Geography Reference
In-Depth Information
As the first line of the text file, use the following text exactly as shown including the quotation
marks:
“Comp_ID”,”Easting”,”Northing”
3. Save the file as Coordinates.txt in
___IGIS-Arc_ YourInitials \Student_Data_Collection.
4. Start ArcMap with a Blank map. Make a folder connection to Student_Data_Collection. Add
Coordinates.txt as data. The T/C will show the path to the file. (Notice that List By Source is
active in the T/C. If you click the List By Drawing Order button, the T/C will show nothing, since
this is not—yet—a feature class. Make sure the List By Source button is active.)
5. Right-click Coordinates.txt and choose Display XY Data to bring up a window of that name. In
the X Field drop-down menu choose, of course, Easting. Make the correct choice for the Y Field.
When you OK the window, you should see point symbols for each computer or desk (and maybe
a warning message; disregard). The T/C will show an entry named
Coordinates.txt Events. 19
Open the attribute table of Coordinates.txt Events. You should see the text file you created, but here in
attribute table format. Examine it; dismiss it.
Making a Table That Contains the Student Data
6. Open the ArcCatalog sidebar. Navigate to and highlight the folder
___IGIS-Arc_ YourInitials \Student_Data_Collection.
Right-click. Select New > dBase Table. In the Catalog Tree, change the name of the table to
Student_Info.dbf. (If New_dBase_Table appears in the T/C of ArcMap, remove it.) Add Student_
Info.dbf to the map as data.
7. Open the Student_Info.dbf table. You will see only two column heads: OID and Field1. Click
Table Options and pick Add Field. In the window, type St_Name in the Name field. For the Type,
choose Text. For Length, type 20. Click OK.
8. Add another field called Armspread. Make it a floating-point number (Float) that can contain
two digits overall (Precision value: 2) with one decimal place (Scale value: 1). Add another field,
Height, with the same characteristics. Add Eye_Color as a Text Field of length 8. Finally, add
St_ID as a Short Integer.
9. Right-click the column Field1. Delete the field.
19 Event has a specific meaning in ArcGIS. It refers to a geographic location that is stored in a table.
 
 
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