1. 1 Some ideas for students to think about while doing class evaluation Goals of the course: To teach anyone who wants to learn GIS, GIS. It is an intro course, so it tries to serve all knowledge levels. Trying to have you leave here with a solid grounding of GIS and GIS science fundamentals. I have the exam later in the semester because I think it is important for your learning to go back and think about the early class lecture content with some experience using GIS. I teach using the hands on labs for two reasons. It allows me to show you how to do important GIS steps, but it also serves as a reference book for later. I know of NO book that provides you the steps I do in the coursepack. – Questions: Are the computer hands on classes too tedious? Would it be better to provide less structured or hand-holding classes? I know other classes try to do it this way, but I think for an introductory class this is a better way. If/when I teach an advanced course I am thinking that will be more free-form and open ended. But would like your opinion. Should I move to a two-exam system? With one earlier in the semester? Will that take away from the idea that I think you learn rethinking the intro lectures after some time with doing GIS stuff? Should I cut down the “GIS input” section of the class, and maybe not show address geocoding to give more time for the analysis stuff at the end? Lab students: How did the lab 1 CR work? Would you recommend I do it again?

2. 2 Analysis 1 Class Attribute and “Select by Location” Queries (p. 230 Bolstad) Select queries on the layer’s attribute table –ArcMap – selection menu, “select by attribute” queries Neighborhood analysis (queries) –What’s adjacent? (In ArcMap – selection menu, “select by location” queries) –What’s nearby? (In ArcMap – selection menu, “select by location” queries) –We’ll do some exercises of this after this lecture

3. 3 ANALYSIS 2 What kinds of analysis can we do with GIS? 1.Measurements 2.Layer statistics 3.Queries 4.Buffering (vector); Proximity (raster) 5.Filtering (raster) 6.Map overlay (layer on layer selections) 7.Transformations 8.Reclassification

4. 4 Buffer zones around (a) point, (b) line, and (c) area features 4a. Buffering – Vector (p. 245 Bolstad) Buffer at a specified distance; At a distance from an attribute field; and As multiple rings at a defined increment. In ArcMap: ArcToolbox, Analysis tools, Proximity, Buffer wizard

5. 5 7. Transformations Functions to transform a layer of one feature type to another. Some examples: –Point to line: interpolation (contour mapping) (Bolstad ch. 13) –Point to polygon: buffering –Polygon to polygon: dissolve/merge (p. 243 Bolstad) Raster to vector conversion –(In ArcMap, 3-D analyst extension, convert, raster to feature) Vector to raster conversion –(In ArcMap, 3-D analyst extension) Raster to Triangular Irregular Network (TIN) –In ArcGIS, 3-D analyst extension Resampling a raster grid – convert one cell size to another cell size

6. 6 Vector overlays: (a) point-in-polygon 6a. Vector Overlay – Point-in-Polygon (p. 256 Bolstad) Point-in-Polygon is used to find out the polygon in which a point falls. Example: Which landcover does each meteorological station fall into? Bolstad notes a problem going the other way – polygon to point. Anyone remember?

7. 7 Vector overlays: (b) line-in-polygon 6b. Vector Overlay – Line-in-Polygon Line-in-Polygon: Used to find out what polygons a line falls within. More complicated than point, because one line can be in more than one polygon Example: Which roads pass through forest areas? What parcels might be affected by a new bike trail design?

8. 8 Vector overlays: (c) polygon-on-polygon 6c.Vector Overlays: Polygon on Polygon (Bolstad p. 261) Where is there forest within the resort? Where is the resort boundary and where is there forest within the resort? Where are areas of forestry OR areas within the resort? Also called “clipping” Note: Problem of “sliver polygons” – when boundaries don’t coincide exactly

9. 9 6d. Vector Overlay – In ArcMap ArcToolbox/Geoprocessing Available Functions: –Union – see slide 6c. “Atbox-An Tools-Overlay-Union” –Intersect – see slide 6c. “Atbox-An Tools-Overlay- Intersect” –Clip (“cookie cutting”) – see slide 6c. “Atbox-An Tools-Clip” –Merge – appends two or more layers together to create a new layer (e.g., side by side). “Atbox-Data Management Tools-General-Append” –Dissolve – reduces number of features by merging adjacent features with the same attribute value. Creates a new layer. “Atbox-Data Management Tools- Generalization-Dissolve”