double ossimDtedElevationDatabase::getHeightAboveMSL(const ossimGpt& gpt)
{
if(!isSourceEnabled())
return ossim::nan();
double result = ossim::nan();
m_mutex.lock();
if(m_lastHandler.valid() && m_lastHandler->pointHasCoverage(gpt))
{
result = m_lastHandler->getHeightAboveMSL(gpt);
}
else
{
m_lastHandler = getOrCreateCellHandler(gpt);
if(m_lastHandler.valid())
result = m_lastHandler->getHeightAboveMSL(gpt);
}
#if 0
d_mutex.lock();
cout << "THREAD ID: "<<OpenThreads::Thread::CurrentThread()->getThreadId()<<" "
<<"ossimDtedElevationDatabase @ "<<(unsigned long)this<<" m_lastHandler @ "
<<(unsigned long)m_lastHandler.get()<<endl; //### TODO: for debug, remove
d_mutex.unlock();
#endif
m_mutex.unlock();
return result;
}
double ossimDtedElevationDatabase::getHeightAboveMSL(const ossimGpt& gpt)
{
if(!isSourceEnabled()) return ossim::nan();
ossimRefPtr<ossimElevCellHandler> handler = getOrCreateCellHandler(gpt);
if(handler.valid())
{
return handler->getHeightAboveMSL(gpt); // still need to shift
}
return ossim::nan();
}
double ossimImageElevationDatabase::getHeightAboveMSL(const ossimGpt& gpt)
{
double h = ossim::nan();
if(isSourceEnabled())
{
ossimRefPtr<ossimElevCellHandler> handler = getOrCreateCellHandler(gpt);
if(handler.valid())
{
h = handler->getHeightAboveMSL(gpt); // still need to shift
}
}
return h;
}