Map and Spatial Interpretation Flashcards

An officer at the corner of 1st Ave and Pine St is dispatched to a call at 3rd Ave and Oak St. The city map indicates all Avenues run North-South and all Streets run East-West, with numbers increasing to the East and street names progressing alphabetically (Maple, Oak, Pine) to the North. What is the most direct route for the officer to take?

Answer: South on 1st Ave, then East on Oak St.

The officer starts at 1st and Pine and needs to get to 3rd and Oak. Since street names progress alphabetically to the North (Maple, Oak, Pine), Oak St is South of Pine St. Since avenue numbers increase to the East, 3rd Ave is East of 1st Ave. Therefore, the officer must travel South and East. The most direct route is to travel South on 1st Ave to Oak St, and then travel East on Oak St to 3rd Ave.

A crime analysis map uses symbols to represent different incidents. A solid circle represents a burglary, a solid square represents a vehicle theft, and a star represents an assault. A high concentration of stars is noted within the B-4 grid square of the city map. Which of the following can be inferred from this information?

Answer: There is a statistically significant cluster of assaults in the B-4 grid square.

The legend indicates that a star symbol represents an assault. A high concentration of these symbols in a specific grid square directly translates to a cluster of assault incidents in that area. The other options are either too broad (property crimes would be circles and squares), subjective ('most dangerous'), or suggest a specific action for a different crime type.

An officer is instructed to establish a two-block perimeter around a suspect's last known location at the intersection of King St and 4th Ave. Assuming a standard grid layout, which of the following intersections would be one of the four corners of the inner perimeter?

Answer: Queen St and 6th Ave

A two-block perimeter around an intersection means cordoning off the area two blocks in each cardinal direction (North, South, East, West). If the center is King St & 4th Ave, the perimeter would extend to 2nd Ave, 6th Ave, Queen St (assuming alphabetical order after King), and the street two blocks before King. Therefore, the intersection of Queen St and 6th Ave would represent the southeast corner of this perimeter. The other options are either too close or do not form a logical corner for a two-block perimeter.

You are viewing a map where the top edge is North. You are located at the Police Station and need to respond to the Hospital. The Hospital is located directly to the right and slightly below the Police Station on the map. In which general direction must you travel?

Answer: Southeast

On a standard map where the top is North, the bottom is South, the right is East, and the left is West. Since the Hospital is to the right (East) and slightly below (South) the Police Station, the required direction of travel is Southeast.

A tactical map shows a one-way street, marked with an arrow, on Baker St pointing eastbound between 5th Ave and 6th Ave. An officer traveling north on 5th Ave needs to reach a location on Baker St between 6th Ave and 7th Ave. Which of the following actions is permissible?

Answer: Continue north on 5th Ave to the next street, then travel east to 6th Ave, then turn south.

The officer cannot turn right (east) onto Baker St from 5th Ave because the one-way section between 5th and 6th prevents this. They must find an alternate route. Continuing north to the next available street allows them to bypass the one-way restriction legally, travel east, and then approach the target location from the correct direction (south on 6th or 7th Ave).

An officer is looking at a city map with a coordinate grid overlay. A witness reports a crime occurred at the 'Main Library'. The map index lists the Main Library at coordinates G-9. How should the officer interpret this information?

Answer: The library can be found by following Grid Line G until it intersects with Grid Line 9.

Alphanumeric grid systems on maps are used to find locations by identifying the square where the horizontal and vertical grid lines intersect. 'G-9' refers to the grid square formed by the intersection of the column labeled 'G' and the row labeled '9'. The other options misinterpret the purpose of a map grid.