The CONCEPT Grid Definition Model requires numerous
parameters in order to build a correct emissions modeling grid. These parameters are stored in the
user-defined run control file for each scenario that is being modeled. Table 1 identifies the parameters in the run
control file that are required by the Grid Definition Model. Column “run_control.txt” identifies the
qualifying field in the user-defined run control file that identifies the
specific parameter (e.g., “GridName” identifies that arbitrary name of the grid
structure that will be created by the Grid Definition Model, and its entry in
the run control file takes the form, for example, “GridName=RPO04”). Column “run_control database” identifies the
name of the field for the specific parameter as it appears in the SQL
table. Column “Data Type” identifies the
cast that the field takes in the SQL table.
Column “Must be specified?” indicates whether the parameter is required. Following Table 1 is a bulleted list of valid
projections that CONCEPT supports and the parameters that are required to drive
the map projection. Column “Description”
provides a brief definition of the specific parameters. Column “Acceptable Values” identifies the
valid values for the parameters.
Table 1. Grid Definition Parameters in RUN_CONTROL.TXT
file
|
run_control.txt |
run_control
database |
Data Type |
Must be
specified? |
Description |
Acceptable
Values |
|
GridName |
grid_name |
C |
yes |
Arbitrary
name of the emissions modeling grid |
|
|
Projection |
grid_projection |
C |
yes |
Map
projection to be used |
UTM,
GEOGRAPHIC, STEREOGRAPHIC, LAMBERT |
|
GridDatum |
grid_datum |
C |
yes |
Map
reference datum |
SPHERE,
WGS84, NAD27, NAD83 |
|
OriginX |
grid_origin_x |
N |
yes |
East-west
origin of the southwest corner of the modeling domain |
|
|
OriginY |
grid_origin_y |
N |
yes |
North-south
origin of the southwest corner of the modeling domain |
|
|
NumXCells |
num_x_cells |
I |
yes |
Number
of grid cells in the east-west
direction |
>
0 |
|
NumYCells |
num_y_cells |
I |
yes |
Number
of grid cells in the north-south direction |
>
0 |
|
XCellSize |
x_cell_size |
N |
yes |
Dimension
of a grid cell in the east-west direction |
>
0 |
|
YCellSize |
y_cell_size |
N |
yes |
Dimension
of a grid cell in the north-south direction |
>
0 |
|
UTMZone |
utm_zone |
I |
no |
UTM
zone |
3
< utm_zone < 22 |
|
Grid1Lat |
grid_lat_1 |
N |
no |
1st
standard parallel for use when GRID_PROJECTION = LAMBERT |
0
< grid_lat_1 < 90 |
|
Grid2Lat |
grid_lat_2 |
N |
no |
2nd
standard parallel for use when GRID_PROJECTION = LAMBERT |
0
< grid_lat_2 < 90 |
|
GridLonOrigin |
grid_lon_origin |
N |
no |
Longitude
of projection origin for use when GRID_PROJECTION = LAMBERT or STEREOGRAPHIC |
-180
< grid_lon_origin < 180 |
|
GridLatOrigin |
grid_lat_origin |
N |
no |
Latitude
of projection origin for use when GRID_PROJECTION = LAMBERT or STEREOGRAPHIC |
0
< grid_lat_origin < 90 |
Valid Map
Projections for CONCEPT
· If ( GRID_PROJECTION = GEOGRAPHIC and GRID_DATUM = SPHERE ) Then
§ specify: -180º < GRID_ORIGIN_X < 180º;
§ specify: -90º < GRID_ORIGIN_Y < 90º; and
§ specify: NUM_X_CELLS, NUM_Y_CELLS, X_CELL_SIZE (in degrees), and Y_CELL_SIZE (in degrees)
· If ( GRID_PROJECTION = GEOGRAPHIC and ( GRID_DATUM IN [NAD27, NAD83] ) ) Then
§ specify: -180º < GRID_ORIGIN_X < 0º;
§ specify: 0º < GRID_ORIGIN_Y < 90º; and
§ specify: NUM_X_CELLS, NUM_Y_CELLS, X_CELL_SIZE (in degrees), and Y_CELL_SIZE (in degrees)
· If ( GRID_PROJECTION = UTM and ( GRID_DATUM IN [NAD27, NAD83] ) ) Then
§ specify: 3 < UTM_ZONE < 22
§ specify: 160,000 meters < GRID_ORIGIN_X < 834,000 meters (valid at the equator);
§ specify: 0 meters < GRID_ORIGIN_Y < 10,000,000 meters; and
§ specify: NUM_X_CELLS, NUM_Y_CELLS, X_CELL_SIZE (in meters), and Y_CELL_SIZE (in meters)
· If ( GRID_PROJECTION = STEREOGRAPHIC and ( GRID_DATUM IN [SPHERE, WGS84] ) ) Then
§ specify: -180º < GRID_LON_ORIGIN < 180º;
§ specify: -90º < GRID_LAT_ORIGIN < 90º;
§ specify: GRID_ORIGIN_X (in meters);
§ specify: GRID_ORIGIN_Y (in meters); and
§ specify: NUM_X_CELLS, NUM_Y_CELLS, X_CELL_SIZE (in meters), and Y_CELL_SIZE (in meters)
· If ( GRID_PROJECTION = LAMBERT and GRID_DATUM = SPHERE ) Then
§ specify: -180º < GRID_LON_ORIGIN < 180º;
§ specify: -90º < GRID_LAT_ORIGIN < 90º;
§ specify: -90º < GRID_LAT_1 < 90º;
§ specify: -90º < GRID_LAT_2 < 90º;
§ specify: GRID_ORIGIN_X (in meters);
§ specify: GRID_ORIGIN_Y (in meters); and
§ specify: NUM_X_CELLS, NUM_Y_CELLS, X_CELL_SIZE (in meters), and Y_CELL_SIZE (in meters)
· If ( GRID_PROJECTION = LAMBERT and ( GRID_DATUM IN [NAD83, NAD27] ) ) Then
§ specify: -180º < GRID_LON_ORIGIN < 0º;
§ specify: 0º < GRID_LAT_ORIGIN < 90º;
§ specify: 0º < GRID_LAT_1 < 90º;
§ specify: 0º < GRID_LAT_2 < 90º;
§ specify: GRID_ORIGIN_X (in meters);
§ specify: GRID_ORIGIN_Y (in meters); and
§ specify: NUM_X_CELLS, NUM_Y_CELLS, X_CELL_SIZE (in meters), and Y_CELL_SIZE (in meters)