writeOGR(GeoJSON) to string instead of file
On Wed, 6 Mar 2013, Philip Greenwood wrote:
Hi all,
This is a re-post from a few weeks ago.
I'm using writeOGR{rgdal} to a create GeoJSON temporary file then
reading the file and passing as a string in Java. It would be really
nice to avoid writing the temporary file, and have writeOGR return a
GeoJSON string.
Is this possible?
See: http://www.gdal.org/ogr/drv_geojson.html which implies no. The write driver writes to a file as far as I can see, unless you try the VSI route, dsn="/vsistdout/", but that output goes straight to the console, not through R. If you can find a way to access this output stream, you may be lucky. Roger library(rgdal) cities <- readOGR(system.file("vectors", package = "rgdal")[1], "cities") writeOGR(cities[1:10,], "/vsistdout/", "cities", driver="GeoJSON")
My project requires passing spatial data from R to Java, and then storing data as GeoJSON. I'm using RServe to interface between R and Java. Thanks. Philip Greenwood Geospatial and Analytics eEnabler Australian Urban Research Infrastructure Network (AURIN) 308 Doug McDonell Building, University of Melbourne Tel: +61-(0)3-9035-8549 philip.greenwood at unimelb.edu.au
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Roger Bivand Department of Economics, NHH Norwegian School of Economics, Helleveien 30, N-5045 Bergen, Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43 e-mail: Roger.Bivand at nhh.no