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#1
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AVIATIONTOOLBOX: plot GPS log
I needed a break this morning so I whipped up a trivial little script
to create a sectional image from GPS data. https://aviationtoolbox.org/Members/...ools/trip_plot It just barely works but it takes NMEA $GPRMC sentences and generates a JPEG. I noticed that there are people who like to document their flights in this way so I thought such a tool might be useful. Lots of improvements to make to it but I need to get back to other things right now. Enjoy. --kyler |
#2
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"Kyler Laird" wrote in message news I needed a break this morning so I whipped up a trivial little script to create a sectional image from GPS data. https://aviationtoolbox.org/Members/...ools/trip_plot It just barely works but it takes NMEA $GPRMC sentences and generates a JPEG. I noticed that there are people who like to document their flights in this way so I thought such a tool might be useful. Lots of improvements to make to it but I need to get back to other things right now. Enjoy. Kyler, I think that's a great idea! My suggestion would be to use as input some format other than NMEA sentences though. My favorite would be of course oziexplorer ".plt" file format-- but any format to which gpsbabel can translate would be preferable over the NMEA (to which gpsbabel can NOT translate AFAIK). Thanks for your efforts! Cheers, John Clonts Temple, Texas |
#3
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"John Clonts" writes:
My suggestion would be to use as input some format other than NMEA sentences though. My favorite would be of course oziexplorer ".plt" file format-- Try it now. --kyler |
#4
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"Kyler Laird" wrote in message ... "John Clonts" writes: My suggestion would be to use as input some format other than NMEA sentences though. My favorite would be of course oziexplorer ".plt" file format-- Try it now. --kyler Excellent, thanks!! John |
#5
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"John Clonts" writes:
Excellent, thanks!! O.k., so real Ozi files work. I appreciate knowing that. (I tested with an NMEA file that I'd converted to .plt. BTW, GPSbabel *can* convert back to NMEA sentences.) Are there other commonly used formats? I've only made direct captures from a GPS receiver so I don't have any experience with the various flavors but GPSbabel sure does support a bunch. I'm hesitant to just enable all of them because it looks like some might require extra parameters to be specified. I'd rather enable just those that people want to use. I'll also take requests for enhancements. I have a few in mind already. Thank you. --kyler |
#6
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"Kyler Laird" wrote in message ... "John Clonts" writes: Excellent, thanks!! O.k., so real Ozi files work. I appreciate knowing that. (I tested with an NMEA file that I'd converted to .plt. BTW, GPSbabel *can* convert back to NMEA sentences.) It does? I've only used it through http://wayhoo.com/index/a/gpsbabel/. I don't see NMEA in the options list-- am I missing something? Are there other commonly used formats? I've only made direct captures from a GPS receiver so I don't have any experience with the various flavors but GPSbabel sure does support a bunch. I'm hesitant to just enable all of them because it looks like some might require extra parameters to be specified. I'd rather enable just those that people want to use. I'll also take requests for enhancements. I have a few in mind already. Enhancement to track-plot: have an option to produce the sectional chunk WITHOUT the actual track. Other enhancement: produce a sectional chunk given two airport id's. Thank you. --kyler Cheers! John |
#7
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"John Clonts" writes:
O.k., so real Ozi files work. I appreciate knowing that. (I tested with an NMEA file that I'd converted to .plt. BTW, GPSbabel *can* convert back to NMEA sentences.) It does? I've only used it through http://wayhoo.com/index/a/gpsbabel/. I don't see NMEA in the options list-- am I missing something? Yes. Get the real thing. http://gpsbabel.sourceforge.net/ The file format is "nmea". http://gpsbabel.sourceforge.net/capabilities.html Enhancement to track-plot: have an option to produce the sectional chunk WITHOUT the actual track. That's not an enhancement...that's the only way I can produce GeoTIFFs right now. (I had it working that way for awhile.) I haven't gotten to where I can modify an image (using PIL) and then put the geo data back on it. So this is useful? It's not much of a "plot" but I've enabled it. Other enhancement: produce a sectional chunk given two airport id's. Hmmm...we're getting into less plotting and more chunking. I can see where you're headed. I'll try to build another tool for specifying chunks easily. --kyler |
#8
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"Kyler Laird" wrote in message ... "John Clonts" writes: O.k., so real Ozi files work. I appreciate knowing that. (I tested with an NMEA file that I'd converted to .plt. BTW, GPSbabel *can* convert back to NMEA sentences.) It does? I've only used it through http://wayhoo.com/index/a/gpsbabel/. I don't see NMEA in the options list-- am I missing something? Yes. Get the real thing. http://gpsbabel.sourceforge.net/ The file format is "nmea". http://gpsbabel.sourceforge.net/capabilities.html Ok. Enhancement to track-plot: have an option to produce the sectional chunk WITHOUT the actual track. That's not an enhancement...that's the only way I can produce GeoTIFFs right now. (I had it working that way for awhile.) I haven't gotten to where I can modify an image (using PIL) and then put the geo data back on it. If I understand you correctly, the "TIFF" option does not produce geotiff info, but does produce the graphical plot of the track. The "GeoTIFF without plot" option produces the geotiff without the graphical plot. This is indeed the "enhancement" I was talking about, thanks So this is useful? It's not much of a "plot" but I've enabled it. I like having the sectional boundaries chosen to include the specified track. The plot is not as important, as Oziexplorer does that part very well. Other enhancement: produce a sectional chunk given two airport id's. Hmmm...we're getting into less plotting and more chunking. I can see where you're headed. I'll try to build another tool for specifying chunks easily. Where AM I headed? I'm saying, give me the sectional whose boundaries are chosen to include the specified airports, in a similar way as it works with the plot above. Thanks Kyler! Cheers, John |
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