Gis Test 1

Front 1

1. INTRO

Front 2

GIS software is only one of the components of a GIS

T/F

Back 2

true

Front 3

Which of the following features would be better represented using the Vector Data Model?

a. Precipitation

b. Elevation

c. Roads

d. None of the above.

Back 3

c. roads

*Vector data model: A spatial data model that uses points and their x -, y -coordinates to construct spatial features of points, lines, and polygons.

Front 4

Which of the following features are continuous?

a. Precipitation

b. Elevation

c. Land used.

e. a and b only

Back 4

e. a and b only

Front 5

One can use both vector data and raster data in a GIS project.

t/f

Back 5

TRUE

Though most of GIS processes work either on raster or on vector data, displaying them together is not a problem and processes are available to "transfer" info from one type of data to another. Ex-zonal statistics that computes the average of the cell values located inside a poly

Front 6

One would normally begin with __________ in a GIS project:

a. data display

b. database construction

c. data analysis

d. data exploration

Back 6

b. database construction

Though the 3 other steps cannot be easily sorted and often happen together, gathering data and constructing a database is always the first step in the implementation of a GIS project.

Front 7

Which of the following applications in ArcGIS Desktop is designed for data management?

a. ArcMap

b. ArcCatalog

Back 7

b. ArcCatalog

ArcMap- data display and analysis

Arc Catalog- data management

Front 8

Which of the following activities cannot use a GIS?

a. Crime mapping

b. interactive mapping

c. transportation planning

d. none of the above

Back 8

d. none of the above

All these activites can use (and do use most of the time) a GIS.

Front 9

2. COORDINATE SYSTEMS

Front 10

2.

Nowadays, most GIS software can display together layers with different coordinate systems, but some geoprocesses still require that all layers align spatially.

T/F

Back 10

True

GIS operations that use several layers as input always rely on notions such as distance or relative locations of the features. If layers did't align spatially, distances and relative locations of features from different layers wouldn't be correct.

Front 11

Map projection is a process of converting from:

a. a three-dimensional surface to a two-dimensional surface.

b. a two-dimensional surface to a three-dimensional surface.

c. a two-dimensional surface to a two-dimensional surface.d. None of the above.

Back 11

a three-dimensional surface to a two-dimensional surface.

Map projection is the process of converting from the 3D surface of the Earth to the 2D surface of paper or screen.

Front 12

A conformal projection preserves the property of:

a. relative size

b. Local shapes

c. distances

d. None of the above.

Back 12

b. Local shapes

Conformal projections preserve local shapes and angles, but distort relative surfaces and distances.

Front 13

Which of the following statements is true about North American Datum (NAD)?

a. NAD83 is a newer datum than NAD27

b. NAD83 is based on a satellite-determined spheroid.

c. Maps based on NAD83 can register spatially with maps based on NAD27.

d. All of the above

e. Only a and b

Back 13

e. Only a and b.

Maps based on NAD83 cannot registered with maps based on NAD27, since they are based on different spheroids. A geometrical transformation is needed. In the conterminous US, the horizontal shif can be as much as 100 meters.

Front 14

Which coordinate does a false easting apply to?

a. X

b. Y

Back 14

a. x

False easting is to change the origin of the longitude coordinate x

Front 15

Which of the following statements is true?

a. Meridians are lines for measuring location in the E-W direction, and parallels are lines for measuring location in the N-S direction. Y

b. " " lines " " N-S direction, parallels are lines " " E-W direction.

c. " " points " " E-W direction, parallels are points " " N-S direction.

d." " points " " N-S direction, parallels are points " " E-W direction.

Back 15

a. Meridians are lines for measuring location in the E-W direction, and parallels are lines for measuring location in the N-S direction.

Front 16

The secant case means that a cylindrical projection has ___ line(s) of tangency:

a. 1

b. 2

c. 3

Back 16

b. 2

With the secant case, the surface of the globe and the envelop of the cylinder intersect, creating 2 lines of tangency (parallels when the aspect is normal)

Front 17

3. VECTOR DATA MODEL

Front 18

Which is true about the vector data model?

a. The model uses x-, y-coordinates to store the geometry of spatial features.

b. The model uses points, lines and polygons to represent simple spatial features.

c. The choice of a geometric type to represent spatial features using the vector data model depends on map scale.

d. All of the above

Back 18

d. All of the above.

Front 19

Which of the following statements is NOT true about the polygon feature?

a. A polygon is a two-dimensional object.

b. A polygon has the properties of area and perimeter.

c. A polygon may form a hole within another polygon.

d. None of the above

Back 19

d. None of the above

Front 20

a stream is more likely to be represented as a single line on a 1:100,000 scale map than on a 1:24,000 scale map.

t/f

Back 20

true

at small scale (bigger denominator), only the stream line in symbolized, by a single line.

Front 21

Which of the following is true about a line feature?

a. A line feature is made of lines

b. A line connects two end points.

c. The shape of a line is made of connected points.

d. All of the above.

Back 21

d. All of the above.

Front 22

The shapefile format is NOT topology-based

t/f

Back 22

True

Shapefiles are an implementation of the "spaghetti" vector model, where lines can intersect.

Front 23

A feature class can be stored in a geodatabase as a stand alone feature class or a feature class in a feature dataset.

t/f

Back 23

true

Front 24

ESRI coverage format is topology-based.

Back 24

true

This format inherited from ArcInfo stations is topology-based.

Front 25

In ArcMap, one can create a ________ made up of several maps.

Back 25

layout

Front 26

To do so, one needs to insert new ________ in the table of contents:

Back 26

data frames

Front 27

Only one at a time is active in the table of contents, but all are displayed in the layout view and they can be ________ at will.

Back 27

resized

Front 28

When a layout includes a main map and a zoom inset, the location of the inset can be shown on the map using an ________ set in the properties of the main data frame.

Back 28

extent indicator

Front 29

As an option, a ________ can be generated between the main map and the zoom

Back 29

leader

Front 30

4. RASTER DATA MODEL

Front 31

A raster with a larger cell size has a higher resolution than a raster with a smaller cell size

t/f

Back 31

false

Large cells are not very precise - they make low resolution raster datasets.

Front 32

A vegetation raster is most likely a _____ raster

a. integer

b. floating point

Back 32

a. integer

Vegetation type is a categorical information that will be coded by integer values.

Front 33

Which of the following is an example of a multiband raster?

a. An elevation raster

b. A vegetation raster

c. A satellite image

Back 33

c. satelite image

A satellite image is a composite of several measures in different frequency ranges.

Front 34

Which data structure stores raster data as a matrix and writes the cell values into a file by row and column?

a. Cell by cell

b. Run length code.

c. Quad tree

d. None of the above.

Back 34

a. Cell by cell

Front 35

Vectorization refers to the process of converting from ____________ data to _________ data:

a. raster, vector

b. vector, raster

c. vector, vector

d. raster, raster

Back 35

a. raster, vector

Front 36

if a raster has the cell resolution of 30 meters, then a cell in the raster measures:

a. 300 square meters

b. 600 square meters

c. 900 square meters

d. None of the above.

Back 36

c. 900 square meters

Front 37

Which data structure stores the cell values by row and by group?

a. Cell by cell

b. Run length code

c. Quad tree

d. None of the above Yes

Back 37

b. Run length code

RLE groups together similar consecutive value on a same row.

Front 38

5. DATA DISPLAY AND CARTOGRAPHY ch9

Front 39

Which color dimension in NOT suited for quantitative data?

a. hue

b. lightness (also called value)

c. saturation (also called chroma)

Back 39

a. hue

Variations of hue are used for qualitative data. Quantitative data are usually mapped thru value or chroma variation of the same hue. Quantitative ramps sometimes play slightly on hue variation in addition to value, but it has to strictly follow the rules of harmonic gradation. E.g. from yellow to orange to red to brown.

Front 40

Which of the following map types uses a specific symbol size for each value in the dataset?

a. the graduated symbol map

b. the proportional symbol map

Back 40

b. the proportional symbol map

each value is represented by a symbol of a specific proportional surface.

Front 41

For each map description below, indicates if this is a reference map, a thematic - qualitative map or a thematic - quantitative map.

1. Refernce maps

Back 41

-London Subway map

-Map of Major Watersheds and Rivers of Minnesota

Front 42

2. Qual

Back 42

-Map of election results: States colored red or blue for the winning party

-Land Use Map

Front 43

3. Quant

Back 43

-Map of median household income, at census track level

-Map of Air Temperature

Front 44

For each of the following map, choose the appropriate symbology in ArcGIS

1.

-Land Use Map

Back 44

Categories - Unique values

Front 45

2.

-Map of the number of votes for the incumbent candidate

-Map of the number of car crashes in a given year, by state

Back 45

Quantities - Graduated symbols or proportional symbols

Front 46

3.

-Map of the quality of water, by stream

-Map of the average student loan debt, by state

-Map of the percentage of votes for the incumbent candidate

Back 46

Quantities - Graduated colors

Front 47

6. DATA ACQUISITION

Front 48

Some GPS receiver can collect the elevation in addition to the horizontal position of a point on the Earth's surface.

T/F

Back 48

true

Not every type of GPS units and only if enough satellites are visible, but true.

Front 49

The standard coordinate system for GPS reading is:

a. NAD27

b. NAD83

c. WGS84

d. none of the above

Back 49

c. WGS84

Front 50

Which of the following is considered an automatic digitizing method?

a. digitizing using a scanner and a vectorization algorithm

b. digitizing using a digitizing table

c. on-screen digitizing

Back 50

a. digitizing using a scanner and a vectorization algorithm

With a digitizing table, all the work needs to be done manually.

With scanner and vectorization algorith however, operator may have to edit the results but most work is performed automatically.

Front 51

Which agency is in charge of the National Map program in the US?

a. U.S. Geological Survey

b. U.S. Census Bureau.

c. Natural Resources Conservation Service

d. Bureau of Land Management

Back 51

a. U.S. Geological Survey

Front 52

One can use the Internet to download GIS data from a web server.

t/f

Back 52

true