Activity 5.1: Making a Sector Map
Due November 29
Sector analysis assessments are recorded on a map to show impacts on the site originating from the outside.
After assessing, permaculture design seeks to channel external "energies," materials, or other impacts (wind, sun, sound, neighbors, eyesores, animal-use corridors, etc.) into or away from the system as needed.
A sector map may include the following elements:
Sun: Sun path charts plot the sun's elevation angle and azimuth angle over a day, as seen from a given location. The elevation angle measures the height of the sun in the sky from the horizon; it's the complement of (90 degrees minus) the zenith angle of the sun. The azimuth angle indicates the direction of the sun in the horizontal plain from a given location. North is defined to have an azimuth of 0 degrees and south has an azimuth of 180 degrees. See the University of Oregon's sun chart program: http://solardat.uoregon.edu/SunChartProgram.html
- Shade: This is best noted through solar site analysis/on site observation.
- Wind: Note prevailing, seasonal patterns, key storms. Find prevailing wind data at: https://www.ncdc.noaa.gov/sites/default/files/attachments/wind1996.pdf
- Flood: Identify areas prone to flooding: https://msc.fema.gov/portal/home
- Fire: Note most dangerous from low to high elevations.
- Noise: Consider both good and bad sources.
- Visual: Consider both positive and negative sights and viewsheds.
- Wildlife: Are there corridors for wildlife? Look at broadscale landscape for clues.
- Pollution: Identify sources and sinks.
- Traffic: Note footpaths and vehicle roads.
For this assignment follow these steps to create your draft sector map:
- Start with the map you created in Activity 1.1: Make a Base Map of Your Site.
- Place a clean piece of tracing paper over the top of your base map.
- Start from the center point of the site, or on an item that is most significant to the design. For example, a house may be not in the exact center of the property, but is the center or focal point.
- Draw a circle with a radius that falls just inside the borders of your mapped site.
- Visit your site to make four observations on the sun and at least three other elements listed above.
- Represent the observations of these elements as sectors in “pie” format on your overlay map. Show the range of elements as best as you can estimate.
- To complete your assignment photograph or scan this draft of your sector map and submit below.