GIS EXAM PRACTICE EXAM WITH
COMPLETE SOLUTIONS
A spatial join is similar to an attribute join except that instead of using common field to
decide which rows in the table match, the locations of features are used. Spatial joins
depends on containment or proximity criterion. spatial joins create a new feature class,
unlike attribute joins which appends source attributes to the destination table. - ANS-
What primary characteristics distinguishes a spatial join from an attribute join?
a clip works like a cookie cutter to truncate the features of one file based on the outline
of another. select by location is a spatial query just based on if one feature is within,
intersect or near a feature - ANS-How does the clip function differ from select by
location ?
Line layer. the output retains the features of the destination layer and appends the
attribute information from source layer. The destination layer feature class determines
the types of the features in the output feature class. - ANS-If a polygon feature type is
joined to a line layer, with the lines as the destination table, what will the feature type of
the output layer be?
a join will be done. the cardinality is many to one. there are many courses to one
student number - ANS-Student number table is the destination
the cardinality is one to many therefore a relate can be done. there is one student
number to many courses. - ANS-if courses attended table is the destination table
a. many to one
b. many to one
c. many to one
d. one to one - ANS-What is the cardinality of each of the following relationship
a. Minerals to lithology
b. Sample points to sample ID
c. sample to element concentration
d. element concentration to sample point
- ANS-Describe the geological setting and host rock to mineralisation
Assay
Collar
Survey
, lithology - ANS-Describe the essential information required in a drill hole database for
3D geological modelling
block function - moves the window such that it does not overlap with the previous
window but produces new side by side adjacent windows that are independent of each
other.
focal function- centers the window on a cell called the target. it calculates the statistics
for the neighbourhood and assigns the value to the target cell and repeats the process
at the next adjacent cell - ANS-Describe the two types of neighborhood functions in GIS
The coordinate system will be projected if the output is placed in a feature dataset, the
coordinate system will always match that of the data feature dataset. if the cs is set in
the environment settings and the output will not become part of the feature dataset, but
setting coordinate system is used. - ANS-what determines the coordinate system of the
output when overlay is used?
Zonal operations are similar to focal operatyions except that the definition of the
neighbourhood in a zonal operation is the configurattion of the zone themselves, not a
specified neighbourhood shape.
neighbourhood statistics are output as new raster layers
zoneal dont need to be contagious
zonal produces two types of output. raster and table - ANS-explain the difference
between zonal statistics and neighborhood function in GIS
because a gcs uses units of decimal degrees, which cannnot be easily converted into
decimal miles or kilometers. the result could be invalid because the geographic
coordinate system uses spherical coordinates - ANS-Why should distance joins always
be performed on layers with a projected coordinate system? What kind of projection
should be used?
It would be best to use azimuth projection - ANS-what additional considerations should
be added
join appends the attribute from one table to another based on a common field
relate defines the relationship between two tables based on a common field but does
not append the attributes of one to another - ANS-describe the difference between a
join and a relate
map overlay combines two layers to create a new output fc containing info from both the
inputs.
a spatial join simply combines the attributes tables and does not alter the geography in
any way. - ANS-Explain the most important differences between a spatial join and map
overlay
COMPLETE SOLUTIONS
A spatial join is similar to an attribute join except that instead of using common field to
decide which rows in the table match, the locations of features are used. Spatial joins
depends on containment or proximity criterion. spatial joins create a new feature class,
unlike attribute joins which appends source attributes to the destination table. - ANS-
What primary characteristics distinguishes a spatial join from an attribute join?
a clip works like a cookie cutter to truncate the features of one file based on the outline
of another. select by location is a spatial query just based on if one feature is within,
intersect or near a feature - ANS-How does the clip function differ from select by
location ?
Line layer. the output retains the features of the destination layer and appends the
attribute information from source layer. The destination layer feature class determines
the types of the features in the output feature class. - ANS-If a polygon feature type is
joined to a line layer, with the lines as the destination table, what will the feature type of
the output layer be?
a join will be done. the cardinality is many to one. there are many courses to one
student number - ANS-Student number table is the destination
the cardinality is one to many therefore a relate can be done. there is one student
number to many courses. - ANS-if courses attended table is the destination table
a. many to one
b. many to one
c. many to one
d. one to one - ANS-What is the cardinality of each of the following relationship
a. Minerals to lithology
b. Sample points to sample ID
c. sample to element concentration
d. element concentration to sample point
- ANS-Describe the geological setting and host rock to mineralisation
Assay
Collar
Survey
, lithology - ANS-Describe the essential information required in a drill hole database for
3D geological modelling
block function - moves the window such that it does not overlap with the previous
window but produces new side by side adjacent windows that are independent of each
other.
focal function- centers the window on a cell called the target. it calculates the statistics
for the neighbourhood and assigns the value to the target cell and repeats the process
at the next adjacent cell - ANS-Describe the two types of neighborhood functions in GIS
The coordinate system will be projected if the output is placed in a feature dataset, the
coordinate system will always match that of the data feature dataset. if the cs is set in
the environment settings and the output will not become part of the feature dataset, but
setting coordinate system is used. - ANS-what determines the coordinate system of the
output when overlay is used?
Zonal operations are similar to focal operatyions except that the definition of the
neighbourhood in a zonal operation is the configurattion of the zone themselves, not a
specified neighbourhood shape.
neighbourhood statistics are output as new raster layers
zoneal dont need to be contagious
zonal produces two types of output. raster and table - ANS-explain the difference
between zonal statistics and neighborhood function in GIS
because a gcs uses units of decimal degrees, which cannnot be easily converted into
decimal miles or kilometers. the result could be invalid because the geographic
coordinate system uses spherical coordinates - ANS-Why should distance joins always
be performed on layers with a projected coordinate system? What kind of projection
should be used?
It would be best to use azimuth projection - ANS-what additional considerations should
be added
join appends the attribute from one table to another based on a common field
relate defines the relationship between two tables based on a common field but does
not append the attributes of one to another - ANS-describe the difference between a
join and a relate
map overlay combines two layers to create a new output fc containing info from both the
inputs.
a spatial join simply combines the attributes tables and does not alter the geography in
any way. - ANS-Explain the most important differences between a spatial join and map
overlay
