Customer has an SBDF file from Spotfire that contains a well-known binary (WKB) object to create a map chart, wants to import it into TERR.

 

Product: TIBCO Enterprise Runtime for R Version: All supported versions OS: All supported Operating Systems

There is a new package available on CRAN which contains this functionality.  The wkb package contains a function named readWKB() which will convert well-known binary (WKB) geometry representations to Spatial objects (for example, a SpatialPolygon object).  

To install the package in TERR, run:

install.packages("wkb")

at the command prompt.  

You will then need to do the following in TERR to read this sbdf file and convert it to a SpatialPolygon:

# Load the package needed to read in the SBDF file
library(SpotfireData)

# Load the wkb and sp packages needed to convert the imported object into a SpatialPolygon
library(wkb)
library(sp)

# Run the import code
test.in <- importDataFromSBDF("<path_to_file>/usa_st.sbdf")

# Run the conversion function from wkb
# You will only want to pass the binary portion of the data (i.e. Geometry)
test.sp <- readWKB(test.in$Geometry)

# View the class of the object
class(test.sp)

For example:

> class(test.sp)

[1] "SpatialPolygons"

The wkb package also contains functions which will allow you to write well-known binary objects.

How can I read an SBDF file from Spotfire that contains a well-known binary (WKB) object into TERR.

The PDF for this package is available online at:

http://cran.r-project.org/web/packages/wkb/wkb.pdf