Session 2 Outline Background Aerial Maps USGS Maps Digitized CADD Maps Data base support Background Aerial Maps USGS Maps Digitized CADD Maps Data base support Global Positioning System (GPS) Geographic Information System (GIS) System Mapping Tools

Background Information Stream Channel Stream Channel Drainage Ditch/Swale Drainage Ditch/Swale Highway Lanes Highway Lanes Median Drain Median Drain OEPAs definition of an Outfall. Permit requires outfall to be mapped Background Information Culvert 1 Ditch Confluenc e = Outfall

Aerial Maps Can these be used to locate outfalls? Determine additional uses for inventory- Design, support for other inventories, etc. Level of use- aid in cost estimates for inventory Will this map approach aid with illicit detection? Can these be used to locate outfalls? Determine additional uses for inventory- Design, support for other inventories, etc. Level of use- aid in cost estimates for inventory Will this map approach aid with illicit detection?

USGE Maps

Digitized CADD Maps

Data Base Support Tracking system attribute data Design level support Reporting Evaluation/Assessment Inventory organization and location labeling Tracking system attribute data Design level support Reporting Evaluation/Assessment Inventory organization and location labeling

Global Positioning System - GPS Locate outfalls Latitude/Longitude coordinates – Tie into state plain coordinates Assist in establishing unique outfall labeling system Reporting by location Locate Illicit sources Locate outfalls Latitude/Longitude coordinates – Tie into state plain coordinates Assist in establishing unique outfall labeling system Reporting by location Locate Illicit sources

Geographic Information System-GIS Very flexible Multiple layer coverage's for data analysis Becoming more and more main stream Cost is becoming manageable Very flexible Multiple layer coverage's for data analysis Becoming more and more main stream Cost is becoming manageable

Session 2 Review Background – Outfall Definition Aerial Maps – Best used in combination with digital map USGS Maps – Can use, scale and accuracy an issue, but allowed by permit – Low to medium level of coverage Digitized CADD Maps – Medium to high level of coverage, can begin engineering level activities Data base support – Necessary support for all map types Background – Outfall Definition Aerial Maps – Best used in combination with digital map USGS Maps – Can use, scale and accuracy an issue, but allowed by permit – Low to medium level of coverage Digitized CADD Maps – Medium to high level of coverage, can begin engineering level activities Data base support – Necessary support for all map types Global Positioning System (GPS) – Key for locating outfall Lat/Long data Geographic Information System (GIS) – Becoming tool of choice, High level of coverage, can include engineering level data. System Mapping Tools

Questions and Answers

End of Session 2 Session 3 – Basic Approach for Identifying Illicit Discharges