lecture 5

Question 1

what is a query

Answer 1

request to select feature records from database

Question 2

what is a query in GIS

Answer 2

selection of data by attributes or location

Question 3

what is attribute query asking

Answer 3

asking for the raw data from the query

Question 4

what is spatial data query

Answer 4

making new data using query

Question 5

what is spatial analysis

Answer 5

processing of examining the location attributes and relationship of feature in spatial da ara through overlay and other analytical techniques in order to address a question

Question 6

example of spatial analysis (4)

Answer 6

local vs focal
spatial aggregation filtering

Question 7

spatial analysis local what

Answer 7

per cell operation

Question 8

what does focal spatial alteration allow

Answer 8

down sampling raster to make number of cell less higher to low

Question 9

density in raster

Answer 9

count the number of incidence within radius

Question 10

what do you control when calculating density in raster

Answer 10

resolution search radius (circle) shape of the neighbourhood

Question 11

kernel density useful for

Answer 11

empirical model provides Way to visualise and quantify points of posters of hotspots were local density is high

Question 12

spatial analysis vector clip what is it

Answer 12

overlay a polygon on one or more and extract feature cookie cutter

Question 13

what does clip create

Answer 13

new geometry therefore is analysis

Question 14

spatial analysis vector union what is it

Answer 14

adding one feature to another making a feature with different shape

Question 15

what is union in spatial analysis vector

Answer 15

adding one feature to another making a feature with different shape

Question 16

what does union create

Answer 16

new geometry example of analysis

Question 17

spatial analysis vector reclassification what is it

Answer 17

renaming information to data w same value decrease amount of data overall

Question 18

spatial analysis raster reclassification what is

Answer 18

reclassifying information in cells so its easier to digest

Question 19

what does reclassification create

Answer 19

new attribute information

Question 20

spatial analysis dissolve vector

Answer 20

removing boundaries that has same values

Question 21

what does dissolve create

Answer 21

new geometry

Question 22

spatial analysis vector buffer

Answer 22

select area around specific areas

Question 23

what does buffer create

Answer 23

new polygon

Question 24

what is network analysis

Answer 24

network consisting of vertices and edges

Question 25

what can network analysis have

Answer 25

rules such as no turning right

Question 26

what problems can network analysis solve

Answer 26

some for shortest paths most optimal parh