Connecticut Routes is a 1:100,000-scale, feature-based layer that includes Interstate Highway, US Route, State Route, and route connectors for Connecticut. It is derived from the Connecticut Route Segments layer, which is based on spatial information from the U.S. Bureau of Census that was published for Connecticut by the University of Connecticut, Center for Geographic Information and Analysis. The spatial information (line feature geometry) from the U.S. Bueau of Census was compiled for the year 2000 and used to create a continuous line feature for each interstate highway and route shown on the State Tourism Map 2002-2003 published by the Connecticut Department of Transportation. The Connecticut Routes layer does not include local roads, highway entrance and exit ramps, highway rest areas, exit numbers, house address, traffic direction, or traffic volume information. Features are linear and represent divided and undivided route centerlines mapped at 1:100,000 scale (1 inch = 1.578 mile).
Connecticut Routes layer is used to cartographically represent individual routes on a map with line symbology that classifies routes by type and with label symbology that places highway and route number shields along each route. Display the Connecticut Routes layer with the Connecticut Street Network State Plane, TIGER/Line 2000 layer to depict routes (with highway and route number shields) and local roads (with street names) on a map. The Connecticut Street Network State Plane, TIGER/Line 2000 layer was compiled and published by the University of Connecticut, Center for Geographic Information and Analysis and is also based on information from the U.S. Bureau of Census.
Each route is a continuous line feature that is the result of merging (appending) line features from the Connecticut Route Segments layer. The ArcView 3.3 Avenue Script that creates the Connecticut Routes shapefile from the Connecticut Route Segments shapefile is named zViewMakeRoutes.txt and is included with the Connecticut Route Segments shapefiile download from the State of Connecticut, Department of Environmental Protection Website. This script merges all linear segments that comprise each route in the Connecticut Route Segments shapefile into a single, continuous linear feature for the Connecticut Routes shapefile.
ground condition
None. There are no restrictions or legal prerequisites for using the data. Once acquired, any modification made to the data must be noted in the metadata. When printing this information on a map or using it in a software application, please acknowledge the State of Connecticut, Department of Environmental Protection; University of Connecticut, Center for Geographic Information Analysis; and U.S. Bureau of Census as the original source for this information. For example, include the following data source description when printing this layer on a map: Roads - From the Connecticut Routes layer, compiled and published by CT DEP, UCONN and Census. Source map scale is 1:100,000.
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The Connecticut Routes layer is derived from the Connecticut Route Segments layer, which is based on information from the Connecticut Street Network State Plane, TIGER/Line 2000 layer. The Connecticut Routes Segments layer is derived from the Connecticut Street Network State Plane, TIGER/Line 2000 layer, which was compiled and published by Ellen Cromley and Richard Mrozinski from the University of Connecticut, Center for Geographic Information and Analysis and is based on information from the U.S. Bureau of Census.
The Connecticut Routes retains the accuracy of the attribute information from the source layer and is comprised of four basic feature types: Interstate Highways, U.S. Routes, State Routes, and route connectors. Each line feature describes an entire route. Each route includes five attributes: ROUTE, ROUTECLASS, ROUTENO, ROUTENAME, and SCALELEVEL. For example, ROUTE="Interstate 95", ROUTECLASS="Interstate", ROUTENO="95", ROUTENAME="", and SCALELEVEL="1" are attribute values for the Interstate Highway 95 line feature. Values are within defined domains. The accuracy test for ROUTE, ROUTECLASS, ROUTENO, and ROUTENAME attributes was conducted during the creation of the source layer (Connecticut Route Segments) by comparing the routes as they are published on the Connecticut State Tourism Map 2002-2003 with interactive displays of the routes segments on a computer graphic system. Each route was individually tested by visually inspecting and comparing its geometry in relation to road features in the Connecticut Street Network State Plane, TIGER/Line 2000 layer. Each route was highlighted in color and followed from end to end. Several tests were made to compare, edit and verify CLASS and ROUTE attribute values in the Connecticut Route Segments layer. These attributes were programmatically copied and automatically incorporated into the Connecticut Routes layer by the ArcView 3.3 Avenue script that creates the Connecticut Routes layer. Attribute values were not manually entered in the Connecticut Routes layer.
Line features conform to the following topological rules. Lines are multi-part so that sections of divided and undivided highways are represented as a single line part or two parallel line parts of the same line feature, respectively. Lines do not self overlap. Lines overlap other lines where routes merge along the same stretch of roadway so that route number shields can be automatically labeled and placed for all routes that share the same geometry. Lines also overlap other lines where routes cross at road intersections. For cartographic purposes, lines overlap in the following hierarchical order: Interstates overlap U.S. Routes, U.S. Routes overlap State Routes, and State Routes overlap route connectors. Lines do not intersect, and all nodes anchor the ends of lines. Lines do not overshoot or undershoot other lines they are supposed to meet. The tests of logical consistency for the Connecticut Routes layer were performed by the State of Connecticut, Department of Environmental Protection using ArcView 3.3 software and an Avenue Script named zViewMakeRoutes.txt that processes features from the Connecticut Route Segments layer. The tests of logical consistency for the Connecticut Route Segments layer were performed by the State of Connecticut, Department of Environmental Protection using ESRI ArcInfo software to maintain feature topology in ArcInfo coverage format. For additional information, refer to the Logistical Consistency Report for the Connecticut Route Segments layer. Due to the topology verification process, there may be minor differences in feature geometry between certain features in this layer and the original data source from the University of Connecticut, Center for Center for Geographic Information and Analysis.
The completeness of the data reflects the content of Connecticut State Tourism Map 2002-2003 published by the Connecticut Department of Transportation. This layer includes all highways and routes depicted on the Connecticut State Tourism map, with feature geometry based on information from the U.S Bureau of Census that was published for Connecticut by the University of Connecticut, Center for Geographic Information and Analysis. This data does not include local roads, interstate highway entrance ramps, exit ramps, exit numbers, rest areas. This data is not updated.
The horizonal positional accuracy of this data is no better than United States National Map Accuracy Standards for 1:100,000-scale maps . According to this standard, not more than 10 percent of the points tested are to be in error by more than 1/50 inch (167 feet) measured on the publication scale of a USGS 1:100,000-scale topographic map. The following description of horizontal accuracy is taken from the metadata for the original data source for the Connecticut Routes layer, which is the Connecticut Street Network State Plane, TIGER/Line 2000 layer. It cautions against using these data for measurement and detailed, large scale mapping purposes.The information presented in these files is provided for the purposes of statistical analysis and census operations only. Coordinates in the TIGER/Line files have six implied decimal places, but the positional accuracy of these coordinates is not as great as the six decimal places suggest. The positional accuracy varies with the source materials used, but generally the information is no better than the established national map Accuracy standards for 1:100,000-scale maps from the U.S. Geological Survey (USGS); thus it is NOT suitable for high-precision measurement applications such as engineering problems, property transfers, or other uses that might require highly accurate measurements of the earth's surface. The USGS 1:100,000-scale maps met national map accuracy standards and use coordinates defined by the North American Datum, 1983. For the contiguous 48 States, the cartographic fidelity of most of the Census 2000 TIGER/Line files, in areas outside the 1980 census Geographic Base File/Dual Independent map Encoding (GBF/DIME) file coverage and selected other large metropolitan areas, compare favorably with the USGS 1:100,000-scale maps. The Census Bureau cannot specify the accuracy of features inside of what was the 1980 GBF/DIME-File coverage or selected metropolitan areas. The Census Bureau added updates to the TIGER/Line files that enumerators annotated on maps sheets prepared from the Census TIGER data base as they attempted to traverse every street feature shown on the Census 2000 map sheets; the Census Bureau also made other corrections from updated map sheets supplied by local participants for Census Bureau programs. The locational accuracy of these updates is of unknown quality. In addition to the Federal, State, and local sources, portions of the files may contain information obtained in part from maps and other materials prepared by private companies. Despite the fact the TIGER/Line data positional accuracy is not as high as the coordinate values imply, the six-decimal place precision is useful when producing maps. The precision allows features that are next to each other on the ground to be placed in the correct position, on the map, relative to each other, without overlap.
The geometry and attributes of all features in this data source are used to create the Connecticut Routes layer. Routesegments.shp is in Shapefile format.
These are the features in the Connecticut Routes layer. Routes.shp is in Shapefile format.
These are the features in the Connecticut Routes layer. Routes is in GeoDatabase Feature Class format.
Create Connecticut Routes layer - The automated process for creating (deriving) the Connecticut Routes layer from the Connecticut Route Segments layer is documented in an ArcView 3.3 Avenue script named zViewMakeRoutes.txt, which is included with the Connecticut Route Segments shapefile download at http://www.dep.state.ct.us/gis. This script creates a shapefile named routes.shp based on information from the routesegments.shp shapefile. This script creates a single, continuous linear feature for each route by merging (appending) linear features that define the sections or shorter segments for each route from the Connecticut Route Segments layer. This script assigns route class and route number attribute values based on information from the Route Segments layer. Also, Scale Level values of 1, 2 or 3 are assigned to each route base on information that is hard coded in the zViewMakeRoutes.txt file.
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Added 3 more values to the ScaleLevel attribute by expanding the domain range from 1-3 to 1-6 in order to more finely select routes for display at smaller map scales. Routes were reassigned ScaleLevel values and are now organized into more ScaleLevel categories with fewer features in each. Feature geometry was not edited or updated. This process step resulted in creating the 2006 edition of the Routes layer.
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Convert to GeoDatabase Feature Class format - Defined new Feature Class named Routes; and imported the attribute definitions, loaded features and imported metadata from Routes.shp shapefile. Spatial Reference Properties for Feature Class: Coordinate System: NAD_1983_StatePlane_Connecticut_FIPS_0600_Feet XY Domain MinX: 100000; MaxX: 2247483.645 XY Domain MinY: 200000; MaxY: 2347483.645 Precision: 1000
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Internal feature number.
ESRI
Feature geometry.
ESRI
The common name for the route or connector. For routes, this attribute is based on the ROUTECLASS and ROUTENO attribute values, which are combined into a single value such as "Interstate 95", "US Route 1", and "State Route 2". For connectors, this attribute value is the same as (is based on) the ROUTENAME attribute value such as "Bradley International Airport Connector".
State of Connecticut, Department of Environmental Protection
Route Class
State of Connecticut, Department of Environmental Protection
For connectors with name values in the ROUTENAME field.
CT DEP, CT DOT
For Interstates such as Interstate 84.
CT DEP, CT DOT
For State Routes such as State Route 3.
CT DEP, CT DOT
For US Routes such as US Route 1A.
CT DEP, CT DOT
Route Number, represented as a string.
State of Connecticut, Department of Environmental Protection
Route Name if route is a connector.
State of Connecticut, Department of Environmental Protection
Bradley International Airport Connector
CT DEP, CT DOT
Branford Connector
CT DEP, CT DOT
Hammonasset Connector
CT DEP, CT DOT
Milford Parkway
CT DEP, CT DOT
Montville Connector
CT DEP, CT DOT
Rocky Neck Connector
CT DEP, CT DOT
Route 6 Connector
CT DEP, CT DOT
Route 9 Connector
CT DEP, CT DOT
Sherwood Island Connector
CT DEP, CT DOT
Wharton Brook Connector
CT DEP, CT DOT
Scale Level. A numeric value that organizes routes into groups that are appropriate for display at different map scales. Also, use the SCALELEVEL attribute to define a layer or theme of routes appropriate for display at different scales. There are 6 scale levels. For example, when displaying routes between 1:1,500,000 and 1:500,001 scale, set the layer definition query to SCALELEVEL = 1; between 1:500,000 and 1:200,001 scale, set the layer definition query to SCALELEVEL <= 2; between 1:200,000 and 1:100,001 scale, set the layer definition query to SCALELEVEL <= 3; between 1:100,000 and 1:50,001 scale, set the layer definition query to SCALELEVEL <= 4; for larger than 1:50,001 scale, set the layer definition query to SCALELEVEL <= 5; and for larger than 24,001 scale, set the layer definition query to SCALELEVEL <= 6.
State of Connecticut, Department of Environmental Protection
Scale Level 1 - Routes selected for display on very small scale maps at scale ranges between 1:1,500,000 and 1:500,001. To display this set of routes on a map, set the layer definition query to SCALELEVEL = 1. Scale Level 1 includes Interstate 84, Interstate 91, Interstate 95, Interstate 291, Interstate 395, and Interstate 691.
CT DEP
Scale Level 2 - Routes selected for display with Scale Level 1 routes on very small maps at scale ranges between 1:1,500,000 and 1:200,001. To display this set of routes on a map, set the layer definition query to SCALELEVEL <= 2. Scale Level 2 includes Interstate 384, Interstate 684, State Route 2, US Route 7, State Route 8, State Route 9, and State Route 15.
CT DEP
Scale Level 3 - Routes selected for display with Scale Level 1 and 2 routes on small scale maps at scale ranges between 1:200,000 and 1:100,001. To display this set of routes on a map, set the layer definition query to SCALELEVEL <= 3. Scale Level 3 includes US Route 1, US Route 5, US Route 6, US Route 44, and US Route 202.
CT DEP
Scale Level 4 - Routes selected for display with Scale Level 1 2, and 3 routes on medium scale maps at scale ranges between 1:100,000 and 1:50,001. To display this set of routes on a map, set the layer definition query to SCALELEVEL <= 4. Scale Level 4 includes US Route 1A, State Route 2A, State Route 4, State Route 10, State Route 11, State Route 12, State Route 14, State Route 14A, State Route 17, State Route 20, State Route 25, State Route 30, State Route 32, State Route 34, State Route 39, State Route 41, State Route 49, State Route 53, State Route 55, State Route 58, State Route 63, State Route 66, State Route 67, State Route 72, State Route 74, State Route 75, State Route 77, State Route 80, State Route 81, State Route 82, State Route 85, State Route 97, State Route 124, State Route 137, State Route 138, State Route 140, State Route 154, State Route 156, State Route 159, State Route 163, State Route 165, State Route 169, State Route 171, State Route 187, State Route 189, State Route 190, State Route 194, State Route 195, State Route 198, State Route 207, State Route 216, State Route 244, State Route 262, State Route 302, and State Route 343.
CT DEP
Scale Level 5 - Routes selected for display with Scale Level 1, 2, 3 and 4 routes on larger scale maps at scales larger than 1:50,001. To display this set of routes on a map, set the layer definition query to SCALELEVEL <= 5. Scale Level 5 includes State Route 3, State Route 16, State Route 19, State Route 21, State Route 22, State Route 27, State Route 31, State Route 33, State Route 35, State Route 37, State Route 40, State Route 42, State Route 43, State Route 45, State Route 47, State Route 57, State Route 59, State Route 61, State Route 64, State Route 68, State Route 69, State Route 70, State Route 71, State Route 71A, State Route 73, State Route 78, State Route 79, State Route 83, State Route 835, State Route 87, State Route 89, State Route 94, State Route 99, State Route 100, State Route 101, State Route 102, State Route 103, State Route 104, State Route 106, State Route 107, State Route 108, State Route 109, State Route 110, State Route 111, State Route 112, State Route 113, State Route 114, State Route 115, State Route 116, State Route 117, State Route 118, State Route 120, State Route 121, State Route 122, State Route 123, State Route 125, State Route 126, State Route 127, State Route 128, State Route 130, State Route 131, State Route 132, State Route 133, State Route 135, State Route 136, State Route 139, State Route 142, State Route 145, State Route 146, State Route 147, State Route 148, State Route 149, State Route 150, State Route 151, State Route 152, State Route 153, State Route 155, State Route 157, State Route 160, State Route 161, State Route 162, State Route 164, State Route 166, State Route 167, State Route 168, State Route 172, State Route 173, State Route 174, State Route 175, State Route 176, State Route 177, State Route 178, State Route 179, State Route 17A, State Route 181, State Route 182, State Route 182A, State Route 183, State Route 184, State Route 185, State Route 186, State Route 188, State Route 191, State Route 192, State Route 193, State Route 196, State Route 197, State Route 199, State Route 200, State Route 201, State Route 203, State Route 205, State Route 209, State Route 213, State Route 214, State Route 215, State Route 217, State Route 218, State Route 219, State Route 220, State Route 222, State Route 229, State Route 234, State Route 243, State Route 254, State Route 263, State Route 272, State Route 275, State Route 286, State Route 287, State Route 289, State Route 305, State Route 309, State Route 313, State Route 314, State Route 315, State Route 316, State Route 317, State Route 318, State Route 319, State Route 320, State Route 322, State Route 334, State Route 337, State Route 341, State Route 349, State Route 354, State Route 361, State Route 364, and State Route 372.
CT DEP
Scale Level 6 - Routes selected for display with Scale Level 1, 2, 3, 4 and 5 routes on maps at scales larger than 1:24,001. To display this set of routes on a map, set the layer definition query to SCALELEVEL <= 6. Scale Level 6 includes Bradley International Airport Connector, Branford Connector, Hammonasset Connector, Milford Parkway, Montville Connector, Rocky Neck Connector, Route 6 Connector, Route 9 Connector, Sherwood Island Connector, and Wharton Brook Connector.
CT DEP
Includes linear route features such as highways, routes, and connectors. Information encoded about features includes route class and number. Use the ROUTECLASS attribute to symbolize routes by type. Use the ROUTENO attribute to label routes with interstate highway and route number shields. For labeling Interstate highways, query for ROUTECLASS="Interstate" and label the features with the ROUTENO attribute using an interstate highway shield symbol. For labeling US Routes, query for ROUTECLASS="US Routes" and label the features with the ROUTENO attribute using a US Route shield symbol. For labeling State Routes, query for ROUTECLASS="State Route" and label these features with the ROUTENO attribute using a State Route shield symbol. Also, use the SCALELEVEL attribute to define a layer or theme of routes appropriate for display at different scales. There are 6 scale levels. For example, when displaying routes between 1:1,500,000 and 1:500,001 scale, set the layer definition query to SCALELEVEL = 1; between 1:500,000 and 1:200,001 scale, set the layer definition query to SCALELEVEL <= 2; between 1:200,000 and 1:100,001 scale, set the layer definition query to SCALELEVEL <= 3; between 1:100,000 and 1:50,001 scale, set the layer definition query to SCALELEVEL <= 4; for larger than 1:50,001 scale, set the layer definition query to SCALELEVEL <= 5; and for larger than 24,001 scale, set the layer definition query to SCALELEVEL <= 6.
Other than the metadata for the Routesegments layer, the information in this metadata document is the only reference that describes the Connecticut Routes entities and attributes.
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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.
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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