Solutions for Ex4.
I have had a number of questions about the solution to Ex4. Here are some emails from Dr Tarboton with responses to questions:
“The GIS in Water Resources
Exercise 4 refers to a file named
Rey_Watersheds.csv. This should have read ReyStreamGages.csv. This is a file containing the locations of
the stream gages that serve as a basis for Batch Watershed delineation. The file ReyStreamGages.csv
is in the Ex4Data.zip file (but Rey_Watersheds.csv is
not). I will correct the online version
of the exercise to reflect this change.” (10/2)
“I learned (from several of
you) that exercise 4 was incorrect in the specification of coordinate system
for the importing of stream gages.
In Exercise 4 at the display
XY step for displaying stream gages you should select a predefined coordinate
system and browse to Projected Coordinate Systems/UTM/NAD
1927/NAD_1927_UTM_Zone_11N. (It does not
work if you go to a geographic coordinate system as the exercise originally
said). I have corrected this in the
exercise on the website.” (10/3)
I have also heard that some students
have had trouble executing the exercise in the LRC. Please use the computers in ECJ 3.301 if
possible since these have the latest tools on them. I have just learned that there is an incompatibility
between the ArcGIS 8.3 Fill Sinks function and the
Model Builder add-on that I had planned to use for Exercise 6. The LRC are reinstalling ArcGIS
8.3 to get around this. If you reach a
glitch and cannot get past a step in the exercise, there is a solution file set
available at http://ceefs.cee.usu.edu/Ex4.zip
This is 92MB.
A downloaded and unzipped version is available in the LRC in
/class/maidment/giswr2003/ex4.
The exercise is due in on Thurs Oct
9. If you have trouble completing all
steps, do what you can, explain where you got stuck
and turn in the result.