問題一覧
1
essential tools of statistical analysis
descriptive statistics, histogram or frequency counts, extreme values, correlation and cross-tabulation
2
2 types of spatial operations
connectivity and neighbourhood operations
3
involves increasing the size of the elemental unit in the database
spatial aggregation
4
locating maximum or minimum values in an area
extreme values
5
for the purpose of area and measurement and multiple attribute modeling
mathematical overlay
6
higher order statistical moments like coefficient of skewness and kurtosis
descriptive statistics
7
useful for proximity analysis
buffer
8
methods of defining new values for locations using the values of other locations
context operators - neighbourhood functions
9
used to compare the attributes in two datalayers by determining the joint distribution of attribute
cross-tabulation
10
involve the compositioning or extracting multiple maps in order to create a new dataset
polygon overlay
11
3 types of map dissolve
centroid determination, data structure conversion, spatial operations
12
extract single attribute from a multiple attribute polygon
map dissolve
13
a zone around a map feature measured in units of distance and time
buffer
14
measurement task that includes a point in polygon and enumeration of points inside the polygon
point
15
defines an area of influence around its sample point, so that any location is closer to that point than any of the sample points
thiessen polygon
16
a syntax for retrieving and manipulating data from a relational base
structured query language
17
mean, median, and variance values in a data layer
descriptive statistics
18
data may not be compatible with the user need or for further analysis
reclassification and aggregation
19
deals with the discovery of general principles underlying the total phenomenon
data analysis
20
example of context operators
slope, hillshading, flow accumulation
21
measurement task is cutting and filling
volume
22
polygons generated from a set of sample points
thiessen polygon
23
analytical tools and operations in GIS
data query, map algebra, distance operators, context operators, geoprocessing
24
data may not be compatible with the user need or for further analysis
reclassification and aggregation
25
calculation is straight forward in raster layer
histogram or frequency counts
26
data may be at different resolution than needed by the user
reclassification and aggregation
27
a set of techniques wherein distance is the primary concern of the analysis
distance operators
28
map abstraction consists of
calculation of centroid, automatic contouring, proximal mapping, reclassification, conversion to grid
29
measurement tasks are
point, distance, area and perimeter, volume
30
operations in data manipulation and analysis
reclassification and aggregation, geometric operations
31
conversion from one format of data structure to another
data structure conversion
32
asks a question about stored information associated to geographic features
database query
33
also known as neighbourhood or local operators
context operators
34
comparison of spatial distribution of attributes in two or more data layer
correlation and regression
35
for raster datasets only
spatial aggregation
36
regions of less than a specified size is ignored for a particular application
spatial aggregation
37
average location of a line or polygon
centroid
38
what are geometric operations
rotation, translation, scaling, rectification
39
used in both categorical and continuous variables
analysis of variance
40
a language that defines a syntax for combining map themes by applying mathematical operations and analytical functions to create a new map theme
map algebra
41
center of a mass of a two-or-three dimensional object
centroid
42
data may not be compatible with the user need or for further analysis
reclassification and aggregation
43
deals with handling spatial data for a particular purpose
data manipulation
44
displays the distribution of attribute value in a layer/region
histogram or frequency counts
45
generation of new polygon from points, lines, and polygon features in the database
buffer generation
46
data may be at different resolution than needed by the user
reclassification and aggregation
47
measurement task is linear and curvilinear
distance