Creating a location map and adding downloaded
basemap data.
You have collected a set of data on landslides
in the Portland metropolitan area and need to produce a location
map.You will find downloadable basemap materials on the Oregon
GIS, and USGS Seamless sites. To create an inset map you can
use materials in the ESRI data set. Use this landslide
file to plot the distribution and of landslides resulting
from the 96/97 storm event. Here is a copy of the report that accompanied the data set.
1. Download the data
file.
2. Open landslides_dd.xls in Excel.
3. Export the data as a DBF3 file (from the Save
As dialog box). Close Excel.
4. Open ArcGIS.
5. From the Tools menu, choose Add XY data. Find
your table and choose the appropriate columns for X and Y.
- Save this Event Theme as a Shapefile by rt-clicking it in
the legend and choosing Data->Export and giving it a new
name. The name should be different than the name you used
in step 3, as shapefiles contain DBF files. Refer to "Anatomy
of a Shapefile" lecture notes (your own).
6. Add the States and Counties themes from the
Esri/Esridata/US directory.
7. Create a new coverage of just Oregon by using
the Select Features Tool (turn on Tools if necessary), selecting
Oregon and then Exporting (right-click on coverage, Data ->
Export, save it to your h: drive as Oregon). Limit the counties
similarly, or do a theme Definition Query (try it both ways!),
save as ls_counties or something similar.
8. Create a Layout showing landslide volumes resulting
from the 1996/97 storm events. Show Oregon, and then a zoomed
in view of the study area. (Landscape/Inset), use Insert Data
Frame and copy just Oregon and LS_counties to it (paste layer).
9. Start over and DO IT AGAIN!
Continue on with the instructions in Assignment
2.
updated: June 23, 2005