Transfer OGR sources incrementally that are too large to fit in memory

[brownag]

[...] it may sometimes be desirable to transfer between OGR sources without reading them into memory. Minimal support for querying and writing a SpatVectorProxy for an arbitrary source was added in 8f3cae4... but a more general solution would use an ogr2ogr-like interface, rather than going through a SpatVector/R intermediate object.

Originally posted by @brownag in #15 (comment)

[brownag]

To clarify--this may require incremental reading into memory--but the key goal is that sources that are too large to fit in memory will not be read in their entirety, but rather read/write in chunks.

[brownag]

An alternative to hand rolling an approach for this would be to use gdalraster::ogr2ogr()--a new feature in current development (1.9.0.9070) version--which should be able to do exactly what this issue calls for; related to #19