0 2 4 8 8 10
+ Gage site
Figure 1.
12 14 18
MILBS
* Basin boundary
Lotus Map of the Cypress Creek Basin, Using
Graph Command with Vertical and Horizontal
Gridding.
4
. 05
*
*
*
+ T. 10
*
0 0
CY RES *
*
+ RESE* *
*
*
*
*
these crude but quite useful maps were constructed for each
parameter file. By creating a list of X and Y coordinates (Table
1) on the spreadsheet, any number of Z attributes may be
assigned. In the case of Table 1, which contains a sample of the
data used to create the raingage map, a 16 by 16 matrix was
formed by entering a series of coordinates (X= .5 through 15.5,
with corresponding Y values). Each cell of the matrix can
represent any areal unit; in this case, one square mile. Since
the area of the watershed is 117 square miles, this matrix will
easily accommodate the entire watershed. By using the Copy
command, it is unnecessary to type in all 256 values of the
coordinates. The first 16 values may be entered using the Data
Fill command, by which any consecutive set of numbers may be
entered instantly and automatically. Then, the Copy command is
used to copy the original 16 entries to the desired amount of
cells. Using this same technique for the Y values will create a
16 by 16 matrix within a few minutes. Once the first map is
constructed, the scale can be altered by multiplying all X and Y
coordinates by a scaling integer. Thus, it is possible to zoom
in or out, as on computeraided design (CAD) systems (see Figure
2).
If numbers or labels are assigned to the cells on the map,
then a matrix of Z attributes is assigned to the X and Y
coordinates. Each value will appear in the center of the cell
(Figure 3), and will be changed automatically if the Z
coordinates are altered on the spreadsheet. In Figure 3, only
5
.06,
