Client: U.S. Army Corps of Engineers, New Orleans District
GEC, through its multidisciplinary contracts with the New Orleans District, conducted a series of task orders over 5 years to assist East Baton Rouge Parish in its Enterprise GIS implementation. GEC, with the help of its subcontractors, was contracted to:
Conduct a needs analysis and feasibility study
Oracle database design
Conduct a GPS inventory of all drain inlets, manhole covers, lift stations, culverts and fire hydrants
Street centerline creation and attribution
Create a sanitary sewer layer
Create land ownership layer, "PIN" lots for linking to assessor database
Digitize building footprints and pavement edges
Acquire high resolution aerial photography
Development of these data sets involved innovative approaches to coordinate GPS data collection, photogrammetry, digitizing and database attribution. Technicians and analysts worked on-site when needed and utilized bicycles, 4-wheelers and police escorts when needed.
GEC mapped and addressed centerlines for over 19,000 streets using ArcInfo to generate the rough centerlines from the road pavement edges while the addressing was performed in GeoMedia. Streets were attributed with names and address ranges for each block. Sewer, drainage and hydrologic features such as manhole covers, open ditches, culverts and storm sewer openings were mapped to 1-meter accuracy using multiple GPS units in the field and following strict QA/QC guidelines and organization to ensure that all features were mapped accurately. GEC ran 3 multiple GPS crews daily for over 1 year to complete the GPS effort. GEC converted existing CAD drawing of the parish-wide sewer system to a GIS coverage in GeoMedia by importing the existing CAD files, overlaying GPS points of manhole covers and other features and then moving lines representing sewer pipes to their correct position and attributing them.