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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
Which level of ArcGIS for desktop we do use in the GIS labs?
Advanced (ArcInfo)
26
Which file format is NOT used for tabular data?
TIF
27
What is the digitally scanned representation of the USGS 7.5 minute series quadrangle maps?
DRG
28
Which statement is true for raster dataset when compared with vector?
The computational efficiency is high
29
Which Landsat satellite is most recent one that was launched February 2013?
Landsat 8
30
Which data format is NOT for sata interchange in GIS?
MXD
31
In a PC (personal computer, which part is battery powered so that the date/time check continues working when the computer is off?
CMOS
32
What is the equivalence when a shapefile is imported into a geodatabase?
Feature Class
33
List four of the five common formats for image output?
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
Name the three projected coordinate systems
1. UTM - Univsal transverse Mercator 2. SPC - state planar coordinate 3. TSMS - Texas Statewide Mapping System
35
Draw the three types of map projection surfaces.
1. Conical 2. Cylindrical 3. Planar (3D plane with globe on top)
36
What are the differences between GCS and PCS?
jhjffjh
37
Why is it called "heads up" digitization?
Heads up digitization is named that way because the user is working with his/her head up, looking at a computer monitor
38
How do you find "sliver"?
Slivers are found by calculating the area first, in attribute table assort into ascending order (small areas), then saving the area values.
39
A contour map ____ be used for all continuous measurements.
Can
40
Which results in the same number of features in each class?
Quantile
41
_____ is NOT used as a soft copy of a map.
MXD
42
Which is an example of a discrete feature?
Stream
43
A _______ has a size limit of 2 GB.
Personal geodatabase
44
Topology must be set at the level of ______.
Feature dataset
45
______ use color schemes to represent county populations.
Thematic and Chloropleth maps
46
______ uses two different projection methods.
State Plane
47
Which tool processes GIS data based on attribute values?
Dissolve
48
Which tool combines a sliver to its adjacent polygon?
Eliminate
49
Which tool is the opposite of clip?
Erase
50
What measures the magnitude of features located in the wrong place?
Positional errors
51
Which tool allows breaking input features based on another polygon datasets?
Split
52
Quotation marks surround text in SOL?
True
53
Which tools combine features from multiple datasets into single datasets?
Append and Merge
54
Float vs. Double.
- Float: 4 bit #, stores up to 7 sig. digits | - Double: 8 bit #, store up to 15 sig. digits
55
Which ArcGIS extension enables the conversion from an ArcMap document (MXD) to a published map file (PMF)?
ArcGIS Publisher
56
Which datum is used in GPS operation?
Both a and c (NAD 83, WGS 84)
57
The map projection used for the Texas Statewide Mapping System?
Lambert conformal conic
58
A UTM zone has [ ] where the distortion is minimum.
Two standard meridians
59
Who is the author of the classic map overlay book "Design with Nature"?
Ian McHarg
60
Which of the following events did NOT occur in the 80s?
ESRI (Environmental Systems Research Institute) formed
61
When organizing feature classes into a feature dataset in geodatabase, it works similar to the non-geodatabase GIS data format of...?
Coverage
62
Which dataset is NOT an example of raster data?
TIN
63
Which file serves as the index linking between the geometry and the attributes in a shapefile?
shx
64
T or F, one can use both vector data and raster data in a GIS project.
True
65
Which tool in ArcGIS requires that an existing output dataset be in place?
Append
66
What is the output feature type from a point-in-polygon overlay process using Intersect tool?
Point
67
Which database design dominates the field of information management?
Relational database
68
T or F, a dBase file with dbf extension can be added and viewed in ArcMap.
True
69
Which data format does NOT have the georelational data structure?
Geodatabase
70
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.
False
71
What ArcGIS extension is required for surface analysis such as deriving slope from a DEM?
Spatial analyst
72
What is GIS?
A computer system for capturing, storing, querying, analyzing, and displaying geospatial data.
73
What separates GIS from other information systems?
The capability to create, maintain, and analyze geographically referenced or spatial data.
74
Geographic Coordinate System (GCS)
Spherical Coordinate System; measured in angle (degree-minute-second) (longitude, latitude)
75
Planar Coordinate System (PCS)
Projected Coordinate System; measured in distance (meter/feet) (X, Y)

GIS 551 (2 decks)

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