The Geo 365 Midterm

Front 1

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

Back 1

Geographic information system GIS

Front 2

These describe both the location and characteristics of spatial features

Back 2

Geospatial data

Front 3

3 commonly used Datums, What is a datum

Back 3

NAD27, NAD83, WGS84, The basis for calculating the geographic coordinates of a location

Front 4

4 Distortions of a map

Back 4

Size, Shape, area, or distance

Front 5

4 common projected coordinate systems

Back 5

UTM grid System, UPS Grid system, SPC system, PLSS

Front 6

A text file that stores information on the coordinate system that a data set is based on

Back 6

Projection file

Front 7

Coverage in a Georelational DATA model is _______ and the shapefile is ___

Back 7

Topological and nontopological

Front 8

Topology = 4 things

Back 8

adjacency, containment, intersection and distance

Front 9

What is metadata

Back 9

Provides information about geospatial data, important when using public information in a GIS project

Front 10

2 important types of field data are

Back 10

GPS data and survey DATA

Front 11

A study of geometry and algebra, provides the methods for creating geospatial data of points, lines, and polygons from survey data

Back 11

Coordinate geometry (COGO)

Front 12

What can significantly reduce noise errors in field data

Back 12

Differential correction

Front 13

An attribut table that has access to the geometries of features

Back 13

Feature Attribute table

Front 14

A table that does not have direct access to the feature geometry buthas a field linking the table to the feature attribute table whenever necessary

Back 14

Nonspatial attribut table

Front 15

These describe different kinds or different categories of data such as land-use types or soil types

Back 15

Nominal data

Front 16

These differentiate data by a ranking relationship, for example, soil erosion may be ordered from severe to moderate to light

Back 16

ordinal data

Front 17

These have known intervals between datavalues, a temperature reading of 70 is warmer than 10

Back 17

interval data

Front 18

Same as interval data except that this data is based on a meaningful, or absolute, ZERO value

Back 18

Ratio data

Front 19

these data include nominal and ordinal scales

Back 19

categorical data

Front 20

These data include interval and ratio scales

Back 20

Numerical data

Front 21

A collection of tables or relations that can be connected to each other by keys

Back 21

Relational database

Front 22

Difference between Foriegn and primary key

Back 22

Foriegn is another table for the purpose of linkage while the primary is one or more attributes whose values can uniquely id a record in a table

Front 23

This means that one and only one record in a table is related to one and only one record in another table

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one-to-one relationship

Front 24

one record in a table may be related to many records in another table, example

Back 24

One to many relationship, street address to an apartment complex= many houses

Front 25

Many records in a table may be related to one record in another, example

Back 25

many to one relationship, Several households may share the same street address

Front 26

This means that many records in a table may be related to many records in another table, example

Back 26

MAny to many relationship, a timber stand can grow more than one species and a species can gow in more than one stand

Front 27

A data query language designed for relational databases

Back 27

SQL, structured query language

Front 28

How do you use and SQL, 3 steps

Back 28

Italic key words , Select <attribute list>
From<relation>
Where<condition>

Front 29

One Line of tangency vs 2 lines of tangency

Back 29

Simple vs Secant

Front 30

What is larger 1:100 or 1:10000

Back 30

1:1000000 it means 1 foot on the map = 100000 feet in real life

Front 31

Whats the scale of a GIS map?

Back 31

their scaleless because they can zoom in and out

Front 32

1:1 or 1:10 which has more distortion

Back 32

1:10

Front 33

When were the first GPS satellites launched and when were they used by gov't then public

Back 33

1970, 1980, 2000

Front 34

How many satellites?

Back 34

27-29

Front 35

How does GPS work, 1 word

Back 35

triangulation

Front 36

Example of feature data model?

Back 36

lake, house, road

Front 37

Example of Field data model

Back 37

watershed, soil makeup

Front 38

Vector uses what data model

Back 38

Feature

Front 39

Raster use what data model

Back 39

Field

Front 40

Difference between Georelational and object-oriented

Back 40

georelational- geometery and attribute data split, object oriented- geometry and attribute together

Front 41

The key to GIS

Back 41

To link spatial data of geographic features to attribute data