Client: City of Memphis
Project: Storm Water Digitization
The City of Memphis’ storm water infrastructure was digitized from over 100,000 scanned engineering drawings that were first geo-located by CAESER in one of our largest data migration efforts. Using versioned geodatabase architecture, the City’s 100-year-old storm water system was puzzled together into a massive network of pipes, manholes, headwalls, open channels and other structures over an eight-year period.
Each structure is hyperlinked to the primary engineering drawing used to digitize the feature, thereby maintaining a linkage between the new GIS storm water system and the legacy data. A robust QAQC process ensures that errors are minimized. The City of Memphis is distributing the GIS storm water network created by CAESER to numerous engineering firms that will field validate infrastructure placement and elevations on pipes 24-inch-diameter and larger for the purpose of modeling and flood prevention.
CAESER will continue to assist the City in their effort to create an accurate storm water infrastructure in GIS. CAESER is assisting some of the engineering firms conducting the field surveys, but is also reintegrating the engineering firms’ corrections back into the original GIS storm water layers whilst ensuring compatibility with InfoSWMM, the modeling package being used to reduce localized flooding and protect citizen’s property from flooding damage.
A beneficial byproduct of this effort is the easy accessibility to the 100,000 engineering drawings that once took between 3 and 4 hours to fulfill a request for access. With the plans in a digital format and tied to a specific location, City officials can respond within minutes to drawing requests.