KML files can also store much more information such as modeling information, layers and overlays.Ī KMZ file is a zipped KML file, and is a common format for sharing KML files. Similar to a GPX file, KML files are readable with a text editor and at the most basic level they store latitude and longitude data in WGS84. KML stands for Keyhole Markup Language, and it was originally developed as a data format for Google Earth. You can view the contents of a GPX file using a simple text editor on your computer. In a GPX file, data is saved as latitude and longitude in the WGS84 datum. In fact, if a GPX file contains info tags that CalTopo does not recognize, you may not be able to import that file. There may be additional information in the file such as timestamps and date, elevation, and more, but these are not required. GPX, or GPS Exchange Format is an open source file format that contains information types such as coordinates, waypoints, tracks and routes. GPX files are the standard format for most GPS units. Below we will look at how they differ and when to use one or another. Additionally, both tools currently have a link for connecting directly to Garmin GPS devices through GPSIO, although with newer devices it is not necessary to have a special connection.ĬalTopo works with three types of object files: GPX, KML, and GeoJSON. The export function has more options, starting with the ability to export the three file types, as well as add a connection to Google Earth or copy map data to a new map. The import function allows you to bring in GPX, KML, or GeoJSON data files and we will talk about what each of these file types are. The export menu is available when the map has objects on it. Mutual Aid Incidents (Formerly Events) Quick Guidesīuilt with Grav - The Modern Flat File CMS.Course: CalTopo (SARTopo) for Incident Response.Moving Your Data From Other Mapping Programs.Folders, Bulk Ops, and Data Management in CalTopo.Working with Existing Lines and Polygons.Managing Your Data: Maps, Tracks, Layers, Icons, and More.BTW, Google, would it kill you to have KML files created in Google Earth terminate in CR-LF instead of just LF? It would simplify the job of reading them in correctly. No real checks for overwriting older files, and may not work on every file correctly (report bugs). Help button takes you to this page Exit does what you’d expect. If the pop-up becomes annoying (which it will), check the box in the lower-left-hand corner to turn it off. You’ll get a pop-up box with the name and location of the new file, which should always be the same location as the input file. Run the program (won’t win any interface awards):Ĭlick on the main button, choose the GPX or KML file you want to process, and the program will remove the time data from the file, and save it with “_TS” appended to the filename. Download the file at this link it’s a zipped stand-alone executable. Until then, I banged together a simple Windows-only program called GPXTimeStripper that will remove all time-related data from a GPX file (KML files, too, although this may not work in every case). This is pretty retarded behavior I hope Google adds the option to turn off time-related data display when it’s not wanted. Same behavior if you save the data permanently to “My Places”. To see all the waypoints, you’ll need to move the “start-time-extent” slider all the way to the left: Hitting the play button on the time slider will make the waypoints appear and disappear quickly, and at the end the only waypoint visible will be the last one created the time slider will look like this: If you uncheck the GPS data box in the Places pane to hide the data, then check it again, you’ll see nothing at all except the time slider: You only see all the waypoints when the time slider has run all the way through to the end. The first time you open the file, the time slider will run from start to finish, with waypoints popping up and disappearing as the time indicator hits their creation time. In a recent GPS talk I gave, I surprised some people when I told them that Google Earth can open some GPS-related formats like GPX, LOC and others directly you just need to select the type of files you want to open with the drop-down in the lower-right corner:īut if the waypoints in GPX files come time-stamped, either with the time you created them in the field or in a program, Google Earth assumes that you want to use this time-related data, and brings up a time slider in the upper-left-hand corner: In the process of writing yesterday’s post on Garmin Basecamp, I found an annoying flaw on how Google Earth handles GPX files.
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