Description: This dataset was created as a cartographic backdrop as well as for any analysis that requires railroads locations. The railroads were originally traced off aerial photography taken in April of 2000 using heads up digitizing in ESRI ArcGIS and later revised using photography taken in 2005, 2007, 2010, 2012 and 2013. This dataset should satisfy National Map Accuracy Standards for a 1:1200 product.
Description: These street centerlines were developed for a myriad of uses including E-911, as a cartographic base, and for use in spatial analysis.
This coverage should include all public and selected private roads within Lake County, Illinois. Roads are initially entered using recorded documents and then later adjusted using current aerial photography. This dataset should satisfy National Map Accuracy Standards for a 1:1200 product.
These centerlines have been provided to the United States Census Bureau and were used to conflate the TIGER road features for Lake County. The Census Bureau evaluated these centerlines and, based on field survey of 109 intersections, determined that there is a 95% confidence level that the coordinate positions in the centerline dataset fall within 1.9 meters of their true ground position.
The fields PRE_DIR, ST_NAME, ST_TYPE and SUF_DIR are formatted according to United States Postal Service standards.
St_PreMod (type: esriFieldTypeString, alias: Street Name Pre Modifier, SQL Type: sqlTypeOther, length: 15, nullable: true, editable: true)
St_PreDir (type: esriFieldTypeString, alias: Street Name Pre Directional, SQL Type: sqlTypeOther, length: 9, nullable: true, editable: true, Coded Values: [NORTH: NORTH], [SOUTH: SOUTH], [EAST: EAST], ... 5 more ...)
St_PreTyp (type: esriFieldTypeString, alias: Street Name Pre Type, SQL Type: sqlTypeOther, length: 50, nullable: true, editable: true, Coded Values: [ACCESS ROAD: ACCESS ROAD], [ACRES: ACRES], [ALCOVE: ALCOVE], ... 261 more ...)
St_PreSep (type: esriFieldTypeString, alias: Street Name Pre Type Separator, SQL Type: sqlTypeOther, length: 20, nullable: true, editable: true, Coded Values: [OF THE: OF THE], [AT: AT], [DE LAS: DE LAS], ... 6 more ...)
Description: This Trails theme is the result of a collaborative effort by the Lake County Division of Transportation, the Lake County Forest Preserve District, the municipalities of Gurnee, Highland Park, Lake Forest, Libertyville, Lincolnshire, Vernon Hills, and Waukegan among others, and the GIS Division of the Lake County Department of Information Technology.
Note that the trails in this theme are actually constructed, open, in-use trails. This theme does not include any future trail plans or trails under new construction. In addition, trail loops not greater than around 1000 ft were not included (i.e. to avoid isolated playgrounds).
All the geometry has been verified to match the 2014 aerials as much as possible but some areas have been drawn with older aerials when the 2014 tree cover was too dense. Therefore the spatial reference is now in NAD83(NSRS2007) vs HARN to match the 2014 aerials. The intended usage scale for this theme is 1" = 100' or a scale ratio of 1:1200. This specification derives from the scale of the orthophotography used as a reference for the trail line features, for trails not mapped through field GPS data gathering.
The bike, horse, snowmobile, and walking usage types were chosen since we have the most complete information on them. They are blank when information is not available.
The surface types are photo interpreted and have not been field verified.