Calculate population in SpatialPolygonDataFrame
I have a question regarding a calculation I have to do.
I have the following dataset:
- a SpatialPolygonDataFrame called
SPDFwhich consists of polygons with numerous attributes
Since I intersected this SPDF previously I want to calculate the population based on the new shapes of every polygon.
I have in my SPDF a variable called PopulationPerSQM which is basically the population per square meters. All I need to do now, is going through every polygon inside the SPDF and simply calculate:PopulationPerSQM*Area. However I do not know how to iterate through a SpatialPolygonDataFrame and to then calculate for each polygon inside it the population. Anybody has an idea how to do that or can link me to the solution please?
r
asked Nov 11 at 11:07
Cliff
86
add a comment |
I have a question regarding a calculation I have to do.
I have the following dataset:
- a SpatialPolygonDataFrame called
SPDFwhich consists of polygons with numerous attributes
Since I intersected this SPDF previously I want to calculate the population based on the new shapes of every polygon.
I have in my SPDF a variable called PopulationPerSQM which is basically the population per square meters. All I need to do now, is going through every polygon inside the SPDF and simply calculate:PopulationPerSQM*Area. However I do not know how to iterate through a SpatialPolygonDataFrame and to then calculate for each polygon inside it the population. Anybody has an idea how to do that or can link me to the solution please?
r
asked Nov 11 at 11:07
Cliff
86
A reproducible example would be very helpful here.
– Julius Vainora
Nov 11 at 11:09
Are you familiar with the str(SPDF) command and the $ and @ operators that would allow you to access different parts of the spatial polygon data frame?
– Tomas
Nov 11 at 11:11
add a comment |
I have a question regarding a calculation I have to do.
I have the following dataset:
- a SpatialPolygonDataFrame called
SPDFwhich consists of polygons with numerous attributes
Since I intersected this SPDF previously I want to calculate the population based on the new shapes of every polygon.
I have in my SPDF a variable called PopulationPerSQM which is basically the population per square meters. All I need to do now, is going through every polygon inside the SPDF and simply calculate:PopulationPerSQM*Area. However I do not know how to iterate through a SpatialPolygonDataFrame and to then calculate for each polygon inside it the population. Anybody has an idea how to do that or can link me to the solution please?
r
asked Nov 11 at 11:07
Cliff
86
I have a question regarding a calculation I have to do.
I have the following dataset:
- a SpatialPolygonDataFrame called
SPDFwhich consists of polygons with numerous attributes
Since I intersected this SPDF previously I want to calculate the population based on the new shapes of every polygon.
I have in my SPDF a variable called PopulationPerSQM which is basically the population per square meters. All I need to do now, is going through every polygon inside the SPDF and simply calculate:PopulationPerSQM*Area. However I do not know how to iterate through a SpatialPolygonDataFrame and to then calculate for each polygon inside it the population. Anybody has an idea how to do that or can link me to the solution please?
r
r
asked Nov 11 at 11:07
Cliff
86
asked Nov 11 at 11:07
Cliff
86
asked Nov 11 at 11:07
Cliff
86
asked Nov 11 at 11:07
Cliff
86
asked Nov 11 at 11:07
Cliff
86
86
A reproducible example would be very helpful here.
– Julius Vainora
Nov 11 at 11:09
Are you familiar with the str(SPDF) command and the $ and @ operators that would allow you to access different parts of the spatial polygon data frame?
– Tomas
Nov 11 at 11:11
add a comment |
A reproducible example would be very helpful here.
– Julius Vainora
Nov 11 at 11:09
Are you familiar with the str(SPDF) command and the $ and @ operators that would allow you to access different parts of the spatial polygon data frame?
– Tomas
Nov 11 at 11:11
A reproducible example would be very helpful here.
– Julius Vainora
Nov 11 at 11:09
A reproducible example would be very helpful here.
– Julius Vainora
Nov 11 at 11:09
Are you familiar with the str(SPDF) command and the $ and @ operators that would allow you to access different parts of the spatial polygon data frame?
– Tomas
Nov 11 at 11:11
Are you familiar with the str(SPDF) command and the $ and @ operators that would allow you to access different parts of the spatial polygon data frame?
– Tomas
Nov 11 at 11:11
add a comment |
1 Answer
1
active
oldest
votes
@Tomas: I got it using SPDF$Population<-round(SPDF$aream2*SPDF$PopPerSQM)
answered Nov 11 at 12:30
Cliff
86
add a comment |
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1 Answer
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@Tomas: I got it using SPDF$Population<-round(SPDF$aream2*SPDF$PopPerSQM)
answered Nov 11 at 12:30
Cliff
86
add a comment |
@Tomas: I got it using SPDF$Population<-round(SPDF$aream2*SPDF$PopPerSQM)
answered Nov 11 at 12:30
Cliff
86
add a comment |
@Tomas: I got it using SPDF$Population<-round(SPDF$aream2*SPDF$PopPerSQM)
answered Nov 11 at 12:30
Cliff
86
@Tomas: I got it using SPDF$Population<-round(SPDF$aream2*SPDF$PopPerSQM)
answered Nov 11 at 12:30
Cliff
86
answered Nov 11 at 12:30
Cliff
86
answered Nov 11 at 12:30
Cliff
86
answered Nov 11 at 12:30
Cliff
86
86
add a comment |
add a comment |
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A reproducible example would be very helpful here.
– Julius Vainora
Nov 11 at 11:09
Are you familiar with the str(SPDF) command and the $ and @ operators that would allow you to access different parts of the spatial polygon data frame?
– Tomas
Nov 11 at 11:11