Support BigTIFF format in GDAL

[adam@…]

When built with internal libtiff or with libtiff >= 4.0, GDAL supports reading and writing BigTIFF files as described here: ​http://www.gdal.org/frmt_gtiff.html

GDAL in macports is currently 1.6.2 and the internal libtiff has been at version 4 since GDAL 1.5.0. The current libtiff in macports is 3.9.1 so the easiest way to support BigTIFF is to compile GDAL with the --with-libtiff=internal and --with-geotiff=internal options.

[seanasy@…]

If libtiff was updated, would that solve the problem as well? I prefer that solution if only to keep a system's number of installed tiff libraries down. But I could be convinced...

[katzlbt@…]

I have verified that this works by creating a variant for my 1.7.0b1 version of this Port:

variant bigtiff description {Enable bigtiff support.} {

configure.args-delete --with-libtiff=${prefix} --with-geotiff=${prefix} configure.args-append --with-libtiff=internal --with-geotiff=internal

}

gdal 1.7.0 is about 100x faster in manipulating huge tiff images it is due any time now.

[jmr@…]

The tiff port is not going to be updated to 4.x until there is a stable release. It's currently still in beta.

[katzlbt@…]

Why wait if a variant adds BigTIFF support now? I am patching my Portfile with every release.

# BIGTIFF SUPPORT
variant bigtiff description {Enable bigtiff support.} {
	configure.args-delete	--with-libtiff=${prefix} --with-geotiff=${prefix}
	configure.args-append	--with-libtiff=internal --with-geotiff=internal
}