CDOT-OTIS Online Transportation Information System

A coordinate system is a grid-based method of specifying locations on the surface of the Earth that is a practical application of a 2-dimensional Cartesian coordinate system. (easting)

The Universal Transverse Mercator (UTM) coordinate system is a grid-based method of specifying locations on the surface of the Earth that is a practical application of a 2-dimensional Cartesian coordinate system. It is used to identify locations on the earth, but differs from the traditional method of latitude and longitude in several respects. The UTM system is not a single map projection. The system instead employs a series of sixty zones, each of which is based on a specifically defined secant transverse Mercator projection. A position on the Earth is referenced in the UTM system by the UTM zone, and the easting and northing coordinate pair. The easting is the projected distance of the position from the central meridian, while the northing is the projected distance of the point from the equator. Eastings and northings are measured in meters. The point of origin of each UTM zone is the intersection of the equator and the zones central meridian. In order to avoid dealing with negative numbers, the central meridian of each zone is given a false easting value of 500,000 meters. Thus, anything west of the central meridian will have an easting less than 500,000 meters. For example, UTM eastings range from 167,000 meters to 833,000 meters at the equator (these ranges narrow towards the poles). In the northern hemisphere, positions are measured northward from the equator, which has an initial "northing" value of 0 meters and a maximum "northing" value of approximately 9,328,000 meters at the 84th parallel — the maximum northern extent of the UTM zones. In the southern hemisphere, northings decrease as you go southward from the equator, which is given a "false northing" of 10,000,000 meters so that no point within the zone has a negative northing value.

Title	Type	Description
AnchorOn	Table	The AnchorOn table is a Collection of Inventory Items, Features, Events or Split Point Locations that can be Field Varified and/or could be assigned a Real World Coordinate. Structures, Junctions, Crossings and Intersections are some Examples.
IntchOn	Table	The IntchOn Table and the Interchages Feature Class hold data and geometry for the Major Interchanges on the State Highway System.
IntersectOn	Table	The IntersectOn table is a New Collection that Describes the Node Point where Roadway Objects are Crossing each other - i.e Local-Road Intersections, Highway Junctions, Exits, Rail Roads, Interchanges, River Crossings, Culverts and Structures.
MileGroupsOn	Table	MileGroupsOn is a collection of events to help CDOT understand and manage Mile Marker posting and locations.
RampsOn	Table	The RampsOn table is a Collection of On Ramps and Exit Ramps including a few Design Specifications, a few classicication fields and a few Traffic Volume and Traffic Related items that have a Traffic Count Stations on the State Highway System. *