It slowly is getting crowded around raster libraries in C++. Another alternative is GIL developed by Adobe and included in Boost C++ Libraries with collection of IO and more extensions.

Just what tigers like best. Isn’t it?

A few minutes ago, Suchith Anand announced there will be live streaming transmission available from OSGIS sessions. This is cool!

By the way, does anyone remember a kind of pioneer transmission from FOSS4G 2006 in Lausanne? The videos are still linked but seem to be unavailable. Pity. It would be cool to archive them somewhere on foss4g.org.

SELECT
   ST_AsText(
      ST_GeomFromWKB(
         decode('0101000000e5d022dbf93e2e40dbf97e6abc743540', 'hex'),
         4326))

I often need to do the same directly in C++ code – parse hex encoded binary stream to raw stream of bytes. Here is simple hex decoder I use:

#include <sstream>
#include <string>
#include <vector>
typedef std::vector<unsigned char> ewkb_t;

// bytes [out] - buffer for binary output
void hex_to_bytes(std::string const& hexstr, ewkb_t& bytes)
{
    bytes.clear();
    for(std::string::size_type i = 0; i < hexstr.size() / 2; ++i)
    {
        std::istringstream iss(hexstr.substr(i * 2, 2));
        unsigned int n;
        iss >> std::hex >> n;
        bytes.push_back(static_cast<unsigned char>(n));
    }
}

For example, I use it to build FDO geometry objects using another utility CreateGeometryFromExtendedWkb defined in FDO provider for PostGIS:

// POINT (1.234 5.678)
std::string ewkbhex("01010000005839B4C876BEF33F83C0CAA145B61640");
ewkb_t ewkb;
hex_to_bytes(ewkbhex, ewkb);
if (!ewkb.empty())
{
   FdoPtr<fdoigeometry> g = CreateGeometryFromExtendedWkb(ewkb);
   // ... use geometry
}