Another option is to crowdsource the rectification using mapwarper:
http://warper.geothings.net/
But this becomes a chicken and egg problem, some OSM roads along
Bulacan area may not be a reliable ground control points.
I will slice the whole image into slices with small overlaps.
On Fri, Jan
Hi,
As promised, we have a possible new imagery to add in Eastern Bulacan Area.
Approximate image resolution is 10 meters. Not as good as what is in
Pangasinan, but better than LANDSAT and this is more recent
(20080312).
The sample image is here:
