AirWare On-line Reference Manual
| ||Release Level || 7.0 |
| ||Revision Level ||beta|
| ||Release Date ||2015 03 |
Area sources represent distributed sources of small stacks and chimneys and fugitive emissions.
The default Data Structure and data base
representation of area sources is defined by the object header and the
open list of attributes defined in the HTML OBJECT TEMPLATE.
They can represent
All area sources are OBJECTs and have the standard OBJECT META DATA
associated that include:
- industrial areas or individual enterprises
(possible in combination with one or more point sources
and associated with a plant OBJECT);
- commercial (e.g., gas stations) or residental areas;
- city areas representing diffuse contributions from the transportation
system including both moving and stationary vehicles;
- intersections as "hot spots" of the transportation network
if not covered by appropriate line sources.
- name, short descriptiopn, owner, creation and last modification date
of the data set;
- georeference: symbolic, by a reference point (center of the rectangular
bounding box of the polygon, see below);
- OPTIONAL Hypertext description (with import function);
- Type specific attributes (Descriptors):
- ISIC classification;
- Type (describing a sectoral classification,e.g., commerical, industrial, residential, public, traffic)
- average height;
- total area;
- primary fuel;
- fuel consumption (kg/day)
- an optional link to a contact address for larger objects/buildings.
|DATA SUMMARY: Area sources
|Category (symbolic)||Residential Areas, Airports, Industial Park...
|Year of construction||begin of operations
|Source size (symbolic)||very small, small, medium, large, very large
|Fuel type (symbolic)||list of legal values from the knowledge base
|Fuel consumption average [kg/year]
|Total Area [km2]||(consistency with GIS polygon representation ?
|Average Height [m]
|Emission Data, average [g/s]||NOx, NO,NO2, SO2, PM10, PM2.5, CO, VOC
To import a set of area sources together, the data from a spreadsheet
can be impored directly to the data base, with parallel import of the corresponding
polygon (geometry) data.
- Type specific geometry:
georeference (beyond the symbolic association with a province/county/community
Polygon: the AREA OBJECT has an attribute that defines the NUMBER OF POINTS
in the polygon (one single closed area, no crossing lines, no islands);
In a separate table (AREA_SOURCE_POLYGONS) the coordinates are stored together with the OBJECT ID
in a number indicating the drawing sequence:
- the reference point;
- a circle (defined by the reference point and the radius derived from the total area;
- an arbitrary polygon.
OBJ_ID n X Y
the drawing routine finds N pairs of coordinates X,Y
from n=1 to N and draws the polygon, closing it by connectin N with 1 again.
- Data import: The area source geometry (polygon) can be imported as a CSV text file
in a separate import dialog.
- Source specific temporal scaling factors (for month, day, hour)
- a TABLE of substance specific
average (default) emission values (g/s);
- optional one or more substance (or emission related parameter
such as production volume, energy consumption, etc) specific temporal scaling factors;
An import function supports the import of polygon definition
as shape files from ArcView.
The interactive polygon import dialog includes a browser option on the local client,
and requires the specification of the features ID of the polygon boundaries in the shapefile imported.