islands within the territorial borders of the State of Connecticut including Goose Island and Falkner Island (offshore of Branford); Calf Islands and Great Captain Island (offshore of Greenwich); Norwalk Islands (offshore of Norwalk); Thimble Islands (offshore of Branford); Sandy Point (offshore of Stonington); and all islands in the Connecticut part of Fishers Island Sound; and * the main stem of the Connecticut River up to the Massachusetts State line. To maximize the quality of the images and their contents, photography also conformed to the following flight specifications: * photos were only taken during times of no/minimal cloud cover when lighting and weather conditions optimized the data collection; * solar altitude was no more than 65 degrees and no less than 30 degrees; * the ground detail was not obscured by flooding; * the foliage (salt marsh vegetation in particular) was fully developed; * seasonal conditions (summer) favored maximum human use/recreation activities (e.g., boats & temporary docks/structures in water, etc.) * photo times were planned within 1 hour window before or after a predicted low tide based on National Oceanic & Atmospheric Administration (NOAA) predicted tide tables. * Forward overlap is 60% and side image overlap is 30% * Crab and Tilt do not exceed 5 degrees. The ground resolution of the imagery is approximately 1ft per pixel. Data is compiled at 1:12,000 scale. This data is not updated.
publication date
Internal feature number. (Source: ESRI)
Feature geometry. (Source: ESRI)
Tile Name (Source: PhotoScience, Inc.)
| Value | Definition |
|---|---|
"CT2010_coastal_<SW corner cords>" with 5 digits from the X and 4 from the Y. CT2010_Coastal_101376284 for example. |
Photoscience, Inc., of Lexington, KY performed the 2010 Connecticut Multispectral Coastal Imagery Project via an MOU between the State of Connecticut Department of Environmental Protection and the NOAA Coastal Services Center as part of the Coastal Geospatial Services Contract (CGSC), a FAR Part 36, Architectural and Engineering Contract vehicle to provide geospatial services.
To identify the name and location/extyent of the orthophotos delivered as part of 2010 Connecticut Multispectral Coastal Imagery.
A version of a CTDEP grid for an aerial flight in 2004, adjusted to cover the project extent of the 2010 flight. Due to issues with the orientation and projecttion this was not able to be directly used, but served as a surrogate to create a comparable version.
Final version of 2010 orthophoto tiles.
The CTDEP grid layout was provided to PhotoScience but during the process an issue was discovered with it. The layout was derived from an other quarter quad layout and the problem is that it produced tiles that were actually trapezoids, instead of rectangles. When PhotoScience ingest that into their software to cut the sheets, it doesn't know how to handle them, so they came up with a new layout, based on the size of the tiles you gave us (5800ft X 7700ft). They also had to slightly move the tiles in order to get them on even coordinates. The same area is being covered, so there is no issue with lost data. Additionally, a naming scheme was delveoped to name the grids by using the convention "CT2010_coastal_<SW corner cords>" with 5 digits from the X and 4 from the Y. CT2010_Coastal_101376284 for example.
The completeness of the data reflects the feature content of the data sources, which include the 2010 Connecticut Multispectral Coastal Imagery.
Verification of logical consistency was performed by the State of Connecticut, Department of Environmental Protection using ESRI ArcGIS software. No automated procedures or tests were performed to guarantee desired topology/completeness other than visual inspection.
No restrictions or legal prerequisites for using the data. The data is suitable for use at appropriate scale, and is not intended for maps printed at scales greater or more detailed than 1:12,000 scale (1 inch = 1,000 feet). Although this data set has been used by the State of Connecticut, Department of Environmental Protection, no warranty, expressed or implied, is made by the State of Connecticut, Department of Environmental Protection 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, Department of Environmental Protection 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. When printing this data on a map or using it in a software application, analysis, or report, please acknowledge the State of Connecticut, Department of Environmental Protection as the source for this information. For example, include the following data source description when printing this layer on a map: "2010 Connecticut Multispectral Coastal Digital Orthophotography, compiled by PhotoScience, Inc. and published by the State of Connecticut, Department of Environmental Protection. Source map scale is 1:12,000."
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The data is in the public domain and may be redistributed. No restrictions or legal prerequisites for using the data. The data is suitable for use at appropriate scale, and is not intended for maps printed at scales greater or more detailed than 1:12,000 scale (1 inch = 1,000 feet). Although this data set has been used by the State of Connecticut, Department of Environmental Protection, no warranty, expressed or implied, is made by the State of Connecticut, Department of Environmental Protection 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, Department of Environmental Protection 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. When printing this data on a map or using it in a software application, analysis, or report, please acknowledge the State of Connecticut, Department of Environmental Protection as the source for this information. For example, include the following data source description when printing this layer on a map: "2010 Connecticut Multispectral Coastal Digital Orthophotography, compiled by PhotoScience, Inc. and published by the State of Connecticut, Department of Environmental Protection. Source map scale is 1:12,000."
| Data format: | Size: 0.076 |
|---|---|
| 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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