Welcome to SAL

Welcome to "SAL"
The Spatial Analysis Lab

University of Washington
College of Ocean and Fishery Sciences

	We are located on the first floor of the Ocean Science Building in room 111. This is a restricted access lab, open to UW students, faculty and staff participating in approved coursework and research activities. The purpose of the lab is to facilitate teaching and research in the field of spatial analysis for the earth sciences. This lab is designed to function as a "collaborative" learning environment with five (5) workstation, large layout workspaces, and conference areas. We have equipped the lab to act as a place for working jointly on projects, however the design is well suited for individual research projects as well. The computing environment is a shared workgroup using Windows NT, with access to file and print servers. The software maintained on these workstations support advanced work related to spatial analysis, GIS, and remote sensing. The commercial software include ArcView, ArcInfo, Erdas Imagine, ENVI, IDL, Matlab, and a collection of common productivity tools. Contact: Miles Logsdon if you have questions or would like a tour of the lab facilities
GETTING STARTED Remember: Always save your work to your working directory Never load software without permission Never leave directories "shared", and Always ask if you have questions I. Paint Shop Pro - working with "pictures" Start Paint Shop Pro from the window menu (start > program > Paint Shop Pro 6 > Paint Shop Pro 6). The main thing you'll want to use this software for is to "capture" a picture of what is being displayed on your screen. From the menu select CAPTURE > SETUP. From this dialog make sure the "capture - area" and "active - right mouse click" options are selected. Now, select CAPTURE > START (note the shift+C option). The window will be minimized. RIGHT MOUSE CLICK (see the cross-hairs) then LEFT MOUSE CLICK - RELEASE - DRAG -LEFT MOUSE CLICK.

Now, SAVE (file > save). Change the file type to .jpg, pick a name, and navigate to your working directory. Exit the software.
II. STELLA - a visual programing tool. Start STELLA from the window menu (start > program > STELLA > stella), you'll see the opening level and the standard icon bar.

The icons are very intuitive. The hand moves, the paint brush changes colors, the dynamite deletes, the ghost copies, the text block adds documentation, the graph pad creates a graph. Most importantly, you'll need to know what the basic modeling icons are, then you can start just about anything.

Stocks are used to represent system components that can accumulate material over time Flows represent components whose values are measured as rates Converters represent constants, variables, functions, or time series. Connectors indicate the cause/effect relationship * for now just drag and drop icons, connect them together, and name and save you model to your working directory. III. ArcView, a desktop GIS Start ArcView from the window menu (start > program > ESRI > arcview3.0), you'll see the opening screen and be asked if you wish to "create a new project with a new view" you won't ALWAYS want to do this for now click on OK. When asked if you would like to add data now? RESPOND - No. You should see this:

See the button? This will add spatial data into you viewer. Click on it and navigate to "introgis" sub-directory under the D:/classes/riv2000 directory on your machine.

You'll see that the "theme" veg has been added. Click on the "checkbox" and the map will be drawn. NOW double click on the word "VEG" and in the resulting dialog box change the legend type to "unique Value" and select "cover" for the values field. Click on apply and close the dialog box. You should have this:

NOW save your work to your working directory and exit. IV. ERDAS Imagine - Remote Sensing Image processing. Start ERDAS from the window menu (start > program > ERDAS > erdas imagine 8.3), you'll see the icon panel and a standard viewer.

Like most GUI's, this one offers many different way to do the same thing. Most of the functions you'll want will be available from the icons or menus of the "viewer". Load an image by clicking on the "open file" icon and navigate to the D:/class/courses/riv2000/erdas directory on your machine. Select the file "sea1024.img". The image will load, BUT you'll only see part of the image. Use your right mouse button to "fit the image to the window"

ZOOM- IN on the Greenlake to U. district (click on the magnify glass and drag in the image). Then click on the "cross-hair" icon to start the inquire tool. Here is what you should be seeing. The table informs you that the single cell (pixel) where the cross-hair is located has this set of values in the seven spectral bands and which of those bands are being displayed in Red-Green-Blue. Close the inquire dialog.

Now compare the spectra of different surfaces. Click on the profile icon , and select the "Spectral" option. Once the blank spectral profile chart is opened, click on the "cross-hair" icon from the profile icon menu bar. MOVE YOUR MOUSE INTO THE VIEWER - and click somewhere over the water - a profile target will be displayed and the spectra of that surface material will be plotted. REPEAT this step (i.e. select the cross-hair, etc.) and click somewhere over the land. You can see that the spectra are different.

Exit the software - DO NOT - save your work.