Lab 9B Part B

[Quinn Hall]

Where again is the PatsCabin DODInputs.zip file? The .pdf says it was in the Lab07 Data, but I can't find it anywhere. It's not in the Lab 9B Data either, at least that I can see. When I click on the link in the instructions .pdf I get the forbidden access page from jwheaton/courses. 

Has anyone else found it?  

Thanks...

[Quinn Hall]

Ahhh... ask Google and ye shall receive:

http://gis.joewheaton.org/assignments/labs/lab-07---building-dems/task-5

[Shannon Wing Belmont]

Egad! Way to solve the problem, Quinn.

Looks like I completely forgot to package the data for this task.

So Canvas now has a link for the Lab 9B task 3 data.

The instructions have also been updated, so you might want to refresh or redownload Lab 9B instructions.

Sorry about that!

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Shannon Belmont

Quinney College of Natural Resources
Utah State University
5210 Old Main Hill
Logan, UT 84322-5210

[Jeran Farley]

For my DoD legend, I have 20 different values displayed, from red to blue.  Is there a way to change this to a graduated color scale, similar to an elevation scale? 

[Shannon Wing Belmont]

Hi Jeran,
You can use any kind of symbology you want. Dr. Wheaton created this classified legend specifically for the DoD output.

If you use a standard color ramp you will want to classify it and label individual classes with specific erosion and deposition values.

I welcome any experimentation and improvements you care to make on the 'default'.

On Mon, Apr 8, 2013 at 10:07 AM, Jeran Farley <jeran...@yahoo.com> wrote:

For my DoD legend, I have 20 different values displayed, from red to blue.  Is there a way to change this to a graduated color scale, similar to an elevation scale? 

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[Jason D Jones]

Lab 9b, right from the start problems, the instruction say to leave
all the default values the same when mosaic to raster is performed,
but you have to add in the number of bands to get it to work, I
guessed (1) because that's what's in the attribute table for number of
bands on the Ogd_lidar_3.img, the tool worked and added the mosaic to
the map, but It's not displaying anything,

[Kole Stewart]

I'm struggling a bit with the curvature tool I pit filled the provided DEM for lab 9B then ran the curvature tool and created the three curvature layers but all three of the outputs are really grainy even when I zoom in and out. Anyone have any suggestions?

[Jason D Jones]

I really don't know if you need to mess with all the curvature values,
if you look through some of the examples, the values range from -20 to
20 for the planform for instance, mine are more like -850 something,
to 850, anyone know

[Jason D Jones]

They look better if you mess with values, less grainy, I just don't
know whats right

[Kole Stewart]

Yeah, ok so yours looked a little funny too then. Mine looks kind of like a fuzzy television but when I zoom in I can tell there is some order to it. I guess I'll get after it again tomorrow. Thanks Jason

[Shannon Wing Belmont]

Jason,
You are right to add "1" to the bands. Good job.  Are you sure its not displaying? It will look just like the existing 2 mosaics without the middle seam?

On Thu, Apr 11, 2013 at 11:43 AM, Jason D Jones <jason...@utah.gov> wrote:

[Shannon Wing Belmont]

Jason,
-850 to 850 is pretty high. For this data we usually end up in the -40/-20 to 20/40 range. But anything is possible.
You are right, you really don't want to or need to mess with the curvature values.
The display color ramps are best if they include 3 colors, one for negative one for neutral and one for positive curvature values. It won't look like much at the full watershed scale, but if you zoom in, and overlay with something for reference (stream layer, hillshade, etc.) to give us something we can evaluate the curvature results against.

[Shannon Wing Belmont]

Kole, I think you are ok. See my response to Jason above with suggestions for displaying the curvature against a reference layer for context.

[Jason D Jones]

Ya, Shannon, I tried running the tool again, it's pretty straight
forward, you input the pit-filled DEM and output a plan, profile, and
curve raster set; my numbers though, planform 856 (-831); profile 1118
(-1253); curve 1900 (-1950);

On Fri, Apr 12, 2013 at 8:05 AM, Jason D Jones <jason...@utah.gov> wrote:
> all my values are for curvature are pretty big, maybe I nee to try to
> redo them. I've been working through this lab not sure if I'm getting
> the right answers, but I've got some answers
>
> On Fri, Apr 12, 2013 at 6:23 AM, Shannon Wing Belmont

[Shannon Wing Belmont]

Jason,

The values you are reporting are right on the money. This is a watershed with extreme curvature values. :)

[Jason D Jones]

Can I get some help on setting up the raster calculator to output a
plus or minus 10cm raster?

On Fri, Apr 12, 2013 at 11:03 AM, Shannon Wing Belmont

[Shannon Wing Belmont]

Jason,

You should be able to double click on your DEM of difference file name, then "<" button, then "-0.1" if that matches your units, then the up and down bar (the boolean "or") then double click on your DEM of difference file name, ">" button, "0.1".

"DoD" < -0.1 | "DoD" > 0.1

don't copy and paste that... use the buttons and your file name.

good luck

[Jason D Jones]

nevermind

[Fidel Zebadua]

Hello Shannon,

I am facing some issues with lab 9B. First one when I try to run the Raster Calculator tool the software starts thinking and after 2 minutes it closes suddenly. So I tried to do the same several times and finally I decided to classify manually the slope values and (>=45, etc.). It worked, but I realized this layer has not attribute table, so I am not able to see how many cells it has and then try to make raster math (cell area multiplied by number of cell featured).

I clipped the layers for obtain the features within the boundaries by two different ways: first one right clicking on layers dataset/properties/data frame tab/clip to shape/specify shape/click on Ogden watershed/OK. And the other way is by Geoprocessing tools, Clip tool and define the Ogden layer as the boundary. Both of these method worked well on clipping but none of them is able to show attribute tables. Even I used the extract tool for update and readjust the raster layer information but it stills with no attribute table shown.

Finally I decided to try doing by looking on area option through vector options. So I tried to convert from raster to vector using the tools as raster to polygon and raster to polyline and when I try to put the raster in the input field, a warning signal appears. It does not let to keep going.

I know it is just the beginning of the lab but I will keep trying, something good should happen! Thank you.

[Shannon Belmont]

Hi Fidel, did you classify in the properties? Did you try running the reclassify tool? This should produce an attribute table for you.

Sent from my sub-optimal and adversely antiquated iPhone

[Ingrid Campbell]

Shannon- I cannot get your formula to work in the raster calculator.  It just keeps coming up with an error.  What is the DOD file in the task 3 data? is that the subtracted dod already done for us? I tried to use that as well for the confidence threshold calculator and I get the same error.  

[Ingrid Campbell]

oh thats fun... I have been doing this for probably an hour, and all i had to do was scroll down to the third version of the instructions.

[Kole Stewart]

Shannon, 

I was looking at the grading rubric and it shows that there are three questions we need to answer, but in the 9B instructions it doesn't really specify the questions. Is this just and left over from an old lab that shouldn't be there? 

[Shannon Wing Belmont]

Apologies~

Thanks for the catch, Kole.

Rubric has been updated.

[Bryan Christensen]

I struggled with this also.  Instructions have typically been given in a step by step format, so I didn't read ahead to see that there are 3 sets of instructions.  The 3rd is fleshed out the most and is the easiest to follow.  

Bryan Christensen

Dedicated Hunter/Volunteer Services 

Program Coordinator

Phone 801-200-4400