Geographic Information Systems (GIS)
LLG utilizes state of the art software to create Geographic Information Systems (GIS) that capture, analyze and display spatial data – including natural elements such as elevation and waterways, as well as transportation links and land use information. Data are graphically represented in either vector or raster formats. LLG creates GIS databases using a common index variable that allows for interaction with external systems. All information stored within a GIS can be queried, analyzed and displayed.
LLG works closely with the San Diego Association of Governments (SANDAG) and the County of San Diego GIS Department (SanGIS) to integrate existing geographical data into our GIS, allowing us to create customized maps and reports based on specific project impact studies.
El Cajon, CA
LLG conducted an EIR-Level Traffic Impact Analysis for the El Cajon Downtown Specific Plan. The specific plan area consisted of approximately 541 acres generally within the downtown redevelopment project area. In addition, LLG worked extensively with SANDAG to prepare comprehensive traffic volume forecasting models utilizing ArcGIS tools to alter land use, parcel, and zoning data, and traffic analysis zone database files (.dbf).
La Mesa, CA
LLG was retained by the City of La Mesa to prepare a traffic study for the Mixed-Use Overlay Zone project. A complete existing condition assessment was prepared for the several hundred acre study area. The trip generation for the worst case development per the zoning was determined. The SANDAG traffic model was utilized to determine future traffic volumes with and without the overlay zoning. LLG utilized GIS software to symbolize layer files assigned to parcel data to designate areas of land use rezoning within the project area. An EIR-Level Traffic Impact Analysis was ultimately prepared for the project.
Valley Center, CA
LLG prepared a comprehensive traffic study of the Valley Center Neighborhood Shopping Center project. The project proposed to develop 85,000 SF of retail space. The Valley Center area is unique given there are virtually no retail opportunities in Valley Center itself and most trips must travel to nearby communities. A crucial part of the analysis was to determine the market area that would capture local shopping center patrons. Through LLG’s GIS software capabilities, database (.dbf) files were edited and/or created to forecast these origins and destinations. Land use data was merged with traffic volume data to determine the percentage of project trips that would remain local to Valley Center with the new shopping center development.
National City, CA
LLG prepared a traffic study for the Westside Specific Plan for the City of National City. The project area incorporated a 100-acre neighborhood within the incorporated limits of National City, California. The neighborhood consists of a mix of industrial and residential uses. In order to reduce the conflicts between these land use types, the Westside Specific Plan included strategies to rezone areas which would restrict the allowance of industrial uses near residential; primarily auto body shops and auto repair shops. In order to rezone the proposed land uses within the project area, LLG worked to identify existing Traffic Analysis Zones in the downtown area and then recreate the zone boundaries based on the proposed rezoning of downtown land use parcel data.