1. Smoothly Browsing 2-year GPS Log on Map

    Jan. 31, 2019 | tags: GPS

    I recorded GPS log almost everyday over 2 years from 2005 to 2007. The total size of the log is about 1GB in more than 1,000 NMEA files. There are several millions of track points.

    These numbers have been challenging for browsing all log at once on a map …

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  2. GPS Track Cleansing

    Feb. 10, 2018 | tags: GPS

    I carried my GPS logger around and took some GPS logs. Now it's time to view them.

    As my logger records everything sent from GPS receiving module without filtering, logs have some apparent outliers as shown in the image (A) below. Watch slant lines. In fact, outliers are at coordinate …

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