GIS tools

Question 1

Kernel Density

Answer 1

Calculates the density of features (point or line) in a neighborhood; output: raster

Question 2

Extract Values to Points

Answer 2

Extracts the cell values of a raster based on a set of point features; records the values in attribute table of an output feature class
*also “extract multi values to point”

Question 3

Minimum Bounding Geometry

Answer 3

Draws the smallest polygon possible that encompasses all input features
options: generic rectangle (min/max X/Y points) vs convex hold (closer hugging boundaries)

Question 4

Summarize Within

Answer 4

Overlays a polygon with another layer (to summarize number of points, length of lines, area of polygons within) and calculate attribute field statistics about the features within those overlayed polygon(s)

Question 5

Summarize Within: examples

Answer 5

ex:
-from a layer of watershed boundaries and a layer of land-use boundaries by land-use type: calculate total acreage of land-use type for each watershed
-from a layer of parcels in a county and a layer of city boundaries: summarize average value of vacant parcels within each city boundary
-from a layer of counties and a layer of roads: summarize total mileage of roads by road type in each county

Question 6

Shortest Path (network analysis)

Answer 6

-shortest path between two locations on a network (phone mapping app)
-may need to manually calculate / convert polyline lengths (distances), then D=S*T to add field (ex) “travel time”

Question 7

Closest location (network analysis)

Answer 7

-closest location to a given point (traveling along network)
-import facilities (ending points) / incidents (starting point)
-modify travel settings and impedance type (travel mode) as desired [context ribbon tab]

Question 8

service area analysis (network analysis)

Answer 8

-what locations can be reached with a given travel time or distance (traveling along the network)