bool SrtmHgtFile::determineSrtmInfo(const std::string& srtmFilename, std::streamoff size)
{
// Extract the number of latitude and longitude lines
unsigned int num_lat;
unsigned int num_lon;
// Extract the data intervals for latitude and longitude
switch (size) {
case 2884802:
latSpacing = 3.0 / 3600.0;
lonSpacing = 3.0 / 3600.0;
num_lat = 1201;
num_lon = 1201;
break;
case 25934402:
latSpacing = 1.0 / 3600.0;
lonSpacing = 1.0 / 3600.0;
num_lat = 3601;
num_lon = 3601;
break;
default:
return false;
}
// valid SRTM file extensions
std::string ext1(".hgt");
std::string ext2(".HGT");
if (srtmFilename.substr(7, 4) != ".hgt" && srtmFilename.substr(7, 4) != ".HGT") {
return false;
}
// nXXwXXX.hgt srtm1 srtm3
int swcLatitude = std::atoi(srtmFilename.substr(1, 2).c_str());
int swcLongitude = std::atoi(srtmFilename.substr(4, 3).c_str());
char ns = (char)tolower(srtmFilename[0]);
char ew = (char)tolower(srtmFilename[3]);
if ((ns != 'n' && ns != 's') || (ew != 'e' && ew != 'w')) {
return false;
}
if (ns == 's') {
swcLatitude = -swcLatitude;
}
if (ew == 'w') {
swcLongitude = -swcLongitude;
}
setLatitudeSW( swcLatitude );
setLongitudeSW( swcLongitude );
setLatitudeNE( swcLatitude + 1 );
setLongitudeNE( swcLongitude + 1 );
nptlat = num_lat;
nptlong = num_lon;
return true;
}
bool VCompDialog::legalExt()
{
MTarget *curtarg;
int i = _imagelist->selected();
if( i >= 0 ) {
curtarg = (MTarget *)_tgList[i];
WString ext1( curtarg->tgtMask().ext() );
WString ext2( _fn->ext() );
if( ext2.size() == 0 ) {
_fn->setExt( ext1 );
return TRUE;
}
if( ext1 == ext2 ) {
return TRUE;
}
WString n; curtarg->name( n );
WMessageDialog::messagef( this, MsgError, MsgOk, _viperError, "'%s' is not a legal file extension for '%s'", (const char*)ext2, (const char*)n );
} else {
WMessageDialog::messagef( this, MsgError, MsgOk, _viperError, "Select an image type." );
}
return FALSE;
}
void ExtractEulerAngles(void)
{
EulerAngleRoll = ext2(VectorX);
EulerAnglePitch = ext2(VectorY);
}
