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Allow location coordinates in ISO6709 format

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Allows location coordinates to be entered in ISO6709(2008)
Annex D format. e.g. 50°40'46,461"N 95°48'26,533"W
see http://en.wikipedia.org/wiki/ISO_6709#Representation_at_the_human_interface_.28Annex_D.29
for suggested format.

Signed-off-by: Tim Wootton <tim@tee-jay.demon.co.uk>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
This commit is contained in:
Tim Wootton 2013-12-31 22:14:38 +00:00 • committed by Dirk Hohndel
parent 7771158c82
commit 41876f974e
1 changed files with 24 additions and 7 deletions
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31
qthelper.cpp
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@ -104,8 +104,9 @@ QString weight_string(int weight_in_grams)
bool parseGpsText(const QString& gps_text, double *latitude, double *longitude)
{
enum { SECONDS, MINUTES, DECIMAL } gpsStyle = DECIMAL;
enum { ISO6709D, SECONDS, MINUTES, DECIMAL } gpsStyle = ISO6709D;
int eastWest = 4;
int northSouth = 1;
QString regExp;
/* an empty string is interpreted as 0.0,0.0 and therefore "no gps location" */
if (gps_text.trimmed() == "") {
@ -114,8 +115,16 @@ bool parseGpsText(const QString& gps_text, double *latitude, double *longitude)
return true;
}
// trying to parse all formats in one regexp might be possible, but it seems insane
// so handle the three formats we understand separately
if (gps_text.count(QChar('"')) == 2) {
// so handle the four formats we understand separately
// ISO 6709 Annex D representation
// http://en.wikipedia.org/wiki/ISO_6709#Representation_at_the_human_interface_.28Annex_D.29
if (gps_text.at(0).isDigit()) {
gpsStyle = ISO6709D;
regExp = QString("(\\d+)[" UTF8_DEGREE "\\s](\\d+)[\'\\s](\\d+)([,\\.](\\d+))?[\"\\s]([NS%1%2])"
"\\s*(\\d+)[" UTF8_DEGREE "\\s](\\d+)[\'\\s](\\d+)([,\\.](\\d+))?[\"\\s]([EW%3%4])")
.arg(tr("N")).arg(tr("S")).arg(tr("E")).arg(tr("W"));
} else if (gps_text.count(QChar('"')) == 2) {
gpsStyle = SECONDS;
regExp = QString("\\s*([NS%1%2])\\s*(\\d+)[" UTF8_DEGREE "\\s]+(\\d+)[\'\\s]+(\\d+)([,\\.](\\d+))?[^EW%3%4]*"
"([EW%6%7])\\s*(\\d+)[" UTF8_DEGREE "\\s]+(\\d+)[\'\\s]+(\\d+)([,\\.](\\d+))?")
@ -126,6 +135,7 @@ bool parseGpsText(const QString& gps_text, double *latitude, double *longitude)
"([EW%6%7])\\s*(\\d+)[" UTF8_DEGREE "\\s]+(\\d+)([,\\.](\\d+))?")
.arg(tr("N")).arg(tr("S")).arg(tr("E")).arg(tr("W")).arg(tr("E")).arg(tr("W"));
} else {
gpsStyle = DECIMAL;
regExp = QString("\\s*([-NS%1%2]?)\\s*(\\d+)[,\\.](\\d+)[^-EW%3%4\\d]*([-EW%5%6]?)\\s*(\\d+)[,\\.](\\d+)")
.arg(tr("N")).arg(tr("S")).arg(tr("E")).arg(tr("W")).arg(tr("E")).arg(tr("W"));
}
@ -134,6 +144,14 @@ bool parseGpsText(const QString& gps_text, double *latitude, double *longitude)
// qDebug() << "Hemisphere" << r.cap(1) << "deg" << r.cap(2) << "min" << r.cap(3) << "decimal" << r.cap(4);
// qDebug() << "Hemisphere" << r.cap(5) << "deg" << r.cap(6) << "min" << r.cap(7) << "decimal" << r.cap(8);
switch(gpsStyle) {
case ISO6709D:
*latitude = r.cap(1).toInt() + r.cap(2).toInt() / 60.0 +
(r.cap(3) + QString(".") + r.cap(5)).toDouble() / 3600.0;
*longitude = r.cap(7).toInt() + r.cap(8).toInt() / 60.0 +
(r.cap(9) + QString(".") + r.cap(11)).toDouble() / 3600.0;
northSouth = 6;
eastWest = 12;
break;
case SECONDS:
*latitude = r.cap(2).toInt() + r.cap(3).toInt() / 60.0 +
(r.cap(4) + QString(".") + r.cap(6)).toDouble() / 3600.0;
@ -147,15 +165,14 @@ bool parseGpsText(const QString& gps_text, double *latitude, double *longitude)
eastWest = 6;
break;
case DECIMAL:
default:
default:
*latitude = (r.cap(2) + QString(".") + r.cap(3)).toDouble();
*longitude = (r.cap(5) + QString(".") + r.cap(6)).toDouble();
eastWest = 4;
break;
}
if (r.cap(1) == "S" || r.cap(1) == tr("S") || r.cap(1) == "-")
if (r.cap(northSouth) == "S" || r.cap(northSouth) == tr("S") || r.cap(northSouth) == "-")
*latitude *= -1.0;
if (r.cap(eastWest) == "W" || r.cap(5) == tr("W") || r.cap(5) == "-")
if (r.cap(eastWest) == "W" || r.cap(eastWest) == tr("W") || r.cap(eastWest) == "-")
*longitude *= -1.0;
// qDebug("%s -> %8.5f / %8.5f", gps_text.toLocal8Bit().data(), *latitude, *longitude);
return true;