There may also be multi-path effects from the material making up the buildings around you, whereby signals bounce off them so the receiver actually thinks it is somewhere in the buildings around. Often when in city centres there are many tall buildings that can block these signals and stop the GPS from being able to work out where it is. Why do I get bad signal / traces in city centres / near big metal buildings?įor a GPS to work and achieve some accuracy it needs to receive at least four satellite signals. If you're using JOSM or another offline editor, just load the track from your hard drive.If you're using Potlatch, find the 'edit' link to the right of your track (in the GPS traces listing), and click this - not the usual Edit tab at the top.If you're using iD just drag'n'drop the gpx file onto the editor area.You don't need to wait for this to start mapping, however: At busy times (especially weekends), there can indeed be a wait before your trace is added to the database. The trace is waiting for processing and insertion into the gps trace database. My uploaded trace has "PENDING" next to it. Usually the tags are the names of countries, cities and other places your trace concerns. For example, all the traces tagged 'Melbourne' are listed at Please note that tags are case-sensitive - so Melbourne and melbourne may supply different results.Įach file can have many tags, and you can enter as many as you like with commas (",") between them. They make your GPX file findable with a single word and allow you to group the trace alongside other similar traces. When uploading GPX files, tags provide a simple way to describe your GPS traces. What are GPX file tags? Note: Tagging traces is completely separate from tagging OSM data itself. Otherwise, You have to download it and check "Local GPX file" checkbox in Map Data section. Note: Your have to upload your gpx trace as a public trace to be able to see it directly in the iD editor.
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