Dynamic Segmentation is an aspect of geographic information
systems (GIS) that provides the most bang for the buck when a
transportation agency is deploying a GIS. The implementation of
"Dyn Seg" in your GIS is probably the critical link between
a successful GIS and the (too common) GIS that fell short of the owner's
expectations.
Key Components
Route systems assemble the arc component of your GIS network into extended
paths of travel. Once a route system is established and populated with
route measures, events can be registered along the route
Event tables are the contemporary manifestation of your database as a
spatial map. An event table is a database that is fitted with spatial
attributes that are recognized by the linear referencing system.
gisworks.com deploys a trio of library tables to complement the coverage
route system. The Intersection, Lookup, and Range tables give remote
users and non-GIS applications the ability to register events to spatial
locations.
Capabilities
GISworks.com provides intuitive designs to maximize the efficiency of
your linear referencing system.
Auxiliary Theme Integration
Linear referencing systems by GISworks.com provide the end-user with
a multi-modal transportation referencing system. That is, events
can be referenced to a road at the location of a river or railway (or
even a political boundary). But the river or railway doesn't
have to exist in the roadway centerline file.
LRS Geocoding - Map Basis
Longstanding manual techniques always involved marking a "crash
location" as a push-pin, or a "work zone segment" with
Zip-Tape. GISworks.com provides "electronic push-pin"
and "electronic zip-tape" as means of registering the same
legacy information in a modern application.
LRS Geocoding - Tabular and Object Basis
While "map-based" geocoding is highly intuitive and
interactively returns a GIS object to represent an event, many geocode
users need the ability to geocode in bulk and don't require the more
costly map-based solution. GISworks.com provides Microsoft
Office and Visual Basic objects for registering spatial databases to
their linear referencing schema.
Reference Examples
Arizona - ATIS Roads Centerline Update Project
Installation and development of tools for upkeep of robust
referencing system that combines linear roadway, hydrographic, and
railway features with polygonal jurisdiction or air quality boundaries
as well as reference points (mileposts) and points of interest.
National Park Service - Mesa Verde Linear Referencing
Demonstration
Demonstrated ATIS concept applied to GPS traces collected as part of
a safety inventory study.
Michigan - Framework Linear Referencing Demonstration
Demonstrated ATIS concept applied to Mecosta County linear features
coverage.
Arizona - Database Geocoding Projects (various)
Multiple types of tools apply sequential lookup operations to reduce
the trio of tables (intersection, lookup, and range) into linear
measures along routes.
