GIS Lesson
Esteban
October 15, 2019
Setup:
Open and copy
this google spreadsheet
to record your findings.
GIS = Geographic Information Systems
Fancy maps using LOTS of data
Goals
Learn how to use aerial images to analyze the environment
Acquire data from a free source
Get introduced to open source geographic software
PS: this lesson is available
here
Step 1.
Open your city’s GIS service (or google maps if you don’t have one)
For West Linn it is
MapOptix
Step 2.
In MapOptix find where you live
Turn on the base layer titled “AIR PHOTO 1936”
Take a screenshot of what the land looked like where your house is now and add it to the google doc. Be sure to:
scale it appropriately (approximately 1:2400)
turn off base map overlays
Step 3.
Turn on the layer “AIR PHOTO 2017”
Find and record the creek closest to your house
By turning on the “Environment” layer it is easier to locate streams
Step 4.
Under the environments tab there is a wetland tab
Along the top bar there is an option called Query/Info/Measure
Measure the area (in square meters) of the wetland closest to your house
Record area and add a screen capture of the polygon you made
Step 5.
Turn on Flood Management Areas
Under the Geology tab turn on Landslide Hazards
Turn on Metro Habitat
Record whether or not your house falls into any of these polygons. If it does record which ones.
Step 6.
Answer question 5
Where can you find GIS data?
The National Map
Oregon Spatial Data Library
Metro RLIS
How do you process GIS data?
R and RStudio
QGIS
NOT OPEN SOURCE (very expensive):
Esri aka ArcGIS