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Analysis conducted by Rebecca Hobbs and Leticia Mata
Projection
NAD_1983_HARN_StatePlane_California_III_FIPS_0403_Feet
Retrieved Raster data from USGS Seamless Server
(Digital Elevation Model 1”)
Retrieved Vector data directly from Marin County
website: http://www.co.marin.ca.us/depts/is/main/gis/
Opportunity Sites:
CHALLENGES:
Made multiple attempts to retrieve Crime Data for Marin County
on-line. Marin County Director was contacted via phone called
and e-mail, however we received no response.
Attempted to present analysis in 3-D form using ArcScene,
however encountered difficulties when we tried to extract
elevation from base heights.
Unable to successfully incorporate the Aspect shapefile in the
composite union for constraints.
Introduction:
Tilden Preparatory School is a
private High School specializing in
one-to-one teaching, allowing
students to work at their own pace
to get an individualized education.
Tilden Prep has recently become so
popular that the directors are
looking to open a new branch in
marin county. They came to us to
conduct a suitability analysis…
RESULTS:
•A significant amount of land
within Marin County faces some
type of constraint.
•Considering our emphasis on
proximity to public high schools
and public transportation, we
believe the most appropriate sites
for another branch of Tilden Prep
H.S are those outlined in pink.
Suitability Analysis for Tilden Preparatory School
Moving to Marin County
Layer Description Value
Landslide Zones classified as “many landslides”
or “mostly landslides” were weighted as
constraints.
-1
Liquefaction Zones classified as “Very High” or
“High” were weighted as constraints.
-1
Inundation All zone with potential for inundation
were weighted as constraints in the
event of dam failure.
-1
Layer Description Value
Bus Route Buffered 2,640 feet (walking distance =
1/4mi)
+2
Public High
School
Buffered 2,640 feet (walking distance =
1/4mi)
+2
Bikeway Buffered 2,640 feet (walking distance =
1/4mi)
+1
Library Buffered 2,640 feet (walking distance =
1/4mi)
+1
Law
Enforcement
Buffered 2,640 feet (walking distance =
1/4mi)
+1
Fire Station Buffered 2,640 feet (walking distance =
1/4mi)
+1
Medical Buffered 2,640 feet (walking distance =
1/4mi)
+1
METHOD:
Raster Data Analysis included the following:
•Within Vector Attribute Table, we selected the
corresponding attributes. Then saved the
selected attributes as a new layer by exporting
selected attributes. We added a new field to
assign values.
•Converted Vector Shapefiles into Raster
(Spatial Analyst ConvertFeatures to Raster)
•Reclassified the various raster coverage’s to
commensurate assigned values.
•Converted Raster files back to Feature files.
Performed unions of the various feature files
and used field calculator to attain total weight
for composite constraint and opportunity maps.
Performed a final union of both composite maps
for final map.
Aim
•We personally met with the Directors at
Tilden Preparatory High School in
Albany to discuss their interests.
•Performed a Suitability Analysis for
Marin County according to the
techniques outlined by McHargs
studies.
Composite of Opportunities Composite of constraints
Suitability Map
A
B
C
Opportunities
Constraints