Android-builders-club/OsmAnd
1
0
Fork 0
Code Issues Pull requests Projects Releases Wiki Activity

Simplify Ascent/Descent methodology for analysis

Browse source
This commit is contained in:
sonora 2017-10-26 16:22:26 +02:00
parent f2933e3b36
commit 292dfb56bc
1 changed files with 13 additions and 10 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

23
OsmAnd/src/net/osmand/plus/GPXUtilities.java
View file

@ -344,8 +344,8 @@ public class GPXUtilities {
double totalSpeedSum = 0;
points = 0;
double channelThresMin = 5; // Minimum oscillation amplitude considered as noise for Up/Down analysis
double channelThres = channelThresMin; // Actual oscillation amplitude considered as noise, try depedency on current hdop/getAccuracy
double channelThresMin = 10; // Minimum oscillation amplitude considered as relevant or as above noise for accumulated Ascent/Descent analysis
double channelThres = channelThresMin; // Actual oscillation amplitude considered as above noise (accomodates depedency on current VDOP/getAccuracy if desired)
double channelBase;
double channelTop;
double channelBottom;
@ -424,8 +424,11 @@ public class GPXUtilities {
hasSpeedInTrack = true;
}
// Trend channel approach for elevation gain/loss, Hardy 2015-09-22
// Self-adjusting turnarund threshold added for testing 2015-09-25: Current rule is now: "All up/down trends of amplitude <X are ignored to smooth the noise, where X is the maximum observed DOP value of any point which contributed to the current trend (but at least 5 m as the minimum noise threshold)".
// Trend channel analysis for elevation gain/loss, Hardy 2015-09-22:
// - Detect consecutive trend channels: Only net elevation changes per each trend channel (i.e. between turnarounds) are used to accumulate the Ascent/Descent values.
// - Trend turnaround detection: Ignore oscillations of amplitude < channelThresMin, this sests the relevance threshold, and masks what is considered as noise
// - REMOVED for now: To supress marginal measurements, relax from channelThresMin to channelThres based on the maximum VDOP of any point which contributed to the current trend. Good assumption is VDOP=2*HSOP (accounts for invisibility of lower hemisphere satellites).
// - TODO: Perform the channel evaluation with Low Pass Filter (LPF) smoothed ele data instead of with the raw ele data
if (!Double.isNaN(point.ele)) {
// Init channel
if (channelBase == 99999) {
@ -437,14 +440,14 @@ public class GPXUtilities {
// Channel maintenance
if (point.ele > channelTop) {
channelTop = point.ele;
if (!Double.isNaN(point.hdop)) {
channelThres = Math.max(channelThres, 2.0 * point.hdop); //Use empirical 2*getAccuracy(vertical), this better serves very flat tracks or high dop tracks
}
//if (!Double.isNaN(point.hdop)) {
// channelThres = Math.max(channelThres, 2.0 * point.hdop); //Use empirical 2*getAccuracy(vertical), this better serves very flat tracks or high dop tracks
//}
} else if (point.ele < channelBottom) {
channelBottom = point.ele;
if (!Double.isNaN(point.hdop)) {
channelThres = Math.max(channelThres, 2.0 * point.hdop);
}
//if (!Double.isNaN(point.hdop)) {
// channelThres = Math.max(channelThres, 2.0 * point.hdop);
//}
}
// Turnaround (breakout) detection
if ((point.ele <= (channelTop - channelThres)) && (climb == true)) {