I have a data set which has sets of geographic coordinates for a list of properties. Each property has coordinates for buildings. How can I estimate the size of each property using these coordinates in SAS? I'm thinking I could go by the furthest points North, South, East, and West and use that to estimate the total area in acres (43,560 sq ft).
I figured out the issue. Elementary. To convert to acres I had to MULTIPLY the sq miles estimate by 640, not divide.
proc sql;
create table MAX_COOR as select PROP, max(lat) as NORTH, min(lat) as SOUTH, max(lon) as EAST, min(lon) as WEST
from BLDGS
group by PROP;
quit;
data dist; set MAX_COOR;
distance_length = geodist(NORTH, EAST, NORTH, WEST, 'M');
distance_width = geodist(NORTH, EAST, SOUTH, EAST, 'M');
run;
data area; set dist;
area_acres = (distance_length * distance_width)*640;
run;
This is a situation where you have a very specific question, and the best way to get a solution is via Internet search.
"calculate area of polygon from lat long"
Here is a solution, it isn't SAS, but you could easily adapt it to SAS
https://www.sisense.com/blog/polygon-area-from-latitude-and-longitude-using-sql/
Here is what I have, but the area values don't look correct. Am checking data...
proc sql;
create table MAX_COOR as select PROP, max(lat) as NORTH, min(lat) as SOUTH, max(lon) as EAST, min(lon) as WEST
from BLDGS
group by PROP;
quit;
data dist; set MAX_COOR;
distance_length = geodist(NORTH, EAST, NORTH, WEST, 'M');
distance_width = geodist(NORTH, EAST, SOUTH, EAST, 'M');
run;
data area; set dist;
area_acres = (distance_length * distance_width)/640;
run;
Share your data as SAS data step code (instructions)
I figured out the issue. Elementary. To convert to acres I had to MULTIPLY the sq miles estimate by 640, not divide.
proc sql;
create table MAX_COOR as select PROP, max(lat) as NORTH, min(lat) as SOUTH, max(lon) as EAST, min(lon) as WEST
from BLDGS
group by PROP;
quit;
data dist; set MAX_COOR;
distance_length = geodist(NORTH, EAST, NORTH, WEST, 'M');
distance_width = geodist(NORTH, EAST, SOUTH, EAST, 'M');
run;
data area; set dist;
area_acres = (distance_length * distance_width)*640;
run;
Are you ready for the spotlight? We're accepting content ideas for SAS Innovate 2025 to be held May 6-9 in Orlando, FL. The call is open until September 16. Read more here about why you should contribute and what is in it for you!
Learn how use the CAT functions in SAS to join values from multiple variables into a single value.
Find more tutorials on the SAS Users YouTube channel.
Select SAS Training centers are offering in-person courses. View upcoming courses for: