ARB works closely with local air districts to update and to improve the emission inventory of criteria and toxic air pollutants from point sources and certain areawide sources. The California Emission Inventory Development And Reporting System (CEIDARS) is a relational database hosting the source information and utility information of the emission inventory. For point source emissions, the accurate location information of emission facilities is critical to many ARB programs, such as GIS-based emission inventory, air pollution monitoring, air quality modeling, and the health risk assessment at local and community levels.
Air districts report facility location using various geographic coordinate systems, map projections and datums. To promote consistency and usability of the spatial data in CEIDARS, ARB staff converted facility location data into longitude and latitude under the NAD83/WGS84 datum whenever feasible. For facilities without geo-coordinates, ARB staff populated the longitude and latitude using geocoding methods based on the facility address. In cases where the facility address was not available, the centroid of the facility’s zip code, county or air district was assigned as the facility location. Inaccuracies and errors exist in the spatial data of CEIDARS. A systematic QA/QC check on facility location is both necessary and greatly simplified with the Facility Locator online tool.
Locator is a web-based tool to help air district staff QA facility location
data in CEIDARS. It offers an easy way to query, sort, and search facilities in
CEIDARS, and to locate the facilities on Google Maps based on their geo-coordinates
and street addresses. Facility Locator provides a number of options and measures to QA the facility location data,
including built-in geocoder, point-and-click geo-coordinates generator,
business search engine, and interactive maps of
Step 1. Click on the ‘Facility Locator’ map icon from the GIS-base Emission Inventory System Homepage.
Step 2. Click on a map icon to query facilities by air basin, by air district, or by county.
Step 3. Click on a map area or an area label to query facilities in the area.
Step 4. Sort and browse facility records to find facilities of your interest.
Step 5. Click on the ‘info’ link of a facility record to find the detailed facility information.
Step 6. Click on the ‘map’ link of a facility record to locate the facility on Google Maps.
The red balloon marker() is based the geo-coordinates of the facility, and the blue push-pin marker() is based its street address. If these two markers are far apart from each other, then at least one of them might be wrong. The map scale bar on the lower-left corner can be used as a reference to estimate the distance between these two markers. If the geocoding process failed due to the incomplete or incorrect facility address, find the correct facility address and go to Step 7.
Step 7. Type in the facility address in the ‘Address’ textbox and click