ENVSOCTY 3GV3 - TEST 2 QUESTIONS & ANSWERS

ENVSOCTY 3GV3 - TEST 2 QUESTIONS & ANSWERS

Name 4 facilities feature class input properties - Answer -- facilitytype
- weight
- capacity
- curbapproach

Facilities Feature Class: FacilityType - Answer -- 0 = candidate
- 1 = required
- 2 = competitor (Maximize Market Share and Target Market Share problems)
- 3 = chosen

Facilities Feature Class: Weight - Answer -relative weighting of a facility according to its
attractiveness, desirability, importance, etc. (Maximize Market Share and Target Market
Share problems)

Facilities Feature Class: Capacity - Answer -how much weighted demand a facility is
capable of supplying (Maximize Capacitated Coverage problem)

Facilities Feature Class: CurbApproach - Answer -direction of travel when arriving at or
departing from a facility

Name 4 Facilities feature class output properties: - Answer -- demandcount
- demandweight
- Total_[Cost]
- TotalWeighted_[Cost]

Facilities Feature Class: DemandCount - Answer -# of demand points allocated to a
facility

Facilities Feature Class: DemandWeight - Answer -sum of weight of all demand points
allocated to a facility

Facilities Feature Class: Total_[Cost] - Answer -sum of the network costs between a
facility and the demand points allocated to it (adding up lowest dist. or cost)

Facilities Feature Class: TotalWeight_[Cost] - Answer -cumulative weighted cost for a
facility

Name 6 Demand Points Feature Class Input Properties - Answer -- groupname
- weight
- impedancetransformation
- impedenceparameter
- cutoff_[Cost]
- curbapproach

,Demand Points Feature Class: GroupName - Answer -name of the group a demand
point is part of

Demand Points Feature Class: Weight - Answer -relative weighting of a demand point

Demand Points Feature Class:ImpedanceTransformation - Answer -overrides the
network analysis layer's impedance transformation value (linear, power, exponential)

Demand Points Feature Class: ImpedanceParameter - Answer -overrides the network
analysis layer's impedance parameter value

Demand Points Feature Class: Cutoff_[Cost] - Answer -overrides the network analysis
layer's Cutoff value

Demand Points Feature Class: CurbApproach - Answer -direction of travel when
arriving at or departing from a demand point

Name 2 Demand Points Feature Class Output Properties - Answer -- FacilityID
- AllocatedWeight

Demand Points Feature Class: FacilityID - Answer -object ID of the facility the demand
point is allocated to (null values indicate that the demand point was not allocated to a
facility or it was allocated to more than one facility in the case of the Maximize Market
Share and Target Market Share problems)

Demand Points Feature Class: AllocatedWeight - Answer -- Null = demand point was
not assigned to a facility (outside of cutoff)
- 0 = demand point is only assigned to competing facilities (Maximize Market Share and
Target Market Share problems)
- Positive Value = amount of demand assigned to chosen and required facilities

Lines Feature Class: Output only class that contains... - Answer -line features that
connect demand points to the facilities they are allocated to
- represents shortest network path (travel time, distance) between a demand point and
facility

Name 5 properties of a Lines Feature Class - Answer -- Name
- FacilityID, DemandID
- Weight
- TotalWeighted_[Cost]
- Total_[Cost]

Lines Feature Class: Name - Answer -name of the line formatted such that the facility
name and the demand point name are listed in the order they are visited (depends on
direction of travel)

, Lines Feature Class: Facility ID, DemandID - Answer -IDs of connected features

Lines Feature Class: Weight - Answer -weight assigned from a demand point to a
facility

Lines Feature Class: TotalWeighted_[Cost] - Answer -weighted cost of travelling
between a demand point and a facility (minutes or distance)

Lines Feature Class: Total_[cost] - Answer -network cost of travelling between a
demand point and a facility

Barriers serve to... - Answer -temporarily restrict or alter costs on parts of the network

When a new network analysis layer is created, the barrier classes are... - Answer -
empty
- populated only when you add objects to them - not required

Where are barriers available? - Answer -in all network analysis layers, not just the LA
analysis layers

Default Impedance or Linear Cost (Distance, TravelTime) is: - Answer -Linear cost =
impedance

Default impedance can be altered via... - Answer -impedance transformation

Impedance Transformation - Answer -- a function that transforms the cost of travel
between demand points (d) and facilities (f)

Power Cost Impedance = - Answer -Power Cost = impedance ^ Beta

Exponential Cost Impedance = - Answer -exp(Beta x impedance)

Impedance Parameter - Answer -Beta
- set by the use (except for linear which is automatically set to 1)

Impedance transformation is used to... - Answer -transform the cost of travel such that
distant or nearby demand points are emphasized in the solution (Minimize Weighted
Impedance)

Beta > 1 - Answer -emphasizes distance location (as value increases, emphasis
increases)

0 < Beta < 1 - Answer -emphasizes nearby locations (as values decreases, emphasis
increases)