Hi Michael, I have just read, great job!
I past all the day to test the accuracy with my car, I got the data in realtime by the gps that I processed with the snaptoline function and I put the data in overlay to google maps to test the position on the road track. (Sorry for my terrible English ;-)) My gps raw data was with an error between 4/7 meters, is not bad... after snapfunction.. the position is always beside the road and not in the center of the road (How to correct it is the new challenge :-)). Actually the sampling frequency of gps data is 500ms.. probably too much cause when my car was close to some junction or other street the position jump in wrong street/road. I suppose that the problem is one the sampling and second probably that is really hard to build free navigator compass, without any limit like source and destination point. I'm planning to build an 'idea for predicting next car position to increase the accuracy knowing speed, space sampling between position... but it could be usefull only for straight road and not in curving road track... I am going to be crazy probably... but i am browsing in the dark...... with accuracy off course :-) :-) Vittorio -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/newbie-Snap-a-Point-to-a-Line-problem-with-openstreetmap-shape-file-tp6951329p6961132.html Sent from the geotools-gt2-users mailing list archive at Nabble.com. ------------------------------------------------------------------------------ RSA(R) Conference 2012 Save $700 by Nov 18 Register now http://p.sf.net/sfu/rsa-sfdev2dev1 _______________________________________________ Geotools-gt2-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users
