Geography Reference
In-Depth Information
TABLE 5-1
Corner
Number
Easting
Northing
1
1573792.8
176684.5
2
1573800.0
176700.0
3
1573819.0
176691.1
4
1573811.8
176675.7
2
3
1
4
FIGURE 5-6
The corner numbers are given by Figure 5-6. Corner 1 is where the original southwest corner of the
digitized image will go. Corner 2 is the northwest corner. Corner 3 is the northeast corner.
In order to move the court to the correct coordinates, you will need to create a text file that specifies
the “links” from the existing corners of the digitized feature class to the new corners in the parking lot.
Each line of the file consists of three elements (a) a point number (the corner number), (b) the digitizer
coordinates you wrote down earlier in Step 5, and (c) the real-world coordinates provided by the surveyor—
so five numbers will be placed in each row of the text file.
Where you see the designation “corner1x-digcoord” (see below), you need to substitute the coordinates
of the corners from the digitizing process that you wrote down in the table in Step 5 of this Exercise.
For example, corner1xdigcoord might be something like 0.21. Be sure to get the right pairs of digitizer
coordinates associated with the right pairs of surveyor's coordinates. For example, the southwest corner
is represented in the preceding table by line 1. Also note that the x-coordinate (easting) precedes the
y-coordinate (northing). That is, the text file looks like this:
1 corner1x-digcoord corner1y-digcoord 1573792.8 176684.5
2 corner2x-digcoord corner2y-digcoord 1573800.0 176700.0
3 corner3x-digcoord corner3y-digcoord 1573819.0 176691.1
4 corner4x-digcoord corner4y-digcoord 1573811.8 176675.7
You will put in actual numbers for strings like corner1x-digcoord.
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