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GeoInformationSystems in Water Management 1 - QGIS > quizzes > Flashcards

quizzes Flashcards

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1
Q

Is the following statement correct?

“In the prevoew dataframe you can choose whether the data is displayed as a map (geography) or as a table.”

A

TRUE

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2
Q

What are the main options in organizing and managing GIS data by using QGIS Browser (ArcCatalog)?

A
  • Create, Copy, Delete data structures (geospatial data)
  • Change, Define various properties of geospatial data
  • Regard geodata in detail by using a zoom tool
  • using Toolbox for administration and processing tasks
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3
Q

Where is the defined point zero of the Geographical Coordinate System?

A

The defined point zero is at the intersection of prime-meridian and equator.

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4
Q

Is the following statement correct?

“Latitudes are northern or southern distances of an earth-surface-point from the equator, given in angular dimensions.”

A

TRUE

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5
Q

Geographical coordinates consist of longitude and latitude.

Define the coordinates of Aachen.

A

50° 47’ N

6° 05’ E

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6
Q

Are the following statements correct?

“Map projections show a flat picture (2D) of the earth’s surface.”

“The choice of projection determinates extent and type of the distortion.
It also determines a map’s suitability for the intended purpose.”

“The projection creates a transformation from a spherical or an elipsoid surface to a plain level following mathematical rules.”

A

TRUE
TRUE
TRUE

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7
Q

Which Gauß-Krüger zone is valid for Aachen?

A

Germany Zone 2 / Second Zone

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8
Q

Explain how to avoid negative coordinates for places western of the millde meridian in the Gauß-Krüger principle?

A

by adding 500.000m distance to the right of the central meridian
(Easting)

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9
Q

Is the following statement correct?

“To see two or mora layers in the same location and time you have to adjust “Label”-settings of the layers.”

A

WRONG

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10
Q

The ATKIS(=?) is a procedure of the AdV(=?). What is their aim?

(L1-1)

A

Offering Information about:

  • land cartography and
  • topographic mapping.

NOT grid-data; NOT hydrographic mapping

(ATKIS = Official Topographical Cartographic Information System)
(AdV = Arbeitsgemeinschaft der Vermessungsverwaltungen der Länder der Bundesrepublik Deutschland)
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11
Q

Which choices can not be changed in an attribute table? Which can?

(L1-2)

A

NOT: Geometry (shape), Object ID (FID)

can be changed in attribute table: Size (Area), Description (Name)

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12
Q

In which place of the displaying order is a new layer placed, when added?

(L1-3)

A

It is placed on top of the alredy existing layers.

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13
Q

Which functionalities provide geoinformation systems in relation to spatial data?

(L1-4)

A
  • management and display
  • analysis
  • presentation
  • registration
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14
Q

Which further Information contains every GIS-data besides the attribute-information (topic)?

(L1-5)

A

spatial information

It provides information about position and level of the geographic feature.

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15
Q

Which types of grid-data exist?

L1-6

A
  • topographic maps
  • digital elevation model

(NOT: hydraulic maps, ADV-model)

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16
Q

In GIS often vector data is used. Which vector data types exist?

(L1-7)

A
  • point
  • line
  • polygon
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17
Q

Is the following statement correct?

“Shapefiles are saving formats for vector data. They consist of at least 2 files.”

(L1-9)

A

WRONG

Shapefiles consist of at least 3 (sometimes even up to 11) files.

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18
Q

Is the following statement correct?

“Vector-data files are labelled with “.vdf” “

(L1-10)

A

WRONG

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19
Q

What are the main options in organizing and managing GIS data by using the QGIS Browser?

(L2-2)

A
  • Create, Copy, Delete data structures
  • Change + Define properties of geospatial data
  • Regard geodata in detail (zoom-tool)
  • Tools for administration and processing tasks
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20
Q

Is the following statement correct?

“With the (QGIS-)Browser you can access any folder directly.”

(L2-3)

A

WRONG

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21
Q

Which are the data frames the QGIS Browser consists of?

L2-4

A
  • Preview
  • Content
  • Description

(NOT: properties, editor, workspace)

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22
Q

Is the following statement correct?

“When creating new files in the Browser, the coordinate system can only be allocated in the Editor.”

(L2-6)

A

WRONG

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23
Q

Is the following statement correct?

“It is not possible to change the coordinate system of existing data in the Browser.”

(L2-7)

A

WRONG

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24
Q

Is the following statement correct?

“In the preview dataframe, you can choose whether the data is displayed as a map (geography) or as a table.”

(L2-8)

A

TRUE

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25
Q

Is the following statement correct?

“There a two types of tables, but only one type is relevant for working with QGIS.”

(L3-1)

A

WRONG

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26
Q

For every vector-dataset there is an attribute table, having an object-ID for every entry (point, line, polygon).
Make 3 statements about Attribute tables.

(L3-2)

A

Attribute tables …

  • contain descriptive information about geographic features
  • are automatically uploaded with the geo-data (shapefile etc)
  • ARE CONNECTED DIRECTLY to the geographic features
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27
Q

Is the following statement correct?

“There are not only attribute tables, but also factual data tables.”

(L3-3)

A

TRUE

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28
Q

Is the following statement correct?

“A spacial relation can only be created with a link to attribute tables.”

(L3-3)

A

TRUE

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29
Q

Is the following statement correct?

“Factual data tables are directly linked to geographical objects.”

(L3-3)

A

WRONG

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30
Q

Is the following statement correct?

“Factual data tables are part of every vector data set.”

(L3-3)

A

WRONG

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31
Q

Is the following statement correct?

“The calculation of ares by using ‘Calculate Geometry’ is dynamic.”

(L3-5)

A

WRONG

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32
Q

While adding a field to an attribute table the type ‘double’ can be chosen.
What determines the field characteristic ‘precision’?

(L3-6)

A

The number of clauses, saved in the field

NOT the number of decimals or a procentual deviation

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33
Q

You want to display ages of test persons in an attribute table.
Which data type do you use for the associated column?

(L3-7)

A

(Short) Integer

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34
Q

Is the following statement correct?

“There are 4 kinds of relationships that can be represented with join&relate.”

(L3-8)

A

WRONG

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35
Q

Is the following statement correct?

“Joins can link attribute tables to factual tables or other attribute tables. They are often used when there is a clear correlation between the target table and the source table.”

(L3-?)

36
Q

Additional descriptive data is generated when attributes of one table are added to another table.

Make 4 statements.

(L3-9)

A

Joins are based on a key-field that both tables have in common.

Changes of one table are automatically adopted.

Joins are saved in QGIS (or ArcMap).

No new table is generated.

37
Q

Is the following statement correct?

“Joins can link attribute tables to factual data tables or other attribute tables. They are often used when there is a clear correlation between the target table and the source table.”

(L3-10)

38
Q

Is the following statement correct?

“The Editor contains commands to create and edit data.”

(L4-1)

39
Q

Is the following statement correct?

“The Editor is used in the QGIS Browser.”

(L4-2)

40
Q

Explain “Digitizing”

L4-3

A

Conversion of features to a digital format.

41
Q

List 3 ways to make a selection in QGIS (or ArcMap)

L4-4

A

select by attribute
select by location

selection feature (cursor)

42
Q

What is the main usage for Online GIS?

L4-5

A

Distributing Information

NOT working remote in the same map, create zonings

43
Q

Mention 3 features that can be used in the Editor.

L4-6

A

Digitize Tool
Tracing Features
Cut Polygons Tool

(NOT: intersect, clip, go to point)

44
Q

Is the following statement correct?

“The calculated statistic of the attribute table only belongs to the selected features.”

(L4-7)

45
Q

Is it able to add another selection to an existing one?

L4-8

46
Q

Are the following statements correct?

“You can change the settings of a layer so that You cannot make a selection from it.”
(L4-9)

“The selection does not affect any editing.”
(L4-10)

A

TRUE

WRONG

47
Q

Is the following statement correct?

“The Buffer Tool can be used to create a defined distance to a physical unit.”

(L5-1)

A

TRUE

Buffers can be generated around physical units like points, lines, polygons.

48
Q

Which Tool is used to combine several shapefiles to a new shapefile?

(L5-2)

A

Merge

While merging, attributes can be chosen.

49
Q

A nationwide layer shall be reduces to one federal state. The final layer shall only contain the attributes of the input-layer.
Which Tool is used?

(L5-3)

A

Clip

Features of a layer are blended with an ancillary layer. The attributes of the input-shapefiles are equal to the attributes of the output-shapefiles.

(ancillary =untergeordnet)

50
Q

Clip and Intersect can blend two polygons.
Make 2 correct statements concerning the comparison of both.

(L5-4)

A

Clip writes only the attributes of the input-file in the new table.

Intersect writes the attributes of both files in the new table.

51
Q

Imagine there are 8 plots in an area, which are used differently by 40 inhabitants. Each plot has only one type of use, but is used by several inhabitants.
Your database consists of the inhabitants names, the type of use of its plot, the plot coordinates.

Which tool is used to keep only the type of use for further analysis?

(L5-5)

A

Dissolve

The Dissolve Tool can untie several objects with the same attribute from each other.

52
Q

Which 2 tools can be used to
combine two single polygons to one final polygon without their borders
(assuming both polygons have the same attributes)?

(L5-6)

A

Merge
The Merge Tool combines several single polygons into a new one.

Dissolve
Dissolving unites joined polygons into one.

53
Q

Is the following statement correct?

“Using the Intersect Tool, the result will only contain data from one of the input datasets.”

(L5-7)

54
Q

Is the following statement correct?

“There is more than one way to get access to the different Geoprocessing Tools.”

(L5-8)

55
Q

Is the following statement correct?

“With the Buffer Tool it is possible to dissolve the created buffer ares directly.”

(L5-9)

56
Q

Is the following statement correct?

“Merging means the reduction of lines while Dissolving means the reduction of data.”

(Give details about Merging and Dissolving.)

(L5-10)

A

WRONG

Merging

  • combines several single polygons into a new one without their borders
  • (attributes can be chosen)

Dissolving
- unites joined polygons into one
- can untie several objects with the same attribute from each other
- used to keep only the type of use for further analysis
- combines two single polygons to one final polygon without their borders
(assuming both polygons have the same attributes)

57
Q

Is it possible to create maps in the data view?

L6-1

58
Q

Which arrangements can be done?

???(in the data view) or (in the layout manager)???

(L6-2)

A

printer preferences
page setup
size and orientation of the map

(NOT font settings, scale settings)

59
Q

Is the following statement correct?

“Existing dataframes can be copied and inserted in other map documents.”

(L6-3)

A

TRUE

This simplifies the work on layouts.

60
Q

What is needed and what has to be done to create a poster showing several maps?

(L6-4)

A

Creating several data frames and inserting the required layers.

(DON’T create every map for its own, export maps in pictures and combine them in another application)

61
Q

How can a scale be defined in the layout manager?

L6-5

A

Choosing a scale from the drag-and-drop list.

Setting the scale in the dataframe settings.

62
Q

List 3 types of grids that can be created in QGIS.

L6-6

A

Measured Grid
Graticule Grid
Reference Grid

63
Q

List 7 properties that every map document should contain.

L6-7

A 
North arrow
Scale bar
Author's name
Scale text
Grid
Legend
Title
64
Q

Is the following statement correct?

“Photos can only be added to specific points if they are geotagged.”

(L6-8)

65
Q

Is the following statement correct?

“The division unit, the number of divisions and subdivisions can not be changed manually.”

(L6-9)

66
Q

Is the following statement correct?

“For both grids and legends there are wizards to help creating these features.”

(L6-10)

67
Q

Is the following statement correct?

“A combination of vectordata and griddata for analysis is not possible.”

(spatial analysis)
(L7-1)

68
Q

The Spatial Analyst is needed to analyse grid data.
List 3 possible actions and 1 that is not possible.

(L7-2)

A

possible actions:
Calculating grids
Converting grids
Analysis of surfaces (DTM)

NOT possible: Choosing attributes

69
Q

List 3 types of terrain measurement.

Which terrain measurement has the lowest inaccurary concerning heights?

(spatial analysis)
(L7-3)

A

DTM 5
DTM 25 = DGK 25
Laserscanning

most accurate concerning heights:
Laserscanning
(inaccurary is about 0.1 m)

70
Q

Do contour lines have to be implemented in the DTM or can they be generated afterwards?

(spatial analysis)
(L7-4)

A

Contour lines DO NOT have to be implemented in the DTM.

They CAN be generated afterwards.

71
Q

Using the contour tool of the Spatial Analyst to generate contour lines, a certain factor can be selected.

Name the factor and describe its purpose.

(L7-5)

A

The z-factor is used to..

  • adjust the z-coordinates to the x,y-coordinates.
  • convert the height-coordinates unit to the x,y-coordinates unit.

(Often they are converted into cm because integer is a suitable type for calculations.)

72
Q

Describe the meaning of “Hillshades”.

L7-6

A

Hillshades:

Creating a spatial impression to the relative height differences of a terrain.

73
Q

List (and define) the necessary information for a Hillshade of a DTM.

(L7-7)

A

Azimuth
The Azimuth declares the direction of a light source that lights a surface (in degrees).

Altitude
The Altitude represents the angle of the light source over the horizon.

74
Q

Is the following statement correct?

“Every cell in the shadow gets the value “0”

(L7-8)

75
Q

Give the geometric formula to calculate the degree of slope.

L7-9

A

arctan(height/length)

76
Q

What information does the data description DGK25 provide?

L7-10

A
  • digital topographic map

- data in scale 1:25.000

77
Q

List the partial steps of sub-basin creation.

L8-1

A
  1. Digital Terrain Model
  2. Flow Direction
  3. Flow Accumulation
  4. water network
  5. Sub-basins
78
Q

Is the following statement correct?

“For the calculation of a basin you use the initial DEM for all calculation steps.

(L8-2)

79
Q

List 3 tools that are part of hydrology modelling.

L8-3

A

Watershed
Fill
Flow Accumulation

80
Q

Is the following statement correct?

“We have to fill sinks, because we do not want to consider lakes or ponds in our calculations.”

(L8-4)

81
Q

Is the following statement correct?

“According to the method of Strahler, the stream order only increases when two streams of the same order intersect.”

(L8-5)

82
Q

Is the following statement correct?

“If a stream of order 4 and a stream of order 2 intersect,
which stream order does the resulting stream have
according to Shreve?

(L8-6)

83
Q

The Rhine Basin consists of how many major subbasins?

L8-7

A

??

NOT nine

84
Q

How many possible directions do exist when calculating the flow direction of water in a grid?

(L8-8)

A

8

When calculating the flow direction of water in a grid, there are eight possible directions.

85
Q

What is the Pour Point?

L8-9

A

the Pour Point:

the point on the surface where water flows out of the area

86
Q

Is the following statement correct?

“Pour points can easily be calculated with the “pour point” tool.”

(L8-10)

GeoInformationSystems in Water Management 1 - QGIS (14 decks)

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