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GIS 551 > Midterm Review > Flashcards

Midterm Review Flashcards

1
Q

Why don’t you hide filename extensions?

A

Because filename extensions tell the user what type of information is stored in that particular file

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2
Q

Why is GIS separated from other information systems?

A

Because GIS has the ability to create, maintain, and analyze geographic or spatial data

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3
Q

List the 4 major filename extensions and functions.

A
  1. shp - feature geometry
  2. prj - projection information
  3. shx - positional index
  4. dbf - attribute format
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4
Q

Who is recognized as the father of GIS?

A

Roger Tomlinson

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5
Q

Which agency develops Tiger dataset?

A

US Census Bureau

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6
Q

Who studied the locations of cholera death and well location in 1854?

A

John Snow

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7
Q

Precision vs. Accuracy.

A

Precision: values are close together
Accuracy: how close to true value

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8
Q

Which is a model that approximates the shape and size of the Earth?

A

All of the above (Spheroid, Ellipsoid, Geoid)

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9
Q

What is the true nature of NAD 83?

A

Referenced to the Earth’s…

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10
Q

Know how to calculate bits and bytes.

A

10,240

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11
Q

In a PC (personal computer), which part is the temporary holding area for data before and after they are processed by the CPU?

A

RAM

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12
Q

Which of the following features is an example of a continuous feature?

A

Elevation

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13
Q

Which statement is NOT true for file geodatabase in ArcGIS?

A

It has the limit of 2GB

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14
Q

Which of the following statements is true about geographic coordinate system G.C. S.?

A

Using angular distance to assign location

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15
Q

Which of the following statements is true?

A

Both a and b

  • A coordinate system always has a datum
  • A coordinate system may be based on different datums
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16
Q

What is the filename extension for ArcInfo interchange file?

A

e00

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17
Q

Which ArcGIS tool lets you project a shapefile from GCS to UTM?

A

Project

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18
Q

Which following statement is NOT true about the topology in vector data?

A

Storing the spatial reference information

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19
Q

Which topology definition is used for linear network analysis such as hydrology since it describes the direction of a link?

A

Connectivity

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20
Q

Based on Federal Geographic Data Committee (FGDC) metadata standards, under which item can you find the projection and coordinate system of a geodataset?

A

Spatial reference

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21
Q

Which file is missing when the name of the XY Coordinate System for a shapefile shows “UnKNOWN”?

A

Prj

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22
Q

Which file is missing when the name of the XY Coordinate System for a shapefile shows “UNKNOWN”?

A

Prj

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23
Q

Which ArcGIS Desktop and RDBMS (relational database management system) where spatial data is stored?

A

ArcSDE

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24
Q

What type of GIS data is field based?

A

Raster

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25
Q

Which level of ArcGIS for desktop we do use in the GIS labs?

A

Advanced (ArcInfo)

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26
Q

Which file format is NOT used for tabular data?

A

TIF

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27
Q

What is the digitally scanned representation of the USGS 7.5 minute series quadrangle maps?

A

DRG

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28
Q

Which statement is true for raster dataset when compared with vector?

A

The computational efficiency is high

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29
Q

Which Landsat satellite is most recent one that was launched February 2013?

A

Landsat 8

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30
Q

Which data format is NOT for sata interchange in GIS?

A

MXD

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31
Q

In a PC (personal computer, which part is battery powered so that the date/time check continues working when the computer is off?

A

CMOS

32
Q

What is the equivalence when a shapefile is imported into a geodatabase?

A

Feature Class

33
Q

List four of the five common formats for image output?

A
  1. BMP - windows bitmap
  2. GIF - graphic interchange format
  3. JPEG - joint photographic experts group
  4. PDF - adobe portable document format
  5. TIF - tagged image file
34
Q

Name the three projected coordinate systems

A
  1. UTM - Univsal transverse Mercator
  2. SPC - state planar coordinate
  3. TSMS - Texas Statewide Mapping System
35
Q

Draw the three types of map projection surfaces.

A
  1. Conical
  2. Cylindrical
  3. Planar (3D plane with globe on top)
36
Q

What are the differences between GCS and PCS?

A

jhjffjh

37
Q

Why is it called “heads up” digitization?

A

Heads up digitization is named that way because the user is working with his/her head up, looking at a computer monitor

38
Q

How do you find “sliver”?

A

Slivers are found by calculating the area first, in attribute table assort into ascending order (small areas), then saving the area values.

39
Q

A contour map ____ be used for all continuous measurements.

A

Can

40
Q

Which results in the same number of features in each class?

A

Quantile

41
Q

_____ is NOT used as a soft copy of a map.

A

MXD

42
Q

Which is an example of a discrete feature?

A

Stream

43
Q

A _______ has a size limit of 2 GB.

A

Personal geodatabase

44
Q

Topology must be set at the level of ______.

A

Feature dataset

45
Q

______ use color schemes to represent county populations.

A

Thematic and Chloropleth maps

46
Q

______ uses two different projection methods.

A

State Plane

47
Q

Which tool processes GIS data based on attribute values?

A

Dissolve

48
Q

Which tool combines a sliver to its adjacent polygon?

A

Eliminate

49
Q

Which tool is the opposite of clip?

A

Erase

50
Q

What measures the magnitude of features located in the wrong place?

A

Positional errors

51
Q

Which tool allows breaking input features based on another polygon datasets?

A

Split

52
Q

Quotation marks surround text in SOL?

A

True

53
Q

Which tools combine features from multiple datasets into single datasets?

A

Append and Merge

54
Q

Float vs. Double.

A
  • Float: 4 bit #, stores up to 7 sig. digits

- Double: 8 bit #, store up to 15 sig. digits

55
Q

Which ArcGIS extension enables the conversion from an ArcMap document (MXD) to a published map file (PMF)?

A

ArcGIS Publisher

56
Q

Which datum is used in GPS operation?

A

Both a and c (NAD 83, WGS 84)

57
Q

The map projection used for the Texas Statewide Mapping System?

A

Lambert conformal conic

58
Q

A UTM zone has [ ] where the distortion is minimum.

A

Two standard meridians

59
Q

Who is the author of the classic map overlay book “Design with Nature”?

A

Ian McHarg

60
Q

Which of the following events did NOT occur in the 80s?

A

ESRI (Environmental Systems Research Institute) formed

61
Q

When organizing feature classes into a feature dataset in geodatabase, it works similar to the non-geodatabase GIS data format of…?

A

Coverage

62
Q

Which dataset is NOT an example of raster data?

A

TIN

63
Q

Which file serves as the index linking between the geometry and the attributes in a shapefile?

A

shx

64
Q

T or F, one can use both vector data and raster data in a GIS project.

A

True

65
Q

Which tool in ArcGIS requires that an existing output dataset be in place?

A

Append

66
Q

What is the output feature type from a point-in-polygon overlay process using Intersect tool?

A

Point

67
Q

Which database design dominates the field of information management?

A

Relational database

68
Q

T or F, a dBase file with dbf extension can be added and viewed in ArcMap.

A

True

69
Q

Which data format does NOT have the georelational data structure?

A

Geodatabase

70
Q

T or F, when joining two tables in ArcGIS, the field of primary key and the field of foreign key have to be exactly the same name and same type.

A

False

71
Q

What ArcGIS extension is required for surface analysis such as deriving slope from a DEM?

A

Spatial analyst

72
Q

What is GIS?

A

A computer system for capturing, storing, querying, analyzing, and displaying geospatial data.

73
Q

What separates GIS from other information systems?

A

The capability to create, maintain, and analyze geographically referenced or spatial data.

74
Q

Geographic Coordinate System (GCS)

A

Spherical Coordinate System; measured in angle (degree-minute-second) (longitude, latitude)

75
Q

Planar Coordinate System (PCS)

A

Projected Coordinate System; measured in distance (meter/feet) (X, Y)

GIS 551 (2 decks)

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