Displaying 3 results from an estimated 3 matches for "geomfromtext".
2006 Aug 18
1
customization of ActiveRecord models
I''m trying to determine how/if I can use MySql''s spatial extensions
with ActiveRecord. The spatial extensions usually require inserts in
the following format:
INSERT INTO `locations` (name, point) VALUES ("location
name",GeomFromText(''POINT(<lng> <lat>''));
And reads as
SELECT name, AsText(point) AS point FROM locations;
While I understand there''s methods to issue custom finder commands, I
don''t recall seeing anything about custom inserts/updates.
Does anyone have any recommend...
2006 Apr 06
1
rounding of voronoi vertices using deldir()
...# generate voronoi edges
tiles = tile.list(voro) # combine edges into polygons
sink("voronoi.sql") # redirect output to file
for (i in 1:length(tiles)) { # write out polygons
tile = tiles[[i]]
cat("insert into mytable (the_geom) values(geomfromtext('POLYGON((")
for (j in 1:length(tile$x)) {
cat (tile$x[[j]],' ',tile$y[[j]],",")
}
cat (tile$x[[1]],' ',tile$y[[1]]) #close polygon
cat ("))',32718));\n") # add SRID and newline
}
sink()...
2006 Jul 11
18
Zip Code Ranges
Does anyone have any recommendations for working with zip code distance
ranges? I need to calculate the distances between US zip codes.
Thanks!
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